diff --git a/samples/Basic/40_Duplicate_style.php b/samples/Basic/40_Duplicate_style.php
index eaff8bd6..2bddbdaf 100644
--- a/samples/Basic/40_Duplicate_style.php
+++ b/samples/Basic/40_Duplicate_style.php
@@ -1,6 +1,6 @@
 <?php
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Style\Style;
 
@@ -24,7 +24,7 @@ for ($col = 0; $col < 50; ++$col) {
     for ($row = 0; $row < 100; ++$row) {
         $str = ($row + $col);
         $style = $styles[$row % 10];
-        $coord = Cell::stringFromColumnIndex($col) . ($row + 1);
+        $coord = Coordinate::stringFromColumnIndex($col) . ($row + 1);
         $worksheet->setCellValue($coord, $str);
         $worksheet->duplicateStyle($style, $coord);
     }
diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 6cf3b63f..1d387301 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -6,6 +6,7 @@ use PhpOffice\PhpSpreadsheet\Calculation\Engine\CyclicReferenceStack;
 use PhpOffice\PhpSpreadsheet\Calculation\Engine\Logger;
 use PhpOffice\PhpSpreadsheet\Calculation\Token\Stack;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Shared;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
@@ -3491,11 +3492,11 @@ class Calculation
                             $oData = array_merge(explode(':', $operand1Data['reference']), explode(':', $operand2Data['reference']));
                             $oCol = $oRow = [];
                             foreach ($oData as $oDatum) {
-                                $oCR = Cell::coordinateFromString($oDatum);
-                                $oCol[] = Cell::columnIndexFromString($oCR[0]) - 1;
+                                $oCR = Coordinate::coordinateFromString($oDatum);
+                                $oCol[] = Coordinate::columnIndexFromString($oCR[0]) - 1;
                                 $oRow[] = $oCR[1];
                             }
-                            $cellRef = Cell::stringFromColumnIndex(min($oCol)) . min($oRow) . ':' . Cell::stringFromColumnIndex(max($oCol)) . max($oRow);
+                            $cellRef = Coordinate::stringFromColumnIndex(min($oCol)) . min($oRow) . ':' . Coordinate::stringFromColumnIndex(max($oCol)) . max($oRow);
                             if ($pCellParent !== null) {
                                 $cellValue = $this->extractCellRange($cellRef, $this->spreadsheet->getSheetByName($sheet1), false);
                             } else {
@@ -3564,11 +3565,11 @@ class Calculation
                         foreach (array_keys($rowIntersect) as $row) {
                             $oRow[] = $row;
                             foreach ($rowIntersect[$row] as $col => $data) {
-                                $oCol[] = Cell::columnIndexFromString($col) - 1;
+                                $oCol[] = Coordinate::columnIndexFromString($col) - 1;
                                 $cellIntersect[$row] = array_intersect_key($operand1[$row], $operand2[$row]);
                             }
                         }
-                        $cellRef = Cell::stringFromColumnIndex(min($oCol)) . min($oRow) . ':' . Cell::stringFromColumnIndex(max($oCol)) . max($oRow);
+                        $cellRef = Coordinate::stringFromColumnIndex(min($oCol)) . min($oRow) . ':' . Coordinate::stringFromColumnIndex(max($oCol)) . max($oRow);
                         $this->debugLog->writeDebugLog('Evaluation Result is ', $this->showTypeDetails($cellIntersect));
                         $stack->push('Value', $cellIntersect, $cellRef);
 
@@ -4103,7 +4104,7 @@ class Calculation
             }
 
             // Extract range
-            $aReferences = Cell::extractAllCellReferencesInRange($pRange);
+            $aReferences = Coordinate::extractAllCellReferencesInRange($pRange);
             $pRange = $pSheetName . '!' . $pRange;
             if (!isset($aReferences[1])) {
                 //    Single cell in range
@@ -4158,7 +4159,7 @@ class Calculation
             if ($namedRange !== null) {
                 $pSheet = $namedRange->getWorksheet();
                 $pRange = $namedRange->getRange();
-                $splitRange = Cell::splitRange($pRange);
+                $splitRange = Coordinate::splitRange($pRange);
                 //    Convert row and column references
                 if (ctype_alpha($splitRange[0][0])) {
                     $pRange = $splitRange[0][0] . '1:' . $splitRange[0][1] . $namedRange->getWorksheet()->getHighestRow();
@@ -4170,10 +4171,10 @@ class Calculation
             }
 
             // Extract range
-            $aReferences = Cell::extractAllCellReferencesInRange($pRange);
+            $aReferences = Coordinate::extractAllCellReferencesInRange($pRange);
             if (!isset($aReferences[1])) {
                 //    Single cell (or single column or row) in range
-                list($currentCol, $currentRow) = Cell::coordinateFromString($aReferences[0]);
+                list($currentCol, $currentRow) = Coordinate::coordinateFromString($aReferences[0]);
                 if ($pSheet->cellExists($aReferences[0])) {
                     $returnValue[$currentRow][$currentCol] = $pSheet->getCell($aReferences[0])->getCalculatedValue($resetLog);
                 } else {
@@ -4183,7 +4184,7 @@ class Calculation
                 // Extract cell data for all cells in the range
                 foreach ($aReferences as $reference) {
                     // Extract range
-                    list($currentCol, $currentRow) = Cell::coordinateFromString($reference);
+                    list($currentCol, $currentRow) = Coordinate::coordinateFromString($reference);
                     if ($pSheet->cellExists($reference)) {
                         $returnValue[$currentRow][$currentCol] = $pSheet->getCell($reference)->getCalculatedValue($resetLog);
                     } else {
diff --git a/src/PhpSpreadsheet/Calculation/LookupRef.php b/src/PhpSpreadsheet/Calculation/LookupRef.php
index 636fb59e..e8de720c 100644
--- a/src/PhpSpreadsheet/Calculation/LookupRef.php
+++ b/src/PhpSpreadsheet/Calculation/LookupRef.php
@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet\Calculation;
 
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 
 class LookupRef
 {
@@ -52,7 +53,7 @@ class LookupRef
         }
         if ((!is_bool($referenceStyle)) || $referenceStyle) {
             $rowRelative = $columnRelative = '$';
-            $column = Cell::stringFromColumnIndex($column - 1);
+            $column = Coordinate::stringFromColumnIndex($column - 1);
             if (($relativity == 2) || ($relativity == 4)) {
                 $columnRelative = '';
             }
@@ -98,7 +99,7 @@ class LookupRef
             foreach ($cellAddress as $columnKey => $value) {
                 $columnKey = preg_replace('/[^a-z]/i', '', $columnKey);
 
-                return (int) Cell::columnIndexFromString($columnKey);
+                return (int) Coordinate::columnIndexFromString($columnKey);
             }
         } else {
             if (strpos($cellAddress, '!') !== false) {
@@ -110,14 +111,14 @@ class LookupRef
                 $endAddress = preg_replace('/[^a-z]/i', '', $endAddress);
                 $returnValue = [];
                 do {
-                    $returnValue[] = (int) Cell::columnIndexFromString($startAddress);
+                    $returnValue[] = (int) Coordinate::columnIndexFromString($startAddress);
                 } while ($startAddress++ != $endAddress);
 
                 return $returnValue;
             }
             $cellAddress = preg_replace('/[^a-z]/i', '', $cellAddress);
 
-            return (int) Cell::columnIndexFromString($cellAddress);
+            return (int) Coordinate::columnIndexFromString($cellAddress);
         }
     }
 
@@ -382,23 +383,23 @@ class LookupRef
         } else {
             $startCell = $endCell = $cellAddress;
         }
-        list($startCellColumn, $startCellRow) = Cell::coordinateFromString($startCell);
-        list($endCellColumn, $endCellRow) = Cell::coordinateFromString($endCell);
+        list($startCellColumn, $startCellRow) = Coordinate::coordinateFromString($startCell);
+        list($endCellColumn, $endCellRow) = Coordinate::coordinateFromString($endCell);
 
         $startCellRow += $rows;
-        $startCellColumn = Cell::columnIndexFromString($startCellColumn) - 1;
+        $startCellColumn = Coordinate::columnIndexFromString($startCellColumn) - 1;
         $startCellColumn += $columns;
 
         if (($startCellRow <= 0) || ($startCellColumn < 0)) {
             return Functions::REF();
         }
-        $endCellColumn = Cell::columnIndexFromString($endCellColumn) - 1;
+        $endCellColumn = Coordinate::columnIndexFromString($endCellColumn) - 1;
         if (($width != null) && (!is_object($width))) {
             $endCellColumn = $startCellColumn + $width - 1;
         } else {
             $endCellColumn += $columns;
         }
-        $startCellColumn = Cell::stringFromColumnIndex($startCellColumn);
+        $startCellColumn = Coordinate::stringFromColumnIndex($startCellColumn);
 
         if (($height != null) && (!is_object($height))) {
             $endCellRow = $startCellRow + $height - 1;
@@ -409,7 +410,7 @@ class LookupRef
         if (($endCellRow <= 0) || ($endCellColumn < 0)) {
             return Functions::REF();
         }
-        $endCellColumn = Cell::stringFromColumnIndex($endCellColumn);
+        $endCellColumn = Coordinate::stringFromColumnIndex($endCellColumn);
 
         $cellAddress = $startCellColumn . $startCellRow;
         if (($startCellColumn != $endCellColumn) || ($startCellRow != $endCellRow)) {
diff --git a/src/PhpSpreadsheet/Cell/Cell.php b/src/PhpSpreadsheet/Cell/Cell.php
index a8b0bf13..fdf9815a 100644
--- a/src/PhpSpreadsheet/Cell/Cell.php
+++ b/src/PhpSpreadsheet/Cell/Cell.php
@@ -12,13 +12,6 @@ use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
 
 class Cell
 {
-    /**
-     * Default range variable constant.
-     *
-     * @var string
-     */
-    const DEFAULT_RANGE = 'A1:A1';
-
     /**
      * Value binder to use.
      *
@@ -516,7 +509,7 @@ class Cell
     public function isMergeRangeValueCell()
     {
         if ($mergeRange = $this->getMergeRange()) {
-            $mergeRange = self::splitRange($mergeRange);
+            $mergeRange = Coordinate::splitRange($mergeRange);
             list($startCell) = $mergeRange[0];
             if ($this->getCoordinate() === $startCell) {
                 return true;
@@ -575,10 +568,10 @@ class Cell
      */
     public function isInRange($pRange)
     {
-        list($rangeStart, $rangeEnd) = self::rangeBoundaries($pRange);
+        list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($pRange);
 
         // Translate properties
-        $myColumn = self::columnIndexFromString($this->getColumn());
+        $myColumn = Coordinate::columnIndexFromString($this->getColumn());
         $myRow = $this->getRow();
 
         // Verify if cell is in range
@@ -586,447 +579,6 @@ class Cell
                 ($rangeStart[1] <= $myRow) && ($rangeEnd[1] >= $myRow);
     }
 
-    /**
-     * Coordinate from string.
-     *
-     * @param string $pCoordinateString eg: 'A1'
-     *
-     * @throws Exception
-     *
-     * @return string[] Array containing column and row (indexes 0 and 1)
-     */
-    public static function coordinateFromString($pCoordinateString)
-    {
-        if (preg_match("/^([$]?[A-Z]{1,3})([$]?\d{1,7})$/", $pCoordinateString, $matches)) {
-            return [$matches[1], $matches[2]];
-        } elseif ((strpos($pCoordinateString, ':') !== false) || (strpos($pCoordinateString, ',') !== false)) {
-            throw new Exception('Cell coordinate string can not be a range of cells');
-        } elseif ($pCoordinateString == '') {
-            throw new Exception('Cell coordinate can not be zero-length string');
-        }
-
-        throw new Exception('Invalid cell coordinate ' . $pCoordinateString);
-    }
-
-    /**
-     * Make string row, column or cell coordinate absolute.
-     *
-     * @param string $pCoordinateString e.g. 'A' or '1' or 'A1'
-     *                    Note that this value can be a row or column reference as well as a cell reference
-     *
-     * @throws Exception
-     *
-     * @return string Absolute coordinate        e.g. '$A' or '$1' or '$A$1'
-     */
-    public static function absoluteReference($pCoordinateString)
-    {
-        if (strpos($pCoordinateString, ':') === false && strpos($pCoordinateString, ',') === false) {
-            // Split out any worksheet name from the reference
-            $worksheet = '';
-            $cellAddress = explode('!', $pCoordinateString);
-            if (count($cellAddress) > 1) {
-                list($worksheet, $pCoordinateString) = $cellAddress;
-            }
-            if ($worksheet > '') {
-                $worksheet .= '!';
-            }
-
-            // Create absolute coordinate
-            if (ctype_digit($pCoordinateString)) {
-                return $worksheet . '$' . $pCoordinateString;
-            } elseif (ctype_alpha($pCoordinateString)) {
-                return $worksheet . '$' . strtoupper($pCoordinateString);
-            }
-
-            return $worksheet . self::absoluteCoordinate($pCoordinateString);
-        }
-
-        throw new Exception('Cell coordinate string can not be a range of cells');
-    }
-
-    /**
-     * Make string coordinate absolute.
-     *
-     * @param string $pCoordinateString e.g. 'A1'
-     *
-     * @throws Exception
-     *
-     * @return string Absolute coordinate        e.g. '$A$1'
-     */
-    public static function absoluteCoordinate($pCoordinateString)
-    {
-        if (strpos($pCoordinateString, ':') === false && strpos($pCoordinateString, ',') === false) {
-            // Split out any worksheet name from the coordinate
-            $worksheet = '';
-            $cellAddress = explode('!', $pCoordinateString);
-            if (count($cellAddress) > 1) {
-                list($worksheet, $pCoordinateString) = $cellAddress;
-            }
-            if ($worksheet > '') {
-                $worksheet .= '!';
-            }
-
-            // Create absolute coordinate
-            list($column, $row) = self::coordinateFromString($pCoordinateString);
-            $column = ltrim($column, '$');
-            $row = ltrim($row, '$');
-
-            return $worksheet . '$' . $column . '$' . $row;
-        }
-
-        throw new Exception('Cell coordinate string can not be a range of cells');
-    }
-
-    /**
-     * Split range into coordinate strings.
-     *
-     * @param string $pRange e.g. 'B4:D9' or 'B4:D9,H2:O11' or 'B4'
-     *
-     * @return array Array containg one or more arrays containing one or two coordinate strings
-     *                                e.g. array('B4','D9') or array(array('B4','D9'),array('H2','O11'))
-     *                                        or array('B4')
-     */
-    public static function splitRange($pRange)
-    {
-        // Ensure $pRange is a valid range
-        if (empty($pRange)) {
-            $pRange = self::DEFAULT_RANGE;
-        }
-
-        $exploded = explode(',', $pRange);
-        $counter = count($exploded);
-        for ($i = 0; $i < $counter; ++$i) {
-            $exploded[$i] = explode(':', $exploded[$i]);
-        }
-
-        return $exploded;
-    }
-
-    /**
-     * Build range from coordinate strings.
-     *
-     * @param array $pRange Array containg one or more arrays containing one or two coordinate strings
-     *
-     * @throws Exception
-     *
-     * @return string String representation of $pRange
-     */
-    public static function buildRange(array $pRange)
-    {
-        // Verify range
-        if (empty($pRange) || !is_array($pRange[0])) {
-            throw new Exception('Range does not contain any information');
-        }
-
-        // Build range
-        $imploded = [];
-        $counter = count($pRange);
-        for ($i = 0; $i < $counter; ++$i) {
-            $pRange[$i] = implode(':', $pRange[$i]);
-        }
-        $imploded = implode(',', $pRange);
-
-        return $imploded;
-    }
-
-    /**
-     * Calculate range boundaries.
-     *
-     * @param string $pRange Cell range (e.g. A1:A1)
-     *
-     * @return array Range coordinates array(Start Cell, End Cell)
-     *                    where Start Cell and End Cell are arrays (Column Number, Row Number)
-     */
-    public static function rangeBoundaries($pRange)
-    {
-        // Ensure $pRange is a valid range
-        if (empty($pRange)) {
-            $pRange = self::DEFAULT_RANGE;
-        }
-
-        // Uppercase coordinate
-        $pRange = strtoupper($pRange);
-
-        // Extract range
-        if (strpos($pRange, ':') === false) {
-            $rangeA = $rangeB = $pRange;
-        } else {
-            list($rangeA, $rangeB) = explode(':', $pRange);
-        }
-
-        // Calculate range outer borders
-        $rangeStart = self::coordinateFromString($rangeA);
-        $rangeEnd = self::coordinateFromString($rangeB);
-
-        // Translate column into index
-        $rangeStart[0] = self::columnIndexFromString($rangeStart[0]);
-        $rangeEnd[0] = self::columnIndexFromString($rangeEnd[0]);
-
-        return [$rangeStart, $rangeEnd];
-    }
-
-    /**
-     * Calculate range dimension.
-     *
-     * @param string $pRange Cell range (e.g. A1:A1)
-     *
-     * @return array Range dimension (width, height)
-     */
-    public static function rangeDimension($pRange)
-    {
-        // Calculate range outer borders
-        list($rangeStart, $rangeEnd) = self::rangeBoundaries($pRange);
-
-        return [($rangeEnd[0] - $rangeStart[0] + 1), ($rangeEnd[1] - $rangeStart[1] + 1)];
-    }
-
-    /**
-     * Calculate range boundaries.
-     *
-     * @param string $pRange Cell range (e.g. A1:A1)
-     *
-     * @return array Range coordinates array(Start Cell, End Cell)
-     *                    where Start Cell and End Cell are arrays (Column ID, Row Number)
-     */
-    public static function getRangeBoundaries($pRange)
-    {
-        // Ensure $pRange is a valid range
-        if (empty($pRange)) {
-            $pRange = self::DEFAULT_RANGE;
-        }
-
-        // Uppercase coordinate
-        $pRange = strtoupper($pRange);
-
-        // Extract range
-        if (strpos($pRange, ':') === false) {
-            $rangeA = $rangeB = $pRange;
-        } else {
-            list($rangeA, $rangeB) = explode(':', $pRange);
-        }
-
-        return [self::coordinateFromString($rangeA), self::coordinateFromString($rangeB)];
-    }
-
-    /**
-     * Column index from string.
-     *
-     * @param string $pString eg 'A'
-     *
-     * @return int Column index (base 1 !!!)
-     */
-    public static function columnIndexFromString($pString)
-    {
-        //    Using a lookup cache adds a slight memory overhead, but boosts speed
-        //    caching using a static within the method is faster than a class static,
-        //        though it's additional memory overhead
-        static $indexCache = [];
-
-        if (isset($indexCache[$pString])) {
-            return $indexCache[$pString];
-        }
-        //    It's surprising how costly the strtoupper() and ord() calls actually are, so we use a lookup array rather than use ord()
-        //        and make it case insensitive to get rid of the strtoupper() as well. Because it's a static, there's no significant
-        //        memory overhead either
-        static $columnLookup = [
-            'A' => 1, 'B' => 2, 'C' => 3, 'D' => 4, 'E' => 5, 'F' => 6, 'G' => 7, 'H' => 8, 'I' => 9, 'J' => 10, 'K' => 11, 'L' => 12, 'M' => 13,
-            'N' => 14, 'O' => 15, 'P' => 16, 'Q' => 17, 'R' => 18, 'S' => 19, 'T' => 20, 'U' => 21, 'V' => 22, 'W' => 23, 'X' => 24, 'Y' => 25, 'Z' => 26,
-            'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6, 'g' => 7, 'h' => 8, 'i' => 9, 'j' => 10, 'k' => 11, 'l' => 12, 'm' => 13,
-            'n' => 14, 'o' => 15, 'p' => 16, 'q' => 17, 'r' => 18, 's' => 19, 't' => 20, 'u' => 21, 'v' => 22, 'w' => 23, 'x' => 24, 'y' => 25, 'z' => 26,
-        ];
-
-        //    We also use the language construct isset() rather than the more costly strlen() function to match the length of $pString
-        //        for improved performance
-        if (isset($pString[0])) {
-            if (!isset($pString[1])) {
-                $indexCache[$pString] = $columnLookup[$pString];
-
-                return $indexCache[$pString];
-            } elseif (!isset($pString[2])) {
-                $indexCache[$pString] = $columnLookup[$pString[0]] * 26 + $columnLookup[$pString[1]];
-
-                return $indexCache[$pString];
-            } elseif (!isset($pString[3])) {
-                $indexCache[$pString] = $columnLookup[$pString[0]] * 676 + $columnLookup[$pString[1]] * 26 + $columnLookup[$pString[2]];
-
-                return $indexCache[$pString];
-            }
-        }
-
-        throw new Exception('Column string index can not be ' . ((isset($pString[0])) ? 'longer than 3 characters' : 'empty'));
-    }
-
-    /**
-     * String from columnindex.
-     *
-     * @param int $columnIndex Column index (A = 0)
-     *
-     * @return string
-     */
-    public static function stringFromColumnIndex($columnIndex)
-    {
-        static $indexCache = [];
-
-        if (!isset($indexCache[$columnIndex])) {
-            $indexValue = $columnIndex + 1;
-            $base26 = null;
-            do {
-                $characterValue = ($indexValue % 26) ?: 26;
-                $indexValue = ($indexValue - $characterValue) / 26;
-                $base26 = chr($characterValue + 64) . ($base26 ?: '');
-            } while ($indexValue > 0);
-            $indexCache[$columnIndex] = $base26;
-        }
-
-        return $indexCache[$columnIndex];
-    }
-
-    /**
-     * Extract all cell references in range.
-     *
-     * @param string $pRange Range (e.g. A1 or A1:C10 or A1:E10 A20:E25)
-     *
-     * @return array Array containing single cell references
-     */
-    public static function extractAllCellReferencesInRange($pRange)
-    {
-        // Returnvalue
-        $returnValue = [];
-
-        // Explode spaces
-        $cellBlocks = explode(' ', str_replace('$', '', strtoupper($pRange)));
-        foreach ($cellBlocks as $cellBlock) {
-            // Single cell?
-            if (strpos($cellBlock, ':') === false && strpos($cellBlock, ',') === false) {
-                $returnValue[] = $cellBlock;
-
-                continue;
-            }
-
-            // Range...
-            $ranges = self::splitRange($cellBlock);
-            foreach ($ranges as $range) {
-                // Single cell?
-                if (!isset($range[1])) {
-                    $returnValue[] = $range[0];
-
-                    continue;
-                }
-
-                // Range...
-                list($rangeStart, $rangeEnd) = $range;
-                sscanf($rangeStart, '%[A-Z]%d', $startCol, $startRow);
-                sscanf($rangeEnd, '%[A-Z]%d', $endCol, $endRow);
-                ++$endCol;
-
-                // Current data
-                $currentCol = $startCol;
-                $currentRow = $startRow;
-
-                // Loop cells
-                while ($currentCol != $endCol) {
-                    while ($currentRow <= $endRow) {
-                        $returnValue[] = $currentCol . $currentRow;
-                        ++$currentRow;
-                    }
-                    ++$currentCol;
-                    $currentRow = $startRow;
-                }
-            }
-        }
-
-        //    Sort the result by column and row
-        $sortKeys = [];
-        foreach (array_unique($returnValue) as $coord) {
-            sscanf($coord, '%[A-Z]%d', $column, $row);
-            $sortKeys[sprintf('%3s%09d', $column, $row)] = $coord;
-        }
-        ksort($sortKeys);
-
-        // Return value
-        return array_values($sortKeys);
-    }
-
-    /**
-     * Convert an associative array of single cell coordinates to values to an associative array
-     * of cell ranges to values.  Only adjacent cell coordinates with the same
-     * value will be merged.  If the value is an object, it must implement the method getHashCode().
-     *
-     * For example, this function converts:
-     *
-     *    [ 'A1' => 'x', 'A2' => 'x', 'A3' => 'x', 'A4' => 'y' ]
-     *
-     * to:
-     *
-     *    [ 'A1:A3' => 'x', 'A4' => 'y' ]
-     *
-     * @param array $pCoordCollection associative array mapping coordinates to values
-     *
-     * @return array associative array mapping coordinate ranges to valuea
-     */
-    public static function mergeRangesInCollection(array $pCoordCollection)
-    {
-        $hashedValues = [];
-
-        foreach ($pCoordCollection as $coord => $value) {
-            list($column, $row) = self::coordinateFromString($coord);
-            $row = (int) (ltrim($row, '$'));
-            $hashCode = $column . '-' . (is_object($value) ? $value->getHashCode() : $value);
-
-            if (!isset($hashedValues[$hashCode])) {
-                $hashedValues[$hashCode] = (object) [
-                    'value' => $value,
-                    'col' => $column,
-                    'rows' => [$row],
-                ];
-            } else {
-                $hashedValues[$hashCode]->rows[] = $row;
-            }
-        }
-
-        $mergedCoordCollection = [];
-        ksort($hashedValues);
-
-        foreach ($hashedValues as $hashedValue) {
-            sort($hashedValue->rows);
-            $rowStart = null;
-            $rowEnd = null;
-            $ranges = [];
-
-            foreach ($hashedValue->rows as $row) {
-                if ($rowStart === null) {
-                    $rowStart = $row;
-                    $rowEnd = $row;
-                } elseif ($rowEnd === $row - 1) {
-                    $rowEnd = $row;
-                } else {
-                    if ($rowStart == $rowEnd) {
-                        $ranges[] = $hashedValue->col . $rowStart;
-                    } else {
-                        $ranges[] = $hashedValue->col . $rowStart . ':' . $hashedValue->col . $rowEnd;
-                    }
-
-                    $rowStart = $row;
-                    $rowEnd = $row;
-                }
-            }
-
-            if ($rowStart !== null) {
-                if ($rowStart == $rowEnd) {
-                    $ranges[] = $hashedValue->col . $rowStart;
-                } else {
-                    $ranges[] = $hashedValue->col . $rowStart . ':' . $hashedValue->col . $rowEnd;
-                }
-            }
-
-            foreach ($ranges as $range) {
-                $mergedCoordCollection[$range] = $hashedValue->value;
-            }
-        }
-
-        return $mergedCoordCollection;
-    }
-
     /**
      * Compare 2 cells.
      *
@@ -1041,7 +593,7 @@ class Cell
             return -1;
         } elseif ($a->getRow() > $b->getRow()) {
             return 1;
-        } elseif (self::columnIndexFromString($a->getColumn()) < self::columnIndexFromString($b->getColumn())) {
+        } elseif (Coordinate::columnIndexFromString($a->getColumn()) < Coordinate::columnIndexFromString($b->getColumn())) {
             return -1;
         }
 
diff --git a/src/PhpSpreadsheet/Cell/Coordinate.php b/src/PhpSpreadsheet/Cell/Coordinate.php
new file mode 100644
index 00000000..96ff39a8
--- /dev/null
+++ b/src/PhpSpreadsheet/Cell/Coordinate.php
@@ -0,0 +1,456 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Cell;
+
+use PhpOffice\PhpSpreadsheet\Exception;
+
+abstract class Coordinate
+{
+    /**
+     * Default range variable constant.
+     *
+     * @var string
+     */
+    const DEFAULT_RANGE = 'A1:A1';
+
+    /**
+     * Coordinate from string.
+     *
+     * @param string $pCoordinateString eg: 'A1'
+     *
+     * @throws Exception
+     *
+     * @return string[] Array containing column and row (indexes 0 and 1)
+     */
+    public static function coordinateFromString($pCoordinateString)
+    {
+        if (preg_match("/^([$]?[A-Z]{1,3})([$]?\d{1,7})$/", $pCoordinateString, $matches)) {
+            return [$matches[1], $matches[2]];
+        } elseif ((strpos($pCoordinateString, ':') !== false) || (strpos($pCoordinateString, ',') !== false)) {
+            throw new Exception('Cell coordinate string can not be a range of cells');
+        } elseif ($pCoordinateString == '') {
+            throw new Exception('Cell coordinate can not be zero-length string');
+        }
+
+        throw new Exception('Invalid cell coordinate ' . $pCoordinateString);
+    }
+
+    /**
+     * Make string row, column or cell coordinate absolute.
+     *
+     * @param string $pCoordinateString e.g. 'A' or '1' or 'A1'
+     *                    Note that this value can be a row or column reference as well as a cell reference
+     *
+     * @throws Exception
+     *
+     * @return string Absolute coordinate        e.g. '$A' or '$1' or '$A$1'
+     */
+    public static function absoluteReference($pCoordinateString)
+    {
+        if (strpos($pCoordinateString, ':') === false && strpos($pCoordinateString, ',') === false) {
+            // Split out any worksheet name from the reference
+            $worksheet = '';
+            $cellAddress = explode('!', $pCoordinateString);
+            if (count($cellAddress) > 1) {
+                list($worksheet, $pCoordinateString) = $cellAddress;
+            }
+            if ($worksheet > '') {
+                $worksheet .= '!';
+            }
+
+            // Create absolute coordinate
+            if (ctype_digit($pCoordinateString)) {
+                return $worksheet . '$' . $pCoordinateString;
+            } elseif (ctype_alpha($pCoordinateString)) {
+                return $worksheet . '$' . strtoupper($pCoordinateString);
+            }
+
+            return $worksheet . self::absoluteCoordinate($pCoordinateString);
+        }
+
+        throw new Exception('Cell coordinate string can not be a range of cells');
+    }
+
+    /**
+     * Make string coordinate absolute.
+     *
+     * @param string $pCoordinateString e.g. 'A1'
+     *
+     * @throws Exception
+     *
+     * @return string Absolute coordinate        e.g. '$A$1'
+     */
+    public static function absoluteCoordinate($pCoordinateString)
+    {
+        if (strpos($pCoordinateString, ':') === false && strpos($pCoordinateString, ',') === false) {
+            // Split out any worksheet name from the coordinate
+            $worksheet = '';
+            $cellAddress = explode('!', $pCoordinateString);
+            if (count($cellAddress) > 1) {
+                list($worksheet, $pCoordinateString) = $cellAddress;
+            }
+            if ($worksheet > '') {
+                $worksheet .= '!';
+            }
+
+            // Create absolute coordinate
+            list($column, $row) = self::coordinateFromString($pCoordinateString);
+            $column = ltrim($column, '$');
+            $row = ltrim($row, '$');
+
+            return $worksheet . '$' . $column . '$' . $row;
+        }
+
+        throw new Exception('Cell coordinate string can not be a range of cells');
+    }
+
+    /**
+     * Split range into coordinate strings.
+     *
+     * @param string $pRange e.g. 'B4:D9' or 'B4:D9,H2:O11' or 'B4'
+     *
+     * @return array Array containg one or more arrays containing one or two coordinate strings
+     *                                e.g. array('B4','D9') or array(array('B4','D9'),array('H2','O11'))
+     *                                        or array('B4')
+     */
+    public static function splitRange($pRange)
+    {
+        // Ensure $pRange is a valid range
+        if (empty($pRange)) {
+            $pRange = self::DEFAULT_RANGE;
+        }
+
+        $exploded = explode(',', $pRange);
+        $counter = count($exploded);
+        for ($i = 0; $i < $counter; ++$i) {
+            $exploded[$i] = explode(':', $exploded[$i]);
+        }
+
+        return $exploded;
+    }
+
+    /**
+     * Build range from coordinate strings.
+     *
+     * @param array $pRange Array containg one or more arrays containing one or two coordinate strings
+     *
+     * @throws Exception
+     *
+     * @return string String representation of $pRange
+     */
+    public static function buildRange(array $pRange)
+    {
+        // Verify range
+        if (empty($pRange) || !is_array($pRange[0])) {
+            throw new Exception('Range does not contain any information');
+        }
+
+        // Build range
+        $imploded = [];
+        $counter = count($pRange);
+        for ($i = 0; $i < $counter; ++$i) {
+            $pRange[$i] = implode(':', $pRange[$i]);
+        }
+        $imploded = implode(',', $pRange);
+
+        return $imploded;
+    }
+
+    /**
+     * Calculate range boundaries.
+     *
+     * @param string $pRange Cell range (e.g. A1:A1)
+     *
+     * @return array Range coordinates array(Start Cell, End Cell)
+     *                    where Start Cell and End Cell are arrays (Column Number, Row Number)
+     */
+    public static function rangeBoundaries($pRange)
+    {
+        // Ensure $pRange is a valid range
+        if (empty($pRange)) {
+            $pRange = self::DEFAULT_RANGE;
+        }
+
+        // Uppercase coordinate
+        $pRange = strtoupper($pRange);
+
+        // Extract range
+        if (strpos($pRange, ':') === false) {
+            $rangeA = $rangeB = $pRange;
+        } else {
+            list($rangeA, $rangeB) = explode(':', $pRange);
+        }
+
+        // Calculate range outer borders
+        $rangeStart = self::coordinateFromString($rangeA);
+        $rangeEnd = self::coordinateFromString($rangeB);
+
+        // Translate column into index
+        $rangeStart[0] = self::columnIndexFromString($rangeStart[0]);
+        $rangeEnd[0] = self::columnIndexFromString($rangeEnd[0]);
+
+        return [$rangeStart, $rangeEnd];
+    }
+
+    /**
+     * Calculate range dimension.
+     *
+     * @param string $pRange Cell range (e.g. A1:A1)
+     *
+     * @return array Range dimension (width, height)
+     */
+    public static function rangeDimension($pRange)
+    {
+        // Calculate range outer borders
+        list($rangeStart, $rangeEnd) = self::rangeBoundaries($pRange);
+
+        return [($rangeEnd[0] - $rangeStart[0] + 1), ($rangeEnd[1] - $rangeStart[1] + 1)];
+    }
+
+    /**
+     * Calculate range boundaries.
+     *
+     * @param string $pRange Cell range (e.g. A1:A1)
+     *
+     * @return array Range coordinates array(Start Cell, End Cell)
+     *                    where Start Cell and End Cell are arrays (Column ID, Row Number)
+     */
+    public static function getRangeBoundaries($pRange)
+    {
+        // Ensure $pRange is a valid range
+        if (empty($pRange)) {
+            $pRange = self::DEFAULT_RANGE;
+        }
+
+        // Uppercase coordinate
+        $pRange = strtoupper($pRange);
+
+        // Extract range
+        if (strpos($pRange, ':') === false) {
+            $rangeA = $rangeB = $pRange;
+        } else {
+            list($rangeA, $rangeB) = explode(':', $pRange);
+        }
+
+        return [self::coordinateFromString($rangeA), self::coordinateFromString($rangeB)];
+    }
+
+    /**
+     * Column index from string.
+     *
+     * @param string $pString eg 'A'
+     *
+     * @return int Column index (base 1 !!!)
+     */
+    public static function columnIndexFromString($pString)
+    {
+        //    Using a lookup cache adds a slight memory overhead, but boosts speed
+        //    caching using a static within the method is faster than a class static,
+        //        though it's additional memory overhead
+        static $indexCache = [];
+
+        if (isset($indexCache[$pString])) {
+            return $indexCache[$pString];
+        }
+        //    It's surprising how costly the strtoupper() and ord() calls actually are, so we use a lookup array rather than use ord()
+        //        and make it case insensitive to get rid of the strtoupper() as well. Because it's a static, there's no significant
+        //        memory overhead either
+        static $columnLookup = [
+            'A' => 1, 'B' => 2, 'C' => 3, 'D' => 4, 'E' => 5, 'F' => 6, 'G' => 7, 'H' => 8, 'I' => 9, 'J' => 10, 'K' => 11, 'L' => 12, 'M' => 13,
+            'N' => 14, 'O' => 15, 'P' => 16, 'Q' => 17, 'R' => 18, 'S' => 19, 'T' => 20, 'U' => 21, 'V' => 22, 'W' => 23, 'X' => 24, 'Y' => 25, 'Z' => 26,
+            'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6, 'g' => 7, 'h' => 8, 'i' => 9, 'j' => 10, 'k' => 11, 'l' => 12, 'm' => 13,
+            'n' => 14, 'o' => 15, 'p' => 16, 'q' => 17, 'r' => 18, 's' => 19, 't' => 20, 'u' => 21, 'v' => 22, 'w' => 23, 'x' => 24, 'y' => 25, 'z' => 26,
+        ];
+
+        //    We also use the language construct isset() rather than the more costly strlen() function to match the length of $pString
+        //        for improved performance
+        if (isset($pString[0])) {
+            if (!isset($pString[1])) {
+                $indexCache[$pString] = $columnLookup[$pString];
+
+                return $indexCache[$pString];
+            } elseif (!isset($pString[2])) {
+                $indexCache[$pString] = $columnLookup[$pString[0]] * 26 + $columnLookup[$pString[1]];
+
+                return $indexCache[$pString];
+            } elseif (!isset($pString[3])) {
+                $indexCache[$pString] = $columnLookup[$pString[0]] * 676 + $columnLookup[$pString[1]] * 26 + $columnLookup[$pString[2]];
+
+                return $indexCache[$pString];
+            }
+        }
+
+        throw new Exception('Column string index can not be ' . ((isset($pString[0])) ? 'longer than 3 characters' : 'empty'));
+    }
+
+    /**
+     * String from columnindex.
+     *
+     * @param int $columnIndex Column index (A = 0)
+     *
+     * @return string
+     */
+    public static function stringFromColumnIndex($columnIndex)
+    {
+        static $indexCache = [];
+
+        if (!isset($indexCache[$columnIndex])) {
+            $indexValue = $columnIndex + 1;
+            $base26 = null;
+            do {
+                $characterValue = ($indexValue % 26) ?: 26;
+                $indexValue = ($indexValue - $characterValue) / 26;
+                $base26 = chr($characterValue + 64) . ($base26 ?: '');
+            } while ($indexValue > 0);
+            $indexCache[$columnIndex] = $base26;
+        }
+
+        return $indexCache[$columnIndex];
+    }
+
+    /**
+     * Extract all cell references in range.
+     *
+     * @param string $pRange Range (e.g. A1 or A1:C10 or A1:E10 A20:E25)
+     *
+     * @return array Array containing single cell references
+     */
+    public static function extractAllCellReferencesInRange($pRange)
+    {
+        // Returnvalue
+        $returnValue = [];
+
+        // Explode spaces
+        $cellBlocks = explode(' ', str_replace('$', '', strtoupper($pRange)));
+        foreach ($cellBlocks as $cellBlock) {
+            // Single cell?
+            if (strpos($cellBlock, ':') === false && strpos($cellBlock, ',') === false) {
+                $returnValue[] = $cellBlock;
+
+                continue;
+            }
+
+            // Range...
+            $ranges = self::splitRange($cellBlock);
+            foreach ($ranges as $range) {
+                // Single cell?
+                if (!isset($range[1])) {
+                    $returnValue[] = $range[0];
+
+                    continue;
+                }
+
+                // Range...
+                list($rangeStart, $rangeEnd) = $range;
+                sscanf($rangeStart, '%[A-Z]%d', $startCol, $startRow);
+                sscanf($rangeEnd, '%[A-Z]%d', $endCol, $endRow);
+                ++$endCol;
+
+                // Current data
+                $currentCol = $startCol;
+                $currentRow = $startRow;
+
+                // Loop cells
+                while ($currentCol != $endCol) {
+                    while ($currentRow <= $endRow) {
+                        $returnValue[] = $currentCol . $currentRow;
+                        ++$currentRow;
+                    }
+                    ++$currentCol;
+                    $currentRow = $startRow;
+                }
+            }
+        }
+
+        //    Sort the result by column and row
+        $sortKeys = [];
+        foreach (array_unique($returnValue) as $coord) {
+            sscanf($coord, '%[A-Z]%d', $column, $row);
+            $sortKeys[sprintf('%3s%09d', $column, $row)] = $coord;
+        }
+        ksort($sortKeys);
+
+        // Return value
+        return array_values($sortKeys);
+    }
+
+    /**
+     * Convert an associative array of single cell coordinates to values to an associative array
+     * of cell ranges to values.  Only adjacent cell coordinates with the same
+     * value will be merged.  If the value is an object, it must implement the method getHashCode().
+     *
+     * For example, this function converts:
+     *
+     *    [ 'A1' => 'x', 'A2' => 'x', 'A3' => 'x', 'A4' => 'y' ]
+     *
+     * to:
+     *
+     *    [ 'A1:A3' => 'x', 'A4' => 'y' ]
+     *
+     * @param array $pCoordCollection associative array mapping coordinates to values
+     *
+     * @return array associative array mapping coordinate ranges to valuea
+     */
+    public static function mergeRangesInCollection(array $pCoordCollection)
+    {
+        $hashedValues = [];
+
+        foreach ($pCoordCollection as $coord => $value) {
+            list($column, $row) = self::coordinateFromString($coord);
+            $row = (int) (ltrim($row, '$'));
+            $hashCode = $column . '-' . (is_object($value) ? $value->getHashCode() : $value);
+
+            if (!isset($hashedValues[$hashCode])) {
+                $hashedValues[$hashCode] = (object) [
+                    'value' => $value,
+                    'col' => $column,
+                    'rows' => [$row],
+                ];
+            } else {
+                $hashedValues[$hashCode]->rows[] = $row;
+            }
+        }
+
+        $mergedCoordCollection = [];
+        ksort($hashedValues);
+
+        foreach ($hashedValues as $hashedValue) {
+            sort($hashedValue->rows);
+            $rowStart = null;
+            $rowEnd = null;
+            $ranges = [];
+
+            foreach ($hashedValue->rows as $row) {
+                if ($rowStart === null) {
+                    $rowStart = $row;
+                    $rowEnd = $row;
+                } elseif ($rowEnd === $row - 1) {
+                    $rowEnd = $row;
+                } else {
+                    if ($rowStart == $rowEnd) {
+                        $ranges[] = $hashedValue->col . $rowStart;
+                    } else {
+                        $ranges[] = $hashedValue->col . $rowStart . ':' . $hashedValue->col . $rowEnd;
+                    }
+
+                    $rowStart = $row;
+                    $rowEnd = $row;
+                }
+            }
+
+            if ($rowStart !== null) {
+                if ($rowStart == $rowEnd) {
+                    $ranges[] = $hashedValue->col . $rowStart;
+                } else {
+                    $ranges[] = $hashedValue->col . $rowStart . ':' . $hashedValue->col . $rowEnd;
+                }
+            }
+
+            foreach ($ranges as $range) {
+                $mergedCoordCollection[$range] = $hashedValue->value;
+            }
+        }
+
+        return $mergedCoordCollection;
+    }
+}
diff --git a/src/PhpSpreadsheet/Chart/DataSeriesValues.php b/src/PhpSpreadsheet/Chart/DataSeriesValues.php
index 20a60ee8..3c0c6846 100644
--- a/src/PhpSpreadsheet/Chart/DataSeriesValues.php
+++ b/src/PhpSpreadsheet/Chart/DataSeriesValues.php
@@ -4,7 +4,7 @@ namespace PhpOffice\PhpSpreadsheet\Chart;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
 
 class DataSeriesValues
@@ -327,7 +327,7 @@ class DataSeriesValues
                     list(, $cellRange) = $cellRange;
                 }
 
-                $dimensions = Cell::rangeDimension(str_replace('$', '', $cellRange));
+                $dimensions = Coordinate::rangeDimension(str_replace('$', '', $cellRange));
                 if (($dimensions[0] == 1) || ($dimensions[1] == 1)) {
                     $this->dataValues = Functions::flattenArray($newDataValues);
                 } else {
diff --git a/src/PhpSpreadsheet/Collection/Cells.php b/src/PhpSpreadsheet/Collection/Cells.php
index 9c20e2c6..8e6fb917 100644
--- a/src/PhpSpreadsheet/Collection/Cells.php
+++ b/src/PhpSpreadsheet/Collection/Cells.php
@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet\Collection;
 
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
 use Psr\SimpleCache\CacheInterface;
@@ -244,10 +245,10 @@ class Cells
             if ($r != $row) {
                 continue;
             }
-            $columnList[] = Cell::columnIndexFromString($c);
+            $columnList[] = Coordinate::columnIndexFromString($c);
         }
 
-        return Cell::stringFromColumnIndex(max($columnList) - 1);
+        return Coordinate::stringFromColumnIndex(max($columnList) - 1);
     }
 
     /**
diff --git a/src/PhpSpreadsheet/Reader/Csv.php b/src/PhpSpreadsheet/Reader/Csv.php
index 5d6f1e98..388345c1 100644
--- a/src/PhpSpreadsheet/Reader/Csv.php
+++ b/src/PhpSpreadsheet/Reader/Csv.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Reader;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
@@ -251,7 +251,7 @@ class Csv extends BaseReader
             $worksheetInfo[0]['lastColumnIndex'] = max($worksheetInfo[0]['lastColumnIndex'], count($rowData) - 1);
         }
 
-        $worksheetInfo[0]['lastColumnLetter'] = Cell::stringFromColumnIndex($worksheetInfo[0]['lastColumnIndex']);
+        $worksheetInfo[0]['lastColumnLetter'] = Coordinate::stringFromColumnIndex($worksheetInfo[0]['lastColumnIndex']);
         $worksheetInfo[0]['totalColumns'] = $worksheetInfo[0]['lastColumnIndex'] + 1;
 
         // Close file
diff --git a/src/PhpSpreadsheet/Reader/Gnumeric.php b/src/PhpSpreadsheet/Reader/Gnumeric.php
index 0b70da6b..513246ce 100644
--- a/src/PhpSpreadsheet/Reader/Gnumeric.php
+++ b/src/PhpSpreadsheet/Reader/Gnumeric.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Reader;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\ReferenceHelper;
@@ -138,7 +138,7 @@ class Gnumeric extends BaseReader
                         break;
                     }
                 }
-                $tmpInfo['lastColumnLetter'] = Cell::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
+                $tmpInfo['lastColumnLetter'] = Coordinate::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
                 $worksheetInfo[] = $tmpInfo;
             }
         }
@@ -394,7 +394,7 @@ class Gnumeric extends BaseReader
                     $maxCol = $column;
                 }
 
-                $column = Cell::stringFromColumnIndex($column);
+                $column = Coordinate::stringFromColumnIndex($column);
 
                 // Read cell?
                 if ($this->getReadFilter() !== null) {
@@ -472,11 +472,11 @@ class Gnumeric extends BaseReader
                 $styleAttributes = $styleRegion->attributes();
                 if (($styleAttributes['startRow'] <= $maxRow) &&
                     ($styleAttributes['startCol'] <= $maxCol)) {
-                    $startColumn = Cell::stringFromColumnIndex((int) $styleAttributes['startCol']);
+                    $startColumn = Coordinate::stringFromColumnIndex((int) $styleAttributes['startCol']);
                     $startRow = $styleAttributes['startRow'] + 1;
 
                     $endColumn = ($styleAttributes['endCol'] > $maxCol) ? $maxCol : (int) $styleAttributes['endCol'];
-                    $endColumn = Cell::stringFromColumnIndex($endColumn);
+                    $endColumn = Coordinate::stringFromColumnIndex($endColumn);
                     $endRow = ($styleAttributes['endRow'] > $maxRow) ? $maxRow : $styleAttributes['endRow'];
                     $endRow += 1;
                     $cellRange = $startColumn . $startRow . ':' . $endColumn . $endRow;
@@ -718,19 +718,19 @@ class Gnumeric extends BaseReader
                     $hidden = ((isset($columnAttributes['Hidden'])) && ($columnAttributes['Hidden'] == '1')) ? true : false;
                     $columnCount = (isset($columnAttributes['Count'])) ? $columnAttributes['Count'] : 1;
                     while ($c < $column) {
-                        $spreadsheet->getActiveSheet()->getColumnDimension(Cell::stringFromColumnIndex($c))->setWidth($defaultWidth);
+                        $spreadsheet->getActiveSheet()->getColumnDimension(Coordinate::stringFromColumnIndex($c))->setWidth($defaultWidth);
                         ++$c;
                     }
                     while (($c < ($column + $columnCount)) && ($c <= $maxCol)) {
-                        $spreadsheet->getActiveSheet()->getColumnDimension(Cell::stringFromColumnIndex($c))->setWidth($columnWidth);
+                        $spreadsheet->getActiveSheet()->getColumnDimension(Coordinate::stringFromColumnIndex($c))->setWidth($columnWidth);
                         if ($hidden) {
-                            $spreadsheet->getActiveSheet()->getColumnDimension(Cell::stringFromColumnIndex($c))->setVisible(false);
+                            $spreadsheet->getActiveSheet()->getColumnDimension(Coordinate::stringFromColumnIndex($c))->setVisible(false);
                         }
                         ++$c;
                     }
                 }
                 while ($c <= $maxCol) {
-                    $spreadsheet->getActiveSheet()->getColumnDimension(Cell::stringFromColumnIndex($c))->setWidth($defaultWidth);
+                    $spreadsheet->getActiveSheet()->getColumnDimension(Coordinate::stringFromColumnIndex($c))->setWidth($defaultWidth);
                     ++$c;
                 }
             }
diff --git a/src/PhpSpreadsheet/Reader/Html.php b/src/PhpSpreadsheet/Reader/Html.php
index 44efa78a..5df8f49b 100644
--- a/src/PhpSpreadsheet/Reader/Html.php
+++ b/src/PhpSpreadsheet/Reader/Html.php
@@ -6,7 +6,7 @@ use DOMDocument;
 use DOMElement;
 use DOMNode;
 use DOMText;
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Style\Border;
 use PhpOffice\PhpSpreadsheet\Style\Color;
@@ -448,7 +448,7 @@ class Html extends BaseReader
                                 ++$columnTo;
                             }
                             $range = $column . $row . ':' . $columnTo . ($row + $attributeArray['rowspan'] - 1);
-                            foreach (Cell::extractAllCellReferencesInRange($range) as $value) {
+                            foreach (Coordinate::extractAllCellReferencesInRange($range) as $value) {
                                 $this->rowspan[$value] = true;
                             }
                             $sheet->mergeCells($range);
@@ -456,7 +456,7 @@ class Html extends BaseReader
                         } elseif (isset($attributeArray['rowspan'])) {
                             //create merging rowspan
                             $range = $column . $row . ':' . $column . ($row + $attributeArray['rowspan'] - 1);
-                            foreach (Cell::extractAllCellReferencesInRange($range) as $value) {
+                            foreach (Coordinate::extractAllCellReferencesInRange($range) as $value) {
                                 $this->rowspan[$value] = true;
                             }
                             $sheet->mergeCells($range);
diff --git a/src/PhpSpreadsheet/Reader/Ods.php b/src/PhpSpreadsheet/Reader/Ods.php
index b183a4f2..02050c96 100644
--- a/src/PhpSpreadsheet/Reader/Ods.php
+++ b/src/PhpSpreadsheet/Reader/Ods.php
@@ -5,7 +5,7 @@ namespace PhpOffice\PhpSpreadsheet\Reader;
 use DateTime;
 use DateTimeZone;
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Document\Properties;
 use PhpOffice\PhpSpreadsheet\RichText\RichText;
@@ -215,7 +215,7 @@ class Ods extends BaseReader
 
                     $tmpInfo['totalColumns'] = max($tmpInfo['totalColumns'], $currCells);
                     $tmpInfo['lastColumnIndex'] = $tmpInfo['totalColumns'] - 1;
-                    $tmpInfo['lastColumnLetter'] = Cell::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
+                    $tmpInfo['lastColumnLetter'] = Coordinate::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
                     $worksheetInfo[] = $tmpInfo;
                 }
             }
@@ -703,11 +703,11 @@ class Ods extends BaseReader
                                         $columnTo = $columnID;
 
                                         if ($cellData->hasAttributeNS($tableNs, 'number-columns-spanned')) {
-                                            $columnIndex = Cell::columnIndexFromString($columnID);
+                                            $columnIndex = Coordinate::columnIndexFromString($columnID);
                                             $columnIndex += (int) $cellData->getAttributeNS($tableNs, 'number-columns-spanned');
                                             $columnIndex -= 2;
 
-                                            $columnTo = Cell::stringFromColumnIndex($columnIndex);
+                                            $columnTo = Coordinate::stringFromColumnIndex($columnIndex);
                                         }
 
                                         $rowTo = $rowID;
diff --git a/src/PhpSpreadsheet/Reader/Slk.php b/src/PhpSpreadsheet/Reader/Slk.php
index 47dbab43..d9d1178b 100644
--- a/src/PhpSpreadsheet/Reader/Slk.php
+++ b/src/PhpSpreadsheet/Reader/Slk.php
@@ -3,7 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet\Reader;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Style\Border;
@@ -161,7 +161,7 @@ class Slk extends BaseReader
             }
         }
 
-        $worksheetInfo[0]['lastColumnLetter'] = Cell::stringFromColumnIndex($worksheetInfo[0]['lastColumnIndex']);
+        $worksheetInfo[0]['lastColumnLetter'] = Coordinate::stringFromColumnIndex($worksheetInfo[0]['lastColumnIndex']);
         $worksheetInfo[0]['totalColumns'] = $worksheetInfo[0]['lastColumnIndex'] + 1;
 
         // Close file
@@ -337,7 +337,7 @@ class Slk extends BaseReader
                                         if ($columnReference[0] == '[') {
                                             $columnReference = $column + trim($columnReference, '[]');
                                         }
-                                        $A1CellReference = Cell::stringFromColumnIndex($columnReference - 1) . $rowReference;
+                                        $A1CellReference = Coordinate::stringFromColumnIndex($columnReference - 1) . $rowReference;
 
                                         $value = substr_replace($value, $A1CellReference, $cellReference[0][1], strlen($cellReference[0][0]));
                                     }
@@ -351,7 +351,7 @@ class Slk extends BaseReader
                             break;
                     }
                 }
-                $columnLetter = Cell::stringFromColumnIndex($column - 1);
+                $columnLetter = Coordinate::stringFromColumnIndex($column - 1);
                 $cellData = Calculation::unwrapResult($cellData);
 
                 // Set cell value
@@ -419,22 +419,22 @@ class Slk extends BaseReader
                     }
                 }
                 if (($formatStyle > '') && ($column > '') && ($row > '')) {
-                    $columnLetter = Cell::stringFromColumnIndex($column - 1);
+                    $columnLetter = Coordinate::stringFromColumnIndex($column - 1);
                     if (isset($this->formats[$formatStyle])) {
                         $spreadsheet->getActiveSheet()->getStyle($columnLetter . $row)->applyFromArray($this->formats[$formatStyle]);
                     }
                 }
                 if ((!empty($styleData)) && ($column > '') && ($row > '')) {
-                    $columnLetter = Cell::stringFromColumnIndex($column - 1);
+                    $columnLetter = Coordinate::stringFromColumnIndex($column - 1);
                     $spreadsheet->getActiveSheet()->getStyle($columnLetter . $row)->applyFromArray($styleData);
                 }
                 if ($columnWidth > '') {
                     if ($startCol == $endCol) {
-                        $startCol = Cell::stringFromColumnIndex($startCol - 1);
+                        $startCol = Coordinate::stringFromColumnIndex($startCol - 1);
                         $spreadsheet->getActiveSheet()->getColumnDimension($startCol)->setWidth($columnWidth);
                     } else {
-                        $startCol = Cell::stringFromColumnIndex($startCol - 1);
-                        $endCol = Cell::stringFromColumnIndex($endCol - 1);
+                        $startCol = Coordinate::stringFromColumnIndex($startCol - 1);
+                        $endCol = Coordinate::stringFromColumnIndex($endCol - 1);
                         $spreadsheet->getActiveSheet()->getColumnDimension($startCol)->setWidth($columnWidth);
                         do {
                             $spreadsheet->getActiveSheet()->getColumnDimension(++$startCol)->setWidth($columnWidth);
diff --git a/src/PhpSpreadsheet/Reader/Xls.php b/src/PhpSpreadsheet/Reader/Xls.php
index ba8ddd27..443fc705 100644
--- a/src/PhpSpreadsheet/Reader/Xls.php
+++ b/src/PhpSpreadsheet/Reader/Xls.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Reader;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Cell\DataValidation;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
@@ -602,7 +602,7 @@ class Xls extends BaseReader
                 }
             }
 
-            $tmpInfo['lastColumnLetter'] = Cell::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
+            $tmpInfo['lastColumnLetter'] = Coordinate::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
             $tmpInfo['totalColumns'] = $tmpInfo['lastColumnIndex'] + 1;
 
             $worksheetInfo[] = $tmpInfo;
@@ -1087,8 +1087,8 @@ class Xls extends BaseReader
                     }
 
                     // calculate the width and height of the shape
-                    list($startColumn, $startRow) = Cell::coordinateFromString($spContainer->getStartCoordinates());
-                    list($endColumn, $endRow) = Cell::coordinateFromString($spContainer->getEndCoordinates());
+                    list($startColumn, $startRow) = Coordinate::coordinateFromString($spContainer->getStartCoordinates());
+                    list($endColumn, $endRow) = Coordinate::coordinateFromString($spContainer->getEndCoordinates());
 
                     $startOffsetX = $spContainer->getStartOffsetX();
                     $startOffsetY = $spContainer->getStartOffsetY();
@@ -1173,7 +1173,7 @@ class Xls extends BaseReader
             // treat SHAREDFMLA records
             if ($this->version == self::XLS_BIFF8) {
                 foreach ($this->sharedFormulaParts as $cell => $baseCell) {
-                    list($column, $row) = Cell::coordinateFromString($cell);
+                    list($column, $row) = Coordinate::coordinateFromString($cell);
                     if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($column, $row, $this->phpSheet->getTitle())) {
                         $formula = $this->getFormulaFromStructure($this->sharedFormulas[$baseCell], $cell);
                         $this->phpSheet->getCell($cell)->setValueExplicit('=' . $formula, DataType::TYPE_FORMULA);
@@ -1249,8 +1249,8 @@ class Xls extends BaseReader
 
                                     $coordinateStrings = explode(':', $extractedRange);
                                     if (count($coordinateStrings) == 2) {
-                                        list($firstColumn, $firstRow) = Cell::coordinateFromString($coordinateStrings[0]);
-                                        list($lastColumn, $lastRow) = Cell::coordinateFromString($coordinateStrings[1]);
+                                        list($firstColumn, $firstRow) = Coordinate::coordinateFromString($coordinateStrings[0]);
+                                        list($lastColumn, $lastRow) = Coordinate::coordinateFromString($coordinateStrings[1]);
 
                                         if ($firstColumn == 'A' and $lastColumn == 'IV') {
                                             // then we have repeating rows
@@ -3723,7 +3723,7 @@ class Xls extends BaseReader
 
         // offset: 2; size: 2; index to column
         $column = self::getUInt2d($recordData, 2);
-        $columnString = Cell::stringFromColumnIndex($column);
+        $columnString = Coordinate::stringFromColumnIndex($column);
 
         // Read cell?
         if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->phpSheet->getTitle())) {
@@ -3767,7 +3767,7 @@ class Xls extends BaseReader
 
         // offset: 2; size: 2; index to column
         $column = self::getUInt2d($recordData, 2);
-        $columnString = Cell::stringFromColumnIndex($column);
+        $columnString = Coordinate::stringFromColumnIndex($column);
 
         $emptyCell = true;
         // Read cell?
@@ -3860,7 +3860,7 @@ class Xls extends BaseReader
         $offset = 4;
 
         for ($i = 0; $i < $columns; ++$i) {
-            $columnString = Cell::stringFromColumnIndex($colFirst + $i);
+            $columnString = Coordinate::stringFromColumnIndex($colFirst + $i);
 
             // Read cell?
             if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->phpSheet->getTitle())) {
@@ -3904,7 +3904,7 @@ class Xls extends BaseReader
 
         // offset: 2; size 2; index to column
         $column = self::getUInt2d($recordData, 2);
-        $columnString = Cell::stringFromColumnIndex($column);
+        $columnString = Coordinate::stringFromColumnIndex($column);
 
         // Read cell?
         if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->phpSheet->getTitle())) {
@@ -3945,7 +3945,7 @@ class Xls extends BaseReader
 
         // offset: 2; size: 2; col index
         $column = self::getUInt2d($recordData, 2);
-        $columnString = Cell::stringFromColumnIndex($column);
+        $columnString = Coordinate::stringFromColumnIndex($column);
 
         // offset: 20: size: variable; formula structure
         $formulaStructure = substr($recordData, 20);
@@ -3969,7 +3969,7 @@ class Xls extends BaseReader
             // get the base cell, grab tExp token
             $baseRow = self::getUInt2d($formulaStructure, 3);
             $baseCol = self::getUInt2d($formulaStructure, 5);
-            $this->baseCell = Cell::stringFromColumnIndex($baseCol) . ($baseRow + 1);
+            $this->baseCell = Coordinate::stringFromColumnIndex($baseCol) . ($baseRow + 1);
         }
 
         // Read cell?
@@ -4129,7 +4129,7 @@ class Xls extends BaseReader
 
         // offset: 2; size: 2; column index
         $column = self::getUInt2d($recordData, 2);
-        $columnString = Cell::stringFromColumnIndex($column);
+        $columnString = Coordinate::stringFromColumnIndex($column);
 
         // Read cell?
         if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->phpSheet->getTitle())) {
@@ -4193,7 +4193,7 @@ class Xls extends BaseReader
         // add style information
         if (!$this->readDataOnly && $this->readEmptyCells) {
             for ($i = 0; $i < $length / 2 - 3; ++$i) {
-                $columnString = Cell::stringFromColumnIndex($fc + $i);
+                $columnString = Coordinate::stringFromColumnIndex($fc + $i);
 
                 // Read cell?
                 if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->phpSheet->getTitle())) {
@@ -4229,7 +4229,7 @@ class Xls extends BaseReader
 
         // offset: 2; size: 2; index to column
         $column = self::getUInt2d($recordData, 2);
-        $columnString = Cell::stringFromColumnIndex($column);
+        $columnString = Coordinate::stringFromColumnIndex($column);
 
         // Read cell?
         if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->phpSheet->getTitle())) {
@@ -4273,7 +4273,7 @@ class Xls extends BaseReader
 
         // offset: 2; size: 2; col index
         $col = self::getUInt2d($recordData, 2);
-        $columnString = Cell::stringFromColumnIndex($col);
+        $columnString = Coordinate::stringFromColumnIndex($col);
 
         // Read cell?
         if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->phpSheet->getTitle())) {
@@ -4490,7 +4490,7 @@ class Xls extends BaseReader
 
             if ($this->frozen) {
                 // frozen panes
-                $this->phpSheet->freezePane(Cell::stringFromColumnIndex($px) . ($py + 1));
+                $this->phpSheet->freezePane(Coordinate::stringFromColumnIndex($px) . ($py + 1));
             }
             // unfrozen panes; split windows; not supported by PhpSpreadsheet core
         }
@@ -4551,7 +4551,7 @@ class Xls extends BaseReader
         $includeCellRange = true;
         if ($this->getReadFilter() !== null) {
             $includeCellRange = false;
-            $rangeBoundaries = Cell::getRangeBoundaries($cellRangeAddress);
+            $rangeBoundaries = Coordinate::getRangeBoundaries($cellRangeAddress);
             ++$rangeBoundaries[1][0];
             for ($row = $rangeBoundaries[0][1]; $row <= $rangeBoundaries[1][1]; ++$row) {
                 for ($column = $rangeBoundaries[0][0]; $column != $rangeBoundaries[1][0]; ++$column) {
@@ -4762,7 +4762,7 @@ class Xls extends BaseReader
             }
 
             // apply the hyperlink to all the relevant cells
-            foreach (Cell::extractAllCellReferencesInRange($cellRange) as $coordinate) {
+            foreach (Coordinate::extractAllCellReferencesInRange($cellRange) as $coordinate) {
                 $this->phpSheet->getCell($coordinate)->getHyperLink()->setUrl($url);
             }
         }
@@ -4971,7 +4971,7 @@ class Xls extends BaseReader
 
         foreach ($cellRangeAddresses as $cellRange) {
             $stRange = $this->phpSheet->shrinkRangeToFit($cellRange);
-            foreach (Cell::extractAllCellReferencesInRange($stRange) as $coordinate) {
+            foreach (Coordinate::extractAllCellReferencesInRange($stRange) as $coordinate) {
                 $objValidation = $this->phpSheet->getCell($coordinate)->getDataValidation();
                 $objValidation->setType($type);
                 $objValidation->setErrorStyle($errorStyle);
@@ -7103,7 +7103,7 @@ class Xls extends BaseReader
 
         // offset: 2; size: 2; index to column or column offset + relative flags
         // bit: 7-0; mask 0x00FF; column index
-        $column = Cell::stringFromColumnIndex(0x00FF & self::getUInt2d($cellAddressStructure, 2));
+        $column = Coordinate::stringFromColumnIndex(0x00FF & self::getUInt2d($cellAddressStructure, 2));
 
         // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
         if (!(0x4000 & self::getUInt2d($cellAddressStructure, 2))) {
@@ -7129,8 +7129,8 @@ class Xls extends BaseReader
      */
     private function readBIFF8CellAddressB($cellAddressStructure, $baseCell = 'A1')
     {
-        list($baseCol, $baseRow) = Cell::coordinateFromString($baseCell);
-        $baseCol = Cell::columnIndexFromString($baseCol) - 1;
+        list($baseCol, $baseRow) = Coordinate::coordinateFromString($baseCell);
+        $baseCol = Coordinate::columnIndexFromString($baseCol) - 1;
 
         // offset: 0; size: 2; index to row (0... 65535) (or offset (-32768... 32767))
         $rowIndex = self::getUInt2d($cellAddressStructure, 0);
@@ -7142,7 +7142,7 @@ class Xls extends BaseReader
             // bit: 7-0; mask 0x00FF; column index
             $colIndex = 0x00FF & self::getUInt2d($cellAddressStructure, 2);
 
-            $column = Cell::stringFromColumnIndex($colIndex);
+            $column = Coordinate::stringFromColumnIndex($colIndex);
             $column = '$' . $column;
         } else {
             // offset: 2; size: 2; index to column or column offset + relative flags
@@ -7151,7 +7151,7 @@ class Xls extends BaseReader
             $colIndex = $baseCol + $relativeColIndex;
             $colIndex = ($colIndex < 256) ? $colIndex : $colIndex - 256;
             $colIndex = ($colIndex >= 0) ? $colIndex : $colIndex + 256;
-            $column = Cell::stringFromColumnIndex($colIndex);
+            $column = Coordinate::stringFromColumnIndex($colIndex);
         }
 
         // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
@@ -7196,8 +7196,8 @@ class Xls extends BaseReader
         }
 
         // column index to letter
-        $fc = Cell::stringFromColumnIndex($fc);
-        $lc = Cell::stringFromColumnIndex($lc);
+        $fc = Coordinate::stringFromColumnIndex($fc);
+        $lc = Coordinate::stringFromColumnIndex($lc);
 
         if ($fr == $lr and $fc == $lc) {
             return "$fc$fr";
@@ -7237,8 +7237,8 @@ class Xls extends BaseReader
         }
 
         // column index to letter
-        $fc = Cell::stringFromColumnIndex($fc);
-        $lc = Cell::stringFromColumnIndex($lc);
+        $fc = Coordinate::stringFromColumnIndex($fc);
+        $lc = Coordinate::stringFromColumnIndex($lc);
 
         if ($fr == $lr and $fc == $lc) {
             return "$fc$fr";
@@ -7270,7 +7270,7 @@ class Xls extends BaseReader
         // offset: 4; size: 2; index to first column or column offset + relative flags
 
         // bit: 7-0; mask 0x00FF; column index
-        $fc = Cell::stringFromColumnIndex(0x00FF & self::getUInt2d($subData, 4));
+        $fc = Coordinate::stringFromColumnIndex(0x00FF & self::getUInt2d($subData, 4));
 
         // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
         if (!(0x4000 & self::getUInt2d($subData, 4))) {
@@ -7285,7 +7285,7 @@ class Xls extends BaseReader
         // offset: 6; size: 2; index to last column or column offset + relative flags
 
         // bit: 7-0; mask 0x00FF; column index
-        $lc = Cell::stringFromColumnIndex(0x00FF & self::getUInt2d($subData, 6));
+        $lc = Coordinate::stringFromColumnIndex(0x00FF & self::getUInt2d($subData, 6));
 
         // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
         if (!(0x4000 & self::getUInt2d($subData, 6))) {
@@ -7312,8 +7312,8 @@ class Xls extends BaseReader
      */
     private function readBIFF8CellRangeAddressB($subData, $baseCell = 'A1')
     {
-        list($baseCol, $baseRow) = Cell::coordinateFromString($baseCell);
-        $baseCol = Cell::columnIndexFromString($baseCol) - 1;
+        list($baseCol, $baseRow) = Coordinate::coordinateFromString($baseCell);
+        $baseCol = Coordinate::columnIndexFromString($baseCol) - 1;
 
         // TODO: if cell range is just a single cell, should this funciton
         // not just return e.g. 'A1' and not 'A1:A1' ?
@@ -7330,7 +7330,7 @@ class Xls extends BaseReader
             // offset: 4; size: 2; first column with relative/absolute flags
             // bit: 7-0; mask 0x00FF; column index
             $fcIndex = 0x00FF & self::getUInt2d($subData, 4);
-            $fc = Cell::stringFromColumnIndex($fcIndex);
+            $fc = Coordinate::stringFromColumnIndex($fcIndex);
             $fc = '$' . $fc;
         } else {
             // column offset
@@ -7340,7 +7340,7 @@ class Xls extends BaseReader
             $fcIndex = $baseCol + $relativeFcIndex;
             $fcIndex = ($fcIndex < 256) ? $fcIndex : $fcIndex - 256;
             $fcIndex = ($fcIndex >= 0) ? $fcIndex : $fcIndex + 256;
-            $fc = Cell::stringFromColumnIndex($fcIndex);
+            $fc = Coordinate::stringFromColumnIndex($fcIndex);
         }
 
         // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
@@ -7360,7 +7360,7 @@ class Xls extends BaseReader
             // offset: 6; size: 2; last column with relative/absolute flags
             // bit: 7-0; mask 0x00FF; column index
             $lcIndex = 0x00FF & self::getUInt2d($subData, 6);
-            $lc = Cell::stringFromColumnIndex($lcIndex);
+            $lc = Coordinate::stringFromColumnIndex($lcIndex);
             $lc = '$' . $lc;
         } else {
             // column offset
@@ -7370,7 +7370,7 @@ class Xls extends BaseReader
             $lcIndex = $baseCol + $relativeLcIndex;
             $lcIndex = ($lcIndex < 256) ? $lcIndex : $lcIndex - 256;
             $lcIndex = ($lcIndex >= 0) ? $lcIndex : $lcIndex + 256;
-            $lc = Cell::stringFromColumnIndex($lcIndex);
+            $lc = Coordinate::stringFromColumnIndex($lcIndex);
         }
 
         // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
diff --git a/src/PhpSpreadsheet/Reader/Xls/Escher.php b/src/PhpSpreadsheet/Reader/Xls/Escher.php
index 843f8fb4..941618e0 100644
--- a/src/PhpSpreadsheet/Reader/Xls/Escher.php
+++ b/src/PhpSpreadsheet/Reader/Xls/Escher.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Reader\Xls;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Reader\Xls;
 use PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer;
 use PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer\SpgrContainer;
@@ -598,7 +598,7 @@ class Escher
         $endOffsetY = Xls::getUInt2d($recordData, 16);
 
         // set the start coordinates
-        $this->object->setStartCoordinates(Cell::stringFromColumnIndex($c1) . ($r1 + 1));
+        $this->object->setStartCoordinates(Coordinate::stringFromColumnIndex($c1) . ($r1 + 1));
 
         // set the start offsetX
         $this->object->setStartOffsetX($startOffsetX);
@@ -607,7 +607,7 @@ class Escher
         $this->object->setStartOffsetY($startOffsetY);
 
         // set the end coordinates
-        $this->object->setEndCoordinates(Cell::stringFromColumnIndex($c2) . ($r2 + 1));
+        $this->object->setEndCoordinates(Coordinate::stringFromColumnIndex($c2) . ($r2 + 1));
 
         // set the end offsetX
         $this->object->setEndOffsetX($endOffsetX);
diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
index 5d6c574a..3870498d 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Reader;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Document\Properties;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Reader\Xlsx\Chart;
@@ -230,7 +230,7 @@ class Xlsx extends BaseReader
                         $xml->close();
 
                         $tmpInfo['lastColumnIndex'] = $tmpInfo['totalColumns'] - 1;
-                        $tmpInfo['lastColumnLetter'] = Cell::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
+                        $tmpInfo['lastColumnLetter'] = Coordinate::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
 
                         $worksheetInfo[] = $tmpInfo;
                     }
@@ -278,11 +278,11 @@ class Xlsx extends BaseReader
             if (!isset($sharedFormulas[(string) $c->f['si']])) {
                 $sharedFormulas[$instance] = ['master' => $r, 'formula' => $value];
             } else {
-                $master = Cell::coordinateFromString($sharedFormulas[$instance]['master']);
-                $current = Cell::coordinateFromString($r);
+                $master = Coordinate::coordinateFromString($sharedFormulas[$instance]['master']);
+                $current = Coordinate::coordinateFromString($r);
 
                 $difference = [0, 0];
-                $difference[0] = Cell::columnIndexFromString($current[0]) - Cell::columnIndexFromString($master[0]);
+                $difference[0] = Coordinate::columnIndexFromString($current[0]) - Coordinate::columnIndexFromString($master[0]);
                 $difference[1] = $current[1] - $master[1];
 
                 $value = $this->referenceHelper->updateFormulaReferences($sharedFormulas[$instance]['formula'], 'A1', $difference[0], $difference[1]);
@@ -800,18 +800,18 @@ class Xlsx extends BaseReader
                                 foreach ($xmlSheet->cols->col as $col) {
                                     for ($i = (int) ($col['min']) - 1; $i < (int) ($col['max']); ++$i) {
                                         if ($col['style'] && !$this->readDataOnly) {
-                                            $docSheet->getColumnDimension(Cell::stringFromColumnIndex($i))->setXfIndex((int) ($col['style']));
+                                            $docSheet->getColumnDimension(Coordinate::stringFromColumnIndex($i))->setXfIndex((int) ($col['style']));
                                         }
                                         if (self::boolean($col['hidden'])) {
-                                            $docSheet->getColumnDimension(Cell::stringFromColumnIndex($i))->setVisible(false);
+                                            $docSheet->getColumnDimension(Coordinate::stringFromColumnIndex($i))->setVisible(false);
                                         }
                                         if (self::boolean($col['collapsed'])) {
-                                            $docSheet->getColumnDimension(Cell::stringFromColumnIndex($i))->setCollapsed(true);
+                                            $docSheet->getColumnDimension(Coordinate::stringFromColumnIndex($i))->setCollapsed(true);
                                         }
                                         if ($col['outlineLevel'] > 0) {
-                                            $docSheet->getColumnDimension(Cell::stringFromColumnIndex($i))->setOutlineLevel((int) ($col['outlineLevel']));
+                                            $docSheet->getColumnDimension(Coordinate::stringFromColumnIndex($i))->setOutlineLevel((int) ($col['outlineLevel']));
                                         }
-                                        $docSheet->getColumnDimension(Cell::stringFromColumnIndex($i))->setWidth((float) ($col['width']));
+                                        $docSheet->getColumnDimension(Coordinate::stringFromColumnIndex($i))->setWidth((float) ($col['width']));
 
                                         if ((int) ($col['max']) == 16384) {
                                             break;
@@ -858,7 +858,7 @@ class Xlsx extends BaseReader
                                     foreach ($row->c as $c) {
                                         $r = (string) $c['r'];
                                         if ($r == '') {
-                                            $r = Cell::stringFromColumnIndex($rowIndex) . $cIndex;
+                                            $r = Coordinate::stringFromColumnIndex($rowIndex) . $cIndex;
                                         }
                                         $cellDataType = (string) $c['t'];
                                         $value = null;
@@ -866,7 +866,7 @@ class Xlsx extends BaseReader
 
                                         // Read cell?
                                         if ($this->getReadFilter() !== null) {
-                                            $coordinates = Cell::coordinateFromString($r);
+                                            $coordinates = Coordinate::coordinateFromString($r);
 
                                             if (!$this->getReadFilter()->readCell($coordinates[0], $coordinates[1], $docSheet->getTitle())) {
                                                 continue;
@@ -1214,7 +1214,7 @@ class Xlsx extends BaseReader
                             if ($xmlSheet && $xmlSheet->colBreaks && $xmlSheet->colBreaks->brk && !$this->readDataOnly) {
                                 foreach ($xmlSheet->colBreaks->brk as $brk) {
                                     if ($brk['man']) {
-                                        $docSheet->setBreak(Cell::stringFromColumnIndex((string) $brk['id']) . '1', Worksheet::BREAK_COLUMN);
+                                        $docSheet->setBreak(Coordinate::stringFromColumnIndex((string) $brk['id']) . '1', Worksheet::BREAK_COLUMN);
                                     }
                                 }
                             }
@@ -1228,7 +1228,7 @@ class Xlsx extends BaseReader
                                         $stRange = $docSheet->shrinkRangeToFit($range);
 
                                         // Extract all cell references in $range
-                                        foreach (Cell::extractAllCellReferencesInRange($stRange) as $reference) {
+                                        foreach (Coordinate::extractAllCellReferencesInRange($stRange) as $reference) {
                                             // Create validation
                                             $docValidation = $docSheet->getCell($reference)->getDataValidation();
                                             $docValidation->setType((string) $dataValidation['type']);
@@ -1276,7 +1276,7 @@ class Xlsx extends BaseReader
                                         // Link url
                                         $linkRel = $hyperlink->attributes('http://schemas.openxmlformats.org/officeDocument/2006/relationships');
 
-                                        foreach (Cell::extractAllCellReferencesInRange($hyperlink['ref']) as $cellReference) {
+                                        foreach (Coordinate::extractAllCellReferencesInRange($hyperlink['ref']) as $cellReference) {
                                             $cell = $docSheet->getCell($cellReference);
                                             if (isset($linkRel['id'])) {
                                                 $hyperlinkUrl = $hyperlinks[(string) $linkRel['id']];
@@ -1568,7 +1568,7 @@ class Xlsx extends BaseReader
                                                         )],
                                                         false
                                                     );
-                                                    $objDrawing->setCoordinates(Cell::stringFromColumnIndex((string) $oneCellAnchor->from->col) . ($oneCellAnchor->from->row + 1));
+                                                    $objDrawing->setCoordinates(Coordinate::stringFromColumnIndex((string) $oneCellAnchor->from->col) . ($oneCellAnchor->from->row + 1));
                                                     $objDrawing->setOffsetX(Drawing::EMUToPixels($oneCellAnchor->from->colOff));
                                                     $objDrawing->setOffsetY(Drawing::EMUToPixels($oneCellAnchor->from->rowOff));
                                                     $objDrawing->setResizeProportional(false);
@@ -1590,7 +1590,7 @@ class Xlsx extends BaseReader
                                                     $objDrawing->setWorksheet($docSheet);
                                                 } else {
                                                     //    ? Can charts be positioned with a oneCellAnchor ?
-                                                    $coordinates = Cell::stringFromColumnIndex((string) $oneCellAnchor->from->col) . ($oneCellAnchor->from->row + 1);
+                                                    $coordinates = Coordinate::stringFromColumnIndex((string) $oneCellAnchor->from->col) . ($oneCellAnchor->from->row + 1);
                                                     $offsetX = Drawing::EMUToPixels($oneCellAnchor->from->colOff);
                                                     $offsetY = Drawing::EMUToPixels($oneCellAnchor->from->rowOff);
                                                     $width = Drawing::EMUToPixels(self::getArrayItem($oneCellAnchor->ext->attributes(), 'cx'));
@@ -1615,7 +1615,7 @@ class Xlsx extends BaseReader
                                                         )],
                                                         false
                                                     );
-                                                    $objDrawing->setCoordinates(Cell::stringFromColumnIndex((string) $twoCellAnchor->from->col) . ($twoCellAnchor->from->row + 1));
+                                                    $objDrawing->setCoordinates(Coordinate::stringFromColumnIndex((string) $twoCellAnchor->from->col) . ($twoCellAnchor->from->row + 1));
                                                     $objDrawing->setOffsetX(Drawing::EMUToPixels($twoCellAnchor->from->colOff));
                                                     $objDrawing->setOffsetY(Drawing::EMUToPixels($twoCellAnchor->from->rowOff));
                                                     $objDrawing->setResizeProportional(false);
@@ -1637,10 +1637,10 @@ class Xlsx extends BaseReader
                                                     }
                                                     $objDrawing->setWorksheet($docSheet);
                                                 } elseif (($this->includeCharts) && ($twoCellAnchor->graphicFrame)) {
-                                                    $fromCoordinate = Cell::stringFromColumnIndex((string) $twoCellAnchor->from->col) . ($twoCellAnchor->from->row + 1);
+                                                    $fromCoordinate = Coordinate::stringFromColumnIndex((string) $twoCellAnchor->from->col) . ($twoCellAnchor->from->row + 1);
                                                     $fromOffsetX = Drawing::EMUToPixels($twoCellAnchor->from->colOff);
                                                     $fromOffsetY = Drawing::EMUToPixels($twoCellAnchor->from->rowOff);
-                                                    $toCoordinate = Cell::stringFromColumnIndex((string) $twoCellAnchor->to->col) . ($twoCellAnchor->to->row + 1);
+                                                    $toCoordinate = Coordinate::stringFromColumnIndex((string) $twoCellAnchor->to->col) . ($twoCellAnchor->to->row + 1);
                                                     $toOffsetX = Drawing::EMUToPixels($twoCellAnchor->to->colOff);
                                                     $toOffsetY = Drawing::EMUToPixels($twoCellAnchor->to->rowOff);
                                                     $graphic = $twoCellAnchor->graphicFrame->children('http://schemas.openxmlformats.org/drawingml/2006/main')->graphic;
diff --git a/src/PhpSpreadsheet/Reader/Xml.php b/src/PhpSpreadsheet/Reader/Xml.php
index 9b60f27a..c08a84a7 100644
--- a/src/PhpSpreadsheet/Reader/Xml.php
+++ b/src/PhpSpreadsheet/Reader/Xml.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Reader;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Document\Properties;
 use PhpOffice\PhpSpreadsheet\RichText\RichText;
@@ -207,7 +207,7 @@ class Xml extends BaseReader
                 }
             }
 
-            $tmpInfo['lastColumnLetter'] = Cell::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
+            $tmpInfo['lastColumnLetter'] = Coordinate::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
             $tmpInfo['totalColumns'] = $tmpInfo['lastColumnIndex'] + 1;
 
             $worksheetInfo[] = $tmpInfo;
@@ -587,7 +587,7 @@ class Xml extends BaseReader
                 foreach ($worksheet->Table->Column as $columnData) {
                     $columnData_ss = $columnData->attributes($namespaces['ss']);
                     if (isset($columnData_ss['Index'])) {
-                        $columnID = Cell::stringFromColumnIndex($columnData_ss['Index'] - 1);
+                        $columnID = Coordinate::stringFromColumnIndex($columnData_ss['Index'] - 1);
                     }
                     if (isset($columnData_ss['Width'])) {
                         $columnWidth = $columnData_ss['Width'];
@@ -611,7 +611,7 @@ class Xml extends BaseReader
                     foreach ($rowData->Cell as $cell) {
                         $cell_ss = $cell->attributes($namespaces['ss']);
                         if (isset($cell_ss['Index'])) {
-                            $columnID = Cell::stringFromColumnIndex($cell_ss['Index'] - 1);
+                            $columnID = Coordinate::stringFromColumnIndex($cell_ss['Index'] - 1);
                         }
                         $cellRange = $columnID . $rowID;
 
@@ -631,7 +631,7 @@ class Xml extends BaseReader
                             $columnTo = $columnID;
                             if (isset($cell_ss['MergeAcross'])) {
                                 $additionalMergedCells += (int) $cell_ss['MergeAcross'];
-                                $columnTo = Cell::stringFromColumnIndex(Cell::columnIndexFromString($columnID) + $cell_ss['MergeAcross'] - 1);
+                                $columnTo = Coordinate::stringFromColumnIndex(Coordinate::columnIndexFromString($columnID) + $cell_ss['MergeAcross'] - 1);
                             }
                             $rowTo = $rowID;
                             if (isset($cell_ss['MergeDown'])) {
@@ -695,7 +695,7 @@ class Xml extends BaseReader
 
                             if ($hasCalculatedValue) {
                                 $type = DataType::TYPE_FORMULA;
-                                $columnNumber = Cell::columnIndexFromString($columnID);
+                                $columnNumber = Coordinate::columnIndexFromString($columnID);
                                 if (substr($cellDataFormula, 0, 3) == 'of:') {
                                     $cellDataFormula = substr($cellDataFormula, 3);
                                     $temp = explode('"', $cellDataFormula);
@@ -739,7 +739,7 @@ class Xml extends BaseReader
                                                 if ($columnReference[0] == '[') {
                                                     $columnReference = $columnNumber + trim($columnReference, '[]');
                                                 }
-                                                $A1CellReference = Cell::stringFromColumnIndex($columnReference - 1) . $rowReference;
+                                                $A1CellReference = Coordinate::stringFromColumnIndex($columnReference - 1) . $rowReference;
                                                 $value = substr_replace($value, $A1CellReference, $cellReference[0][1], strlen($cellReference[0][0]));
                                             }
                                         }
diff --git a/src/PhpSpreadsheet/ReferenceHelper.php b/src/PhpSpreadsheet/ReferenceHelper.php
index a7944727..1faafed5 100644
--- a/src/PhpSpreadsheet/ReferenceHelper.php
+++ b/src/PhpSpreadsheet/ReferenceHelper.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
 
@@ -126,8 +126,8 @@ class ReferenceHelper
      */
     private static function cellAddressInDeleteRange($cellAddress, $beforeRow, $pNumRows, $beforeColumnIndex, $pNumCols)
     {
-        list($cellColumn, $cellRow) = Cell::coordinateFromString($cellAddress);
-        $cellColumnIndex = Cell::columnIndexFromString($cellColumn);
+        list($cellColumn, $cellRow) = Coordinate::coordinateFromString($cellAddress);
+        $cellColumnIndex = Coordinate::columnIndexFromString($cellColumn);
         //    Is cell within the range of rows/columns if we're deleting
         if ($pNumRows < 0 &&
             ($cellRow >= ($beforeRow + $pNumRows)) &&
@@ -313,7 +313,7 @@ class ReferenceHelper
         if (!empty($aColumnDimensions)) {
             foreach ($aColumnDimensions as $objColumnDimension) {
                 $newReference = $this->updateCellReference($objColumnDimension->getColumnIndex() . '1', $pBefore, $pNumCols, $pNumRows);
-                list($newReference) = Cell::coordinateFromString($newReference);
+                list($newReference) = Coordinate::coordinateFromString($newReference);
                 if ($objColumnDimension->getColumnIndex() != $newReference) {
                     $objColumnDimension->setColumnIndex($newReference);
                 }
@@ -338,7 +338,7 @@ class ReferenceHelper
         if (!empty($aRowDimensions)) {
             foreach ($aRowDimensions as $objRowDimension) {
                 $newReference = $this->updateCellReference('A' . $objRowDimension->getRowIndex(), $pBefore, $pNumCols, $pNumRows);
-                list(, $newReference) = Cell::coordinateFromString($newReference);
+                list(, $newReference) = Coordinate::coordinateFromString($newReference);
                 if ($objRowDimension->getRowIndex() != $newReference) {
                     $objRowDimension->setRowIndex($newReference);
                 }
@@ -374,8 +374,8 @@ class ReferenceHelper
         // Get coordinate of $pBefore
         $beforeColumn = 'A';
         $beforeRow = 1;
-        list($beforeColumn, $beforeRow) = Cell::coordinateFromString($pBefore);
-        $beforeColumnIndex = Cell::columnIndexFromString($beforeColumn);
+        list($beforeColumn, $beforeRow) = Coordinate::coordinateFromString($pBefore);
+        $beforeColumnIndex = Coordinate::columnIndexFromString($beforeColumn);
 
         // Clear cells if we are removing columns or rows
         $highestColumn = $pSheet->getHighestColumn();
@@ -385,7 +385,7 @@ class ReferenceHelper
         if ($pNumCols < 0 && $beforeColumnIndex - 2 + $pNumCols > 0) {
             for ($i = 1; $i <= $highestRow - 1; ++$i) {
                 for ($j = $beforeColumnIndex - 1 + $pNumCols; $j <= $beforeColumnIndex - 2; ++$j) {
-                    $coordinate = Cell::stringFromColumnIndex($j) . $i;
+                    $coordinate = Coordinate::stringFromColumnIndex($j) . $i;
                     $pSheet->removeConditionalStyles($coordinate);
                     if ($pSheet->cellExists($coordinate)) {
                         $pSheet->getCell($coordinate)->setValueExplicit('', DataType::TYPE_NULL);
@@ -397,9 +397,9 @@ class ReferenceHelper
 
         // 2. Clear row strips if we are removing rows
         if ($pNumRows < 0 && $beforeRow - 1 + $pNumRows > 0) {
-            for ($i = $beforeColumnIndex - 1; $i <= Cell::columnIndexFromString($highestColumn) - 1; ++$i) {
+            for ($i = $beforeColumnIndex - 1; $i <= Coordinate::columnIndexFromString($highestColumn) - 1; ++$i) {
                 for ($j = $beforeRow + $pNumRows; $j <= $beforeRow - 1; ++$j) {
-                    $coordinate = Cell::stringFromColumnIndex($i) . $j;
+                    $coordinate = Coordinate::stringFromColumnIndex($i) . $j;
                     $pSheet->removeConditionalStyles($coordinate);
                     if ($pSheet->cellExists($coordinate)) {
                         $pSheet->getCell($coordinate)->setValueExplicit('', DataType::TYPE_NULL);
@@ -416,14 +416,14 @@ class ReferenceHelper
         }
         while ($coordinate = array_pop($allCoordinates)) {
             $cell = $pSheet->getCell($coordinate);
-            $cellIndex = Cell::columnIndexFromString($cell->getColumn());
+            $cellIndex = Coordinate::columnIndexFromString($cell->getColumn());
 
             if ($cellIndex - 1 + $pNumCols < 0) {
                 continue;
             }
 
             // New coordinate
-            $newCoordinate = Cell::stringFromColumnIndex($cellIndex - 1 + $pNumCols) . ($cell->getRow() + $pNumRows);
+            $newCoordinate = Coordinate::stringFromColumnIndex($cellIndex - 1 + $pNumCols) . ($cell->getRow() + $pNumRows);
 
             // Should the cell be updated? Move value and cellXf index from one cell to another.
             if (($cellIndex >= $beforeColumnIndex) && ($cell->getRow() >= $beforeRow)) {
@@ -459,7 +459,7 @@ class ReferenceHelper
         if ($pNumCols > 0 && $beforeColumnIndex - 2 > 0) {
             for ($i = $beforeRow; $i <= $highestRow - 1; ++$i) {
                 // Style
-                $coordinate = Cell::stringFromColumnIndex($beforeColumnIndex - 2) . $i;
+                $coordinate = Coordinate::stringFromColumnIndex($beforeColumnIndex - 2) . $i;
                 if ($pSheet->cellExists($coordinate)) {
                     $xfIndex = $pSheet->getCell($coordinate)->getXfIndex();
                     $conditionalStyles = $pSheet->conditionalStylesExists($coordinate) ?
@@ -471,7 +471,7 @@ class ReferenceHelper
                             foreach ($conditionalStyles as $conditionalStyle) {
                                 $cloned[] = clone $conditionalStyle;
                             }
-                            $pSheet->setConditionalStyles(Cell::stringFromColumnIndex($j) . $i, $cloned);
+                            $pSheet->setConditionalStyles(Coordinate::stringFromColumnIndex($j) . $i, $cloned);
                         }
                     }
                 }
@@ -479,21 +479,21 @@ class ReferenceHelper
         }
 
         if ($pNumRows > 0 && $beforeRow - 1 > 0) {
-            for ($i = $beforeColumnIndex - 1; $i <= Cell::columnIndexFromString($highestColumn) - 1; ++$i) {
+            for ($i = $beforeColumnIndex - 1; $i <= Coordinate::columnIndexFromString($highestColumn) - 1; ++$i) {
                 // Style
-                $coordinate = Cell::stringFromColumnIndex($i) . ($beforeRow - 1);
+                $coordinate = Coordinate::stringFromColumnIndex($i) . ($beforeRow - 1);
                 if ($pSheet->cellExists($coordinate)) {
                     $xfIndex = $pSheet->getCell($coordinate)->getXfIndex();
                     $conditionalStyles = $pSheet->conditionalStylesExists($coordinate) ?
                         $pSheet->getConditionalStyles($coordinate) : false;
                     for ($j = $beforeRow; $j <= $beforeRow - 1 + $pNumRows; ++$j) {
-                        $pSheet->getCell(Cell::stringFromColumnIndex($i) . $j)->setXfIndex($xfIndex);
+                        $pSheet->getCell(Coordinate::stringFromColumnIndex($i) . $j)->setXfIndex($xfIndex);
                         if ($conditionalStyles) {
                             $cloned = [];
                             foreach ($conditionalStyles as $conditionalStyle) {
                                 $cloned[] = clone $conditionalStyle;
                             }
-                            $pSheet->setConditionalStyles(Cell::stringFromColumnIndex($i) . $j, $cloned);
+                            $pSheet->setConditionalStyles(Coordinate::stringFromColumnIndex($i) . $j, $cloned);
                         }
                     }
                 }
@@ -532,8 +532,8 @@ class ReferenceHelper
                 $autoFilterColumns = $autoFilter->getColumns();
                 if (count($autoFilterColumns) > 0) {
                     sscanf($pBefore, '%[A-Z]%d', $column, $row);
-                    $columnIndex = Cell::columnIndexFromString($column);
-                    list($rangeStart, $rangeEnd) = Cell::rangeBoundaries($autoFilterRange);
+                    $columnIndex = Coordinate::columnIndexFromString($column);
+                    list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($autoFilterRange);
                     if ($columnIndex <= $rangeEnd[0]) {
                         if ($pNumCols < 0) {
                             //    If we're actually deleting any columns that fall within the autofilter range,
@@ -541,8 +541,8 @@ class ReferenceHelper
                             $deleteColumn = $columnIndex + $pNumCols - 1;
                             $deleteCount = abs($pNumCols);
                             for ($i = 1; $i <= $deleteCount; ++$i) {
-                                if (isset($autoFilterColumns[Cell::stringFromColumnIndex($deleteColumn)])) {
-                                    $autoFilter->clearColumn(Cell::stringFromColumnIndex($deleteColumn));
+                                if (isset($autoFilterColumns[Coordinate::stringFromColumnIndex($deleteColumn)])) {
+                                    $autoFilter->clearColumn(Coordinate::stringFromColumnIndex($deleteColumn));
                                 }
                                 ++$deleteColumn;
                             }
@@ -552,24 +552,24 @@ class ReferenceHelper
                         //    Shuffle columns in autofilter range
                         if ($pNumCols > 0) {
                             //    For insert, we shuffle from end to beginning to avoid overwriting
-                            $startColID = Cell::stringFromColumnIndex($startCol - 1);
-                            $toColID = Cell::stringFromColumnIndex($startCol + $pNumCols - 1);
-                            $endColID = Cell::stringFromColumnIndex($rangeEnd[0]);
+                            $startColID = Coordinate::stringFromColumnIndex($startCol - 1);
+                            $toColID = Coordinate::stringFromColumnIndex($startCol + $pNumCols - 1);
+                            $endColID = Coordinate::stringFromColumnIndex($rangeEnd[0]);
 
                             $startColRef = $startCol;
                             $endColRef = $rangeEnd[0];
                             $toColRef = $rangeEnd[0] + $pNumCols;
 
                             do {
-                                $autoFilter->shiftColumn(Cell::stringFromColumnIndex($endColRef - 1), Cell::stringFromColumnIndex($toColRef - 1));
+                                $autoFilter->shiftColumn(Coordinate::stringFromColumnIndex($endColRef - 1), Coordinate::stringFromColumnIndex($toColRef - 1));
                                 --$endColRef;
                                 --$toColRef;
                             } while ($startColRef <= $endColRef);
                         } else {
                             //    For delete, we shuffle from beginning to end to avoid overwriting
-                            $startColID = Cell::stringFromColumnIndex($startCol - 1);
-                            $toColID = Cell::stringFromColumnIndex($startCol + $pNumCols - 1);
-                            $endColID = Cell::stringFromColumnIndex($rangeEnd[0]);
+                            $startColID = Coordinate::stringFromColumnIndex($startCol - 1);
+                            $toColID = Coordinate::stringFromColumnIndex($startCol + $pNumCols - 1);
+                            $endColID = Coordinate::stringFromColumnIndex($rangeEnd[0]);
                             do {
                                 $autoFilter->shiftColumn($startColID, $toColID);
                                 ++$startColID;
@@ -676,7 +676,7 @@ class ReferenceHelper
                                 $toString = ($match[2] > '') ? $match[2] . '!' : '';
                                 $toString .= $modified3 . ':' . $modified4;
                                 //    Max worksheet size is 1,048,576 rows by 16,384 columns in Excel 2007, so our adjustments need to be at least one digit more
-                                $column = Cell::columnIndexFromString(trim($match[3], '$')) + 100000;
+                                $column = Coordinate::columnIndexFromString(trim($match[3], '$')) + 100000;
                                 $row = 10000000;
                                 $cellIndex = $column . $row;
 
@@ -700,9 +700,9 @@ class ReferenceHelper
                             if (($match[2] == '') || (trim($match[2], "'") == $sheetName)) {
                                 $toString = ($match[2] > '') ? $match[2] . '!' : '';
                                 $toString .= $modified3 . ':' . $modified4;
-                                list($column, $row) = Cell::coordinateFromString($match[3]);
+                                list($column, $row) = Coordinate::coordinateFromString($match[3]);
                                 //    Max worksheet size is 1,048,576 rows by 16,384 columns in Excel 2007, so our adjustments need to be at least one digit more
-                                $column = Cell::columnIndexFromString(trim($column, '$')) + 100000;
+                                $column = Coordinate::columnIndexFromString(trim($column, '$')) + 100000;
                                 $row = trim($row, '$') + 10000000;
                                 $cellIndex = $column . $row;
 
@@ -726,9 +726,9 @@ class ReferenceHelper
                             if (($match[2] == '') || (trim($match[2], "'") == $sheetName)) {
                                 $toString = ($match[2] > '') ? $match[2] . '!' : '';
                                 $toString .= $modified3;
-                                list($column, $row) = Cell::coordinateFromString($match[3]);
+                                list($column, $row) = Coordinate::coordinateFromString($match[3]);
                                 //    Max worksheet size is 1,048,576 rows by 16,384 columns in Excel 2007, so our adjustments need to be at least one digit more
-                                $column = Cell::columnIndexFromString(trim($column, '$')) + 100000;
+                                $column = Coordinate::columnIndexFromString(trim($column, '$')) + 100000;
                                 $row = trim($row, '$') + 10000000;
                                 $cellIndex = $row . $column;
 
@@ -830,16 +830,16 @@ class ReferenceHelper
     {
         if (strpos($pCellRange, ':') !== false || strpos($pCellRange, ',') !== false) {
             // Update range
-            $range = Cell::splitRange($pCellRange);
+            $range = Coordinate::splitRange($pCellRange);
             $ic = count($range);
             for ($i = 0; $i < $ic; ++$i) {
                 $jc = count($range[$i]);
                 for ($j = 0; $j < $jc; ++$j) {
                     if (ctype_alpha($range[$i][$j])) {
-                        $r = Cell::coordinateFromString($this->updateSingleCellReference($range[$i][$j] . '1', $pBefore, $pNumCols, $pNumRows));
+                        $r = Coordinate::coordinateFromString($this->updateSingleCellReference($range[$i][$j] . '1', $pBefore, $pNumCols, $pNumRows));
                         $range[$i][$j] = $r[0];
                     } elseif (ctype_digit($range[$i][$j])) {
-                        $r = Cell::coordinateFromString($this->updateSingleCellReference('A' . $range[$i][$j], $pBefore, $pNumCols, $pNumRows));
+                        $r = Coordinate::coordinateFromString($this->updateSingleCellReference('A' . $range[$i][$j], $pBefore, $pNumCols, $pNumRows));
                         $range[$i][$j] = $r[1];
                     } else {
                         $range[$i][$j] = $this->updateSingleCellReference($range[$i][$j], $pBefore, $pNumCols, $pNumRows);
@@ -848,7 +848,7 @@ class ReferenceHelper
             }
 
             // Recreate range string
-            return Cell::buildRange($range);
+            return Coordinate::buildRange($range);
         }
 
         throw new Exception('Only cell ranges may be passed to this method.');
@@ -870,18 +870,18 @@ class ReferenceHelper
     {
         if (strpos($pCellReference, ':') === false && strpos($pCellReference, ',') === false) {
             // Get coordinate of $pBefore
-            list($beforeColumn, $beforeRow) = Cell::coordinateFromString($pBefore);
+            list($beforeColumn, $beforeRow) = Coordinate::coordinateFromString($pBefore);
 
             // Get coordinate of $pCellReference
-            list($newColumn, $newRow) = Cell::coordinateFromString($pCellReference);
+            list($newColumn, $newRow) = Coordinate::coordinateFromString($pCellReference);
 
             // Verify which parts should be updated
-            $updateColumn = (($newColumn[0] != '$') && ($beforeColumn[0] != '$') && (Cell::columnIndexFromString($newColumn) >= Cell::columnIndexFromString($beforeColumn)));
+            $updateColumn = (($newColumn[0] != '$') && ($beforeColumn[0] != '$') && (Coordinate::columnIndexFromString($newColumn) >= Coordinate::columnIndexFromString($beforeColumn)));
             $updateRow = (($newRow[0] != '$') && ($beforeRow[0] != '$') && $newRow >= $beforeRow);
 
             // Create new column reference
             if ($updateColumn) {
-                $newColumn = Cell::stringFromColumnIndex(Cell::columnIndexFromString($newColumn) - 1 + $pNumCols);
+                $newColumn = Coordinate::stringFromColumnIndex(Coordinate::columnIndexFromString($newColumn) - 1 + $pNumCols);
             }
 
             // Create new row reference
diff --git a/src/PhpSpreadsheet/Shared/Xls.php b/src/PhpSpreadsheet/Shared/Xls.php
index be1f7494..e25394bc 100644
--- a/src/PhpSpreadsheet/Shared/Xls.php
+++ b/src/PhpSpreadsheet/Shared/Xls.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Shared;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
 
 class Xls
@@ -111,10 +111,10 @@ class Xls
         $distanceX = 0;
 
         // add the widths of the spanning columns
-        $startColumnIndex = Cell::columnIndexFromString($startColumn) - 1; // 1-based
-        $endColumnIndex = Cell::columnIndexFromString($endColumn) - 1; // 1-based
+        $startColumnIndex = Coordinate::columnIndexFromString($startColumn) - 1; // 1-based
+        $endColumnIndex = Coordinate::columnIndexFromString($endColumn) - 1; // 1-based
         for ($i = $startColumnIndex; $i <= $endColumnIndex; ++$i) {
-            $distanceX += self::sizeCol($sheet, Cell::stringFromColumnIndex($i));
+            $distanceX += self::sizeCol($sheet, Coordinate::stringFromColumnIndex($i));
         }
 
         // correct for offsetX in startcell
@@ -211,8 +211,8 @@ class Xls
      */
     public static function oneAnchor2twoAnchor($sheet, $coordinates, $offsetX, $offsetY, $width, $height)
     {
-        list($column, $row) = Cell::coordinateFromString($coordinates);
-        $col_start = Cell::columnIndexFromString($column) - 1;
+        list($column, $row) = Coordinate::coordinateFromString($coordinates);
+        $col_start = Coordinate::columnIndexFromString($column) - 1;
         $row_start = $row - 1;
 
         $x1 = $offsetX;
@@ -223,7 +223,7 @@ class Xls
         $row_end = $row_start; // Row containing bottom right corner of object
 
         // Zero the specified offset if greater than the cell dimensions
-        if ($x1 >= self::sizeCol($sheet, Cell::stringFromColumnIndex($col_start))) {
+        if ($x1 >= self::sizeCol($sheet, Coordinate::stringFromColumnIndex($col_start))) {
             $x1 = 0;
         }
         if ($y1 >= self::sizeRow($sheet, $row_start + 1)) {
@@ -234,8 +234,8 @@ class Xls
         $height = $height + $y1 - 1;
 
         // Subtract the underlying cell widths to find the end cell of the image
-        while ($width >= self::sizeCol($sheet, Cell::stringFromColumnIndex($col_end))) {
-            $width -= self::sizeCol($sheet, Cell::stringFromColumnIndex($col_end));
+        while ($width >= self::sizeCol($sheet, Coordinate::stringFromColumnIndex($col_end))) {
+            $width -= self::sizeCol($sheet, Coordinate::stringFromColumnIndex($col_end));
             ++$col_end;
         }
 
@@ -247,10 +247,10 @@ class Xls
 
         // Bitmap isn't allowed to start or finish in a hidden cell, i.e. a cell
         // with zero height or width.
-        if (self::sizeCol($sheet, Cell::stringFromColumnIndex($col_start)) == 0) {
+        if (self::sizeCol($sheet, Coordinate::stringFromColumnIndex($col_start)) == 0) {
             return;
         }
-        if (self::sizeCol($sheet, Cell::stringFromColumnIndex($col_end)) == 0) {
+        if (self::sizeCol($sheet, Coordinate::stringFromColumnIndex($col_end)) == 0) {
             return;
         }
         if (self::sizeRow($sheet, $row_start + 1) == 0) {
@@ -261,13 +261,13 @@ class Xls
         }
 
         // Convert the pixel values to the percentage value expected by Excel
-        $x1 = $x1 / self::sizeCol($sheet, Cell::stringFromColumnIndex($col_start)) * 1024;
+        $x1 = $x1 / self::sizeCol($sheet, Coordinate::stringFromColumnIndex($col_start)) * 1024;
         $y1 = $y1 / self::sizeRow($sheet, $row_start + 1) * 256;
-        $x2 = ($width + 1) / self::sizeCol($sheet, Cell::stringFromColumnIndex($col_end)) * 1024; // Distance to right side of object
+        $x2 = ($width + 1) / self::sizeCol($sheet, Coordinate::stringFromColumnIndex($col_end)) * 1024; // Distance to right side of object
         $y2 = ($height + 1) / self::sizeRow($sheet, $row_end + 1) * 256; // Distance to bottom of object
 
-        $startCoordinates = Cell::stringFromColumnIndex($col_start) . ($row_start + 1);
-        $endCoordinates = Cell::stringFromColumnIndex($col_end) . ($row_end + 1);
+        $startCoordinates = Coordinate::stringFromColumnIndex($col_start) . ($row_start + 1);
+        $endCoordinates = Coordinate::stringFromColumnIndex($col_end) . ($row_end + 1);
 
         $twoAnchor = [
             'startCoordinates' => $startCoordinates,
diff --git a/src/PhpSpreadsheet/Style/Style.php b/src/PhpSpreadsheet/Style/Style.php
index 99ba8d16..fa49a2e1 100644
--- a/src/PhpSpreadsheet/Style/Style.php
+++ b/src/PhpSpreadsheet/Style/Style.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Style;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 
 class Style extends Supervisor
@@ -206,12 +206,12 @@ class Style extends Supervisor
             }
 
             // Calculate range outer borders
-            $rangeStart = Cell::coordinateFromString($rangeA);
-            $rangeEnd = Cell::coordinateFromString($rangeB);
+            $rangeStart = Coordinate::coordinateFromString($rangeA);
+            $rangeEnd = Coordinate::coordinateFromString($rangeB);
 
             // Translate column into index
-            $rangeStart[0] = Cell::columnIndexFromString($rangeStart[0]) - 1;
-            $rangeEnd[0] = Cell::columnIndexFromString($rangeEnd[0]) - 1;
+            $rangeStart[0] = Coordinate::columnIndexFromString($rangeStart[0]) - 1;
+            $rangeEnd[0] = Coordinate::columnIndexFromString($rangeEnd[0]) - 1;
 
             // Make sure we can loop upwards on rows and columns
             if ($rangeStart[0] > $rangeEnd[0] && $rangeStart[1] > $rangeEnd[1]) {
@@ -260,12 +260,12 @@ class Style extends Supervisor
                 for ($x = 1; $x <= $xMax; ++$x) {
                     // start column index for region
                     $colStart = ($x == 3) ?
-                        Cell::stringFromColumnIndex($rangeEnd[0])
-                            : Cell::stringFromColumnIndex($rangeStart[0] + $x - 1);
+                        Coordinate::stringFromColumnIndex($rangeEnd[0])
+                            : Coordinate::stringFromColumnIndex($rangeStart[0] + $x - 1);
                     // end column index for region
                     $colEnd = ($x == 1) ?
-                        Cell::stringFromColumnIndex($rangeStart[0])
-                            : Cell::stringFromColumnIndex($rangeEnd[0] - $xMax + $x);
+                        Coordinate::stringFromColumnIndex($rangeStart[0])
+                            : Coordinate::stringFromColumnIndex($rangeEnd[0] - $xMax + $x);
 
                     for ($y = 1; $y <= $yMax; ++$y) {
                         // which edges are touching the region
diff --git a/src/PhpSpreadsheet/Worksheet/AutoFilter.php b/src/PhpSpreadsheet/Worksheet/AutoFilter.php
index 71b02ce2..515e3781 100644
--- a/src/PhpSpreadsheet/Worksheet/AutoFilter.php
+++ b/src/PhpSpreadsheet/Worksheet/AutoFilter.php
@@ -5,7 +5,7 @@ namespace PhpOffice\PhpSpreadsheet\Worksheet;
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\DateTime;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 use PhpOffice\PhpSpreadsheet\Shared\Date;
 
@@ -108,9 +108,9 @@ class AutoFilter
             $this->columns = [];
         } else {
             //    Discard any column rules that are no longer valid within this range
-            list($rangeStart, $rangeEnd) = Cell::rangeBoundaries($this->range);
+            list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($this->range);
             foreach ($this->columns as $key => $value) {
-                $colIndex = Cell::columnIndexFromString($key);
+                $colIndex = Coordinate::columnIndexFromString($key);
                 if (($rangeStart[0] > $colIndex) || ($rangeEnd[0] < $colIndex)) {
                     unset($this->columns[$key]);
                 }
@@ -147,8 +147,8 @@ class AutoFilter
             throw new PhpSpreadsheetException('No autofilter range is defined.');
         }
 
-        $columnIndex = Cell::columnIndexFromString($column);
-        list($rangeStart, $rangeEnd) = Cell::rangeBoundaries($this->range);
+        $columnIndex = Coordinate::columnIndexFromString($column);
+        list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($this->range);
         if (($rangeStart[0] > $columnIndex) || ($rangeEnd[0] < $columnIndex)) {
             throw new PhpSpreadsheetException('Column is outside of current autofilter range.');
         }
@@ -201,8 +201,8 @@ class AutoFilter
      */
     public function getColumnByOffset($pColumnOffset)
     {
-        list($rangeStart, $rangeEnd) = Cell::rangeBoundaries($this->range);
-        $pColumn = Cell::stringFromColumnIndex($rangeStart[0] + $pColumnOffset - 1);
+        list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($this->range);
+        $pColumn = Coordinate::stringFromColumnIndex($rangeStart[0] + $pColumnOffset - 1);
 
         return $this->getColumn($pColumn);
     }
@@ -623,7 +623,7 @@ class AutoFilter
      */
     public function showHideRows()
     {
-        list($rangeStart, $rangeEnd) = Cell::rangeBoundaries($this->range);
+        list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($this->range);
 
         //    The heading row should always be visible
         $this->workSheet->getRowDimension($rangeStart[1])->setVisible(true);
diff --git a/src/PhpSpreadsheet/Worksheet/ColumnCellIterator.php b/src/PhpSpreadsheet/Worksheet/ColumnCellIterator.php
index fdbbfe4c..b1d505fd 100644
--- a/src/PhpSpreadsheet/Worksheet/ColumnCellIterator.php
+++ b/src/PhpSpreadsheet/Worksheet/ColumnCellIterator.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Worksheet;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 
 class ColumnCellIterator extends CellIterator
@@ -40,7 +40,7 @@ class ColumnCellIterator extends CellIterator
     {
         // Set subject
         $this->subject = $subject;
-        $this->columnIndex = Cell::columnIndexFromString($columnIndex) - 1;
+        $this->columnIndex = Coordinate::columnIndexFromString($columnIndex) - 1;
         $this->resetEnd($endRow);
         $this->resetStart($startRow);
     }
diff --git a/src/PhpSpreadsheet/Worksheet/ColumnIterator.php b/src/PhpSpreadsheet/Worksheet/ColumnIterator.php
index 7d12d5f6..caee73f7 100644
--- a/src/PhpSpreadsheet/Worksheet/ColumnIterator.php
+++ b/src/PhpSpreadsheet/Worksheet/ColumnIterator.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Worksheet;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Exception;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 
@@ -70,8 +70,8 @@ class ColumnIterator implements \Iterator
      */
     public function resetStart($startColumn = 'A')
     {
-        $startColumnIndex = Cell::columnIndexFromString($startColumn) - 1;
-        if ($startColumnIndex > Cell::columnIndexFromString($this->subject->getHighestColumn()) - 1) {
+        $startColumnIndex = Coordinate::columnIndexFromString($startColumn) - 1;
+        if ($startColumnIndex > Coordinate::columnIndexFromString($this->subject->getHighestColumn()) - 1) {
             throw new Exception("Start column ({$startColumn}) is beyond highest column ({$this->subject->getHighestColumn()})");
         }
 
@@ -94,7 +94,7 @@ class ColumnIterator implements \Iterator
     public function resetEnd($endColumn = null)
     {
         $endColumn = ($endColumn) ? $endColumn : $this->subject->getHighestColumn();
-        $this->endColumn = Cell::columnIndexFromString($endColumn) - 1;
+        $this->endColumn = Coordinate::columnIndexFromString($endColumn) - 1;
 
         return $this;
     }
@@ -110,7 +110,7 @@ class ColumnIterator implements \Iterator
      */
     public function seek($column = 'A')
     {
-        $column = Cell::columnIndexFromString($column) - 1;
+        $column = Coordinate::columnIndexFromString($column) - 1;
         if (($column < $this->startColumn) || ($column > $this->endColumn)) {
             throw new PhpSpreadsheetException("Column $column is out of range ({$this->startColumn} - {$this->endColumn})");
         }
@@ -134,7 +134,7 @@ class ColumnIterator implements \Iterator
      */
     public function current()
     {
-        return new Column($this->subject, Cell::stringFromColumnIndex($this->position));
+        return new Column($this->subject, Coordinate::stringFromColumnIndex($this->position));
     }
 
     /**
@@ -144,7 +144,7 @@ class ColumnIterator implements \Iterator
      */
     public function key()
     {
-        return Cell::stringFromColumnIndex($this->position);
+        return Coordinate::stringFromColumnIndex($this->position);
     }
 
     /**
@@ -163,7 +163,7 @@ class ColumnIterator implements \Iterator
     public function prev()
     {
         if ($this->position <= $this->startColumn) {
-            throw new PhpSpreadsheetException('Column is already at the beginning of range (' . Cell::stringFromColumnIndex($this->endColumn) . ' - ' . Cell::stringFromColumnIndex($this->endColumn) . ')');
+            throw new PhpSpreadsheetException('Column is already at the beginning of range (' . Coordinate::stringFromColumnIndex($this->endColumn) . ' - ' . Coordinate::stringFromColumnIndex($this->endColumn) . ')');
         }
         --$this->position;
     }
diff --git a/src/PhpSpreadsheet/Worksheet/PageSetup.php b/src/PhpSpreadsheet/Worksheet/PageSetup.php
index 8bf25a88..175a8c11 100644
--- a/src/PhpSpreadsheet/Worksheet/PageSetup.php
+++ b/src/PhpSpreadsheet/Worksheet/PageSetup.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Worksheet;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 
 /**
@@ -767,7 +767,7 @@ class PageSetup
     public function setPrintAreaByColumnAndRow($column1, $row1, $column2, $row2, $index = 0, $method = self::SETPRINTRANGE_OVERWRITE)
     {
         return $this->setPrintArea(
-            Cell::stringFromColumnIndex($column1) . $row1 . ':' . Cell::stringFromColumnIndex($column2) . $row2,
+            Coordinate::stringFromColumnIndex($column1) . $row1 . ':' . Coordinate::stringFromColumnIndex($column2) . $row2,
             $index,
             $method
         );
@@ -794,7 +794,7 @@ class PageSetup
     public function addPrintAreaByColumnAndRow($column1, $row1, $column2, $row2, $index = -1)
     {
         return $this->setPrintArea(
-            Cell::stringFromColumnIndex($column1) . $row1 . ':' . Cell::stringFromColumnIndex($column2) . $row2,
+            Coordinate::stringFromColumnIndex($column1) . $row1 . ':' . Coordinate::stringFromColumnIndex($column2) . $row2,
             $index,
             self::SETPRINTRANGE_INSERT
         );
diff --git a/src/PhpSpreadsheet/Worksheet/RowCellIterator.php b/src/PhpSpreadsheet/Worksheet/RowCellIterator.php
index 06ce0697..99fabc6a 100644
--- a/src/PhpSpreadsheet/Worksheet/RowCellIterator.php
+++ b/src/PhpSpreadsheet/Worksheet/RowCellIterator.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Worksheet;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 
 class RowCellIterator extends CellIterator
@@ -64,10 +64,10 @@ class RowCellIterator extends CellIterator
      */
     public function resetStart($startColumn = 'A')
     {
-        $startColumnIndex = Cell::columnIndexFromString($startColumn) - 1;
+        $startColumnIndex = Coordinate::columnIndexFromString($startColumn) - 1;
         $this->startColumn = $startColumnIndex;
         $this->adjustForExistingOnlyRange();
-        $this->seek(Cell::stringFromColumnIndex($this->startColumn));
+        $this->seek(Coordinate::stringFromColumnIndex($this->startColumn));
 
         return $this;
     }
@@ -84,7 +84,7 @@ class RowCellIterator extends CellIterator
     public function resetEnd($endColumn = null)
     {
         $endColumn = ($endColumn) ? $endColumn : $this->subject->getHighestColumn();
-        $this->endColumn = Cell::columnIndexFromString($endColumn) - 1;
+        $this->endColumn = Coordinate::columnIndexFromString($endColumn) - 1;
         $this->adjustForExistingOnlyRange();
 
         return $this;
@@ -101,7 +101,7 @@ class RowCellIterator extends CellIterator
      */
     public function seek($column = 'A')
     {
-        $column = Cell::columnIndexFromString($column) - 1;
+        $column = Coordinate::columnIndexFromString($column) - 1;
         if (($column < $this->startColumn) || ($column > $this->endColumn)) {
             throw new PhpSpreadsheetException("Column $column is out of range ({$this->startColumn} - {$this->endColumn})");
         } elseif ($this->onlyExistingCells && !($this->subject->cellExistsByColumnAndRow($column, $this->rowIndex))) {
@@ -137,7 +137,7 @@ class RowCellIterator extends CellIterator
      */
     public function key()
     {
-        return Cell::stringFromColumnIndex($this->position);
+        return Coordinate::stringFromColumnIndex($this->position);
     }
 
     /**
@@ -158,7 +158,7 @@ class RowCellIterator extends CellIterator
     public function prev()
     {
         if ($this->position <= $this->startColumn) {
-            throw new PhpSpreadsheetException('Column is already at the beginning of range (' . Cell::stringFromColumnIndex($this->endColumn) . ' - ' . Cell::stringFromColumnIndex($this->endColumn) . ')');
+            throw new PhpSpreadsheetException('Column is already at the beginning of range (' . Coordinate::stringFromColumnIndex($this->endColumn) . ' - ' . Coordinate::stringFromColumnIndex($this->endColumn) . ')');
         }
         do {
             --$this->position;
diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
index 10a49c30..0e5fd0d6 100644
--- a/src/PhpSpreadsheet/Worksheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -5,6 +5,7 @@ namespace PhpOffice\PhpSpreadsheet\Worksheet;
 use ArrayObject;
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Cell\DataValidation;
 use PhpOffice\PhpSpreadsheet\Cell\Hyperlink;
@@ -715,7 +716,7 @@ class Worksheet implements IComparable
             // build list of cells references that participate in a merge
             $isMergeCell = [];
             foreach ($this->getMergeCells() as $cells) {
-                foreach (Cell::extractAllCellReferencesInRange($cells) as $cellReference) {
+                foreach (Coordinate::extractAllCellReferencesInRange($cells) as $cellReference) {
                     $isMergeCell[$cellReference] = true;
                 }
             }
@@ -733,7 +734,7 @@ class Worksheet implements IComparable
                     //The only exception is if it's a merge range value cell of a 'vertical' randge (1 column wide)
                     if ($isMerged && $cell->isMergeRangeValueCell()) {
                         $range = $cell->getMergeRange();
-                        $rangeBoundaries = Cell::rangeDimension($range);
+                        $rangeBoundaries = Coordinate::rangeDimension($range);
                         if ($rangeBoundaries[0] == 1) {
                             $isMergedButProceed = true;
                         }
@@ -1230,7 +1231,7 @@ class Worksheet implements IComparable
      */
     public function getCellByColumnAndRow($pColumn, $pRow, $createIfNotExists = true)
     {
-        $columnLetter = Cell::stringFromColumnIndex($pColumn);
+        $columnLetter = Coordinate::stringFromColumnIndex($pColumn);
         $coordinate = $columnLetter . $pRow;
 
         if ($this->cellCollection->has($coordinate)) {
@@ -1255,8 +1256,8 @@ class Worksheet implements IComparable
         $this->cellCollectionIsSorted = false;
 
         // Coordinates
-        $aCoordinates = Cell::coordinateFromString($pCoordinate);
-        if (Cell::columnIndexFromString($this->cachedHighestColumn) < Cell::columnIndexFromString($aCoordinates[0])) {
+        $aCoordinates = Coordinate::coordinateFromString($pCoordinate);
+        if (Coordinate::columnIndexFromString($this->cachedHighestColumn) < Coordinate::columnIndexFromString($aCoordinates[0])) {
             $this->cachedHighestColumn = $aCoordinates[0];
         }
         $this->cachedHighestRow = max($this->cachedHighestRow, $aCoordinates[1]);
@@ -1336,7 +1337,7 @@ class Worksheet implements IComparable
      */
     public function cellExistsByColumnAndRow($pColumn, $pRow)
     {
-        return $this->cellExists(Cell::stringFromColumnIndex($pColumn) . $pRow);
+        return $this->cellExists(Coordinate::stringFromColumnIndex($pColumn) . $pRow);
     }
 
     /**
@@ -1385,7 +1386,7 @@ class Worksheet implements IComparable
             }
             $this->columnDimensions[$pColumn] = new ColumnDimension($pColumn);
 
-            if (Cell::columnIndexFromString($this->cachedHighestColumn) < Cell::columnIndexFromString($pColumn)) {
+            if (Coordinate::columnIndexFromString($this->cachedHighestColumn) < Coordinate::columnIndexFromString($pColumn)) {
                 $this->cachedHighestColumn = $pColumn;
             }
         }
@@ -1402,7 +1403,7 @@ class Worksheet implements IComparable
      */
     public function getColumnDimensionByColumn($pColumn)
     {
-        return $this->getColumnDimension(Cell::stringFromColumnIndex($pColumn));
+        return $this->getColumnDimension(Coordinate::stringFromColumnIndex($pColumn));
     }
 
     /**
@@ -1522,12 +1523,12 @@ class Worksheet implements IComparable
     public function getStyleByColumnAndRow($pColumn, $pRow, $pColumn2 = null, $pRow2 = null)
     {
         if ($pColumn2 !== null && $pRow2 !== null) {
-            $cellRange = Cell::stringFromColumnIndex($pColumn) . $pRow . ':' . Cell::stringFromColumnIndex($pColumn2) . $pRow2;
+            $cellRange = Coordinate::stringFromColumnIndex($pColumn) . $pRow . ':' . Coordinate::stringFromColumnIndex($pColumn2) . $pRow2;
 
             return $this->getStyle($cellRange);
         }
 
-        return $this->getStyle(Cell::stringFromColumnIndex($pColumn) . $pRow);
+        return $this->getStyle(Coordinate::stringFromColumnIndex($pColumn) . $pRow);
     }
 
     /**
@@ -1556,7 +1557,7 @@ class Worksheet implements IComparable
         }
 
         // Calculate range outer borders
-        list($rangeStart, $rangeEnd) = Cell::rangeBoundaries($pRange . ':' . $pRange);
+        list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($pRange . ':' . $pRange);
 
         // Make sure we can loop upwards on rows and columns
         if ($rangeStart[0] > $rangeEnd[0] && $rangeStart[1] > $rangeEnd[1]) {
@@ -1568,7 +1569,7 @@ class Worksheet implements IComparable
         // Loop through cells and apply styles
         for ($col = $rangeStart[0]; $col <= $rangeEnd[0]; ++$col) {
             for ($row = $rangeStart[1]; $row <= $rangeEnd[1]; ++$row) {
-                $this->getCell(Cell::stringFromColumnIndex($col - 1) . $row)->setXfIndex($xfIndex);
+                $this->getCell(Coordinate::stringFromColumnIndex($col - 1) . $row)->setXfIndex($xfIndex);
             }
         }
 
@@ -1596,7 +1597,7 @@ class Worksheet implements IComparable
         }
 
         // Calculate range outer borders
-        list($rangeStart, $rangeEnd) = Cell::rangeBoundaries($pRange . ':' . $pRange);
+        list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($pRange . ':' . $pRange);
 
         // Make sure we can loop upwards on rows and columns
         if ($rangeStart[0] > $rangeEnd[0] && $rangeStart[1] > $rangeEnd[1]) {
@@ -1608,7 +1609,7 @@ class Worksheet implements IComparable
         // Loop through cells and apply styles
         for ($col = $rangeStart[0]; $col <= $rangeEnd[0]; ++$col) {
             for ($row = $rangeStart[1]; $row <= $rangeEnd[1]; ++$row) {
-                $this->setConditionalStyles(Cell::stringFromColumnIndex($col - 1) . $row, $pCellStyle);
+                $this->setConditionalStyles(Coordinate::stringFromColumnIndex($col - 1) . $row, $pCellStyle);
             }
         }
 
@@ -1656,7 +1657,7 @@ class Worksheet implements IComparable
      */
     public function setBreakByColumnAndRow($pColumn, $pRow, $pBreak)
     {
-        return $this->setBreak(Cell::stringFromColumnIndex($pColumn) . $pRow, $pBreak);
+        return $this->setBreak(Coordinate::stringFromColumnIndex($pColumn) . $pRow, $pBreak);
     }
 
     /**
@@ -1689,7 +1690,7 @@ class Worksheet implements IComparable
             // make sure cells are created
 
             // get the cells in the range
-            $aReferences = Cell::extractAllCellReferencesInRange($pRange);
+            $aReferences = Coordinate::extractAllCellReferencesInRange($pRange);
 
             // create upper left cell if it does not already exist
             $upperLeft = $aReferences[0];
@@ -1725,7 +1726,7 @@ class Worksheet implements IComparable
      */
     public function mergeCellsByColumnAndRow($pColumn1, $pRow1, $pColumn2, $pRow2)
     {
-        $cellRange = Cell::stringFromColumnIndex($pColumn1) . $pRow1 . ':' . Cell::stringFromColumnIndex($pColumn2) . $pRow2;
+        $cellRange = Coordinate::stringFromColumnIndex($pColumn1) . $pRow1 . ':' . Coordinate::stringFromColumnIndex($pColumn2) . $pRow2;
 
         return $this->mergeCells($cellRange);
     }
@@ -1771,7 +1772,7 @@ class Worksheet implements IComparable
      */
     public function unmergeCellsByColumnAndRow($pColumn1, $pRow1, $pColumn2, $pRow2)
     {
-        $cellRange = Cell::stringFromColumnIndex($pColumn1) . $pRow1 . ':' . Cell::stringFromColumnIndex($pColumn2) . $pRow2;
+        $cellRange = Coordinate::stringFromColumnIndex($pColumn1) . $pRow1 . ':' . Coordinate::stringFromColumnIndex($pColumn2) . $pRow2;
 
         return $this->unmergeCells($cellRange);
     }
@@ -1840,7 +1841,7 @@ class Worksheet implements IComparable
      */
     public function protectCellsByColumnAndRow($pColumn1, $pRow1, $pColumn2, $pRow2, $pPassword, $pAlreadyHashed = false)
     {
-        $cellRange = Cell::stringFromColumnIndex($pColumn1) . $pRow1 . ':' . Cell::stringFromColumnIndex($pColumn2) . $pRow2;
+        $cellRange = Coordinate::stringFromColumnIndex($pColumn1) . $pRow1 . ':' . Coordinate::stringFromColumnIndex($pColumn2) . $pRow2;
 
         return $this->protectCells($cellRange, $pPassword, $pAlreadyHashed);
     }
@@ -1882,7 +1883,7 @@ class Worksheet implements IComparable
      */
     public function unprotectCellsByColumnAndRow($pColumn1, $pRow1, $pColumn2, $pRow2)
     {
-        $cellRange = Cell::stringFromColumnIndex($pColumn1) . $pRow1 . ':' . Cell::stringFromColumnIndex($pColumn2) . $pRow2;
+        $cellRange = Coordinate::stringFromColumnIndex($pColumn1) . $pRow1 . ':' . Coordinate::stringFromColumnIndex($pColumn2) . $pRow2;
 
         return $this->unprotectCells($cellRange);
     }
@@ -1943,9 +1944,9 @@ class Worksheet implements IComparable
     public function setAutoFilterByColumnAndRow($pColumn1, $pRow1, $pColumn2, $pRow2)
     {
         return $this->setAutoFilter(
-            Cell::stringFromColumnIndex($pColumn1) . $pRow1
+            Coordinate::stringFromColumnIndex($pColumn1) . $pRow1
             . ':' .
-            Cell::stringFromColumnIndex($pColumn2) . $pRow2
+            Coordinate::stringFromColumnIndex($pColumn2) . $pRow2
         );
     }
 
@@ -2010,7 +2011,7 @@ class Worksheet implements IComparable
      */
     public function freezePaneByColumnAndRow($pColumn, $pRow)
     {
-        return $this->freezePane(Cell::stringFromColumnIndex($pColumn) . $pRow);
+        return $this->freezePane(Coordinate::stringFromColumnIndex($pColumn) . $pRow);
     }
 
     /**
@@ -2080,7 +2081,7 @@ class Worksheet implements IComparable
     public function insertNewColumnBeforeByIndex($pBefore, $pNumCols = 1)
     {
         if ($pBefore >= 0) {
-            return $this->insertNewColumnBefore(Cell::stringFromColumnIndex($pBefore), $pNumCols);
+            return $this->insertNewColumnBefore(Coordinate::stringFromColumnIndex($pBefore), $pNumCols);
         }
 
         throw new Exception('Columns can only be inserted before at least column A (0).');
@@ -2127,12 +2128,12 @@ class Worksheet implements IComparable
     {
         if (!is_numeric($pColumn)) {
             $highestColumn = $this->getHighestDataColumn();
-            $pColumn = Cell::stringFromColumnIndex(Cell::columnIndexFromString($pColumn) - 1 + $pNumCols);
+            $pColumn = Coordinate::stringFromColumnIndex(Coordinate::columnIndexFromString($pColumn) - 1 + $pNumCols);
             $objReferenceHelper = ReferenceHelper::getInstance();
             $objReferenceHelper->insertNewBefore($pColumn . '1', -$pNumCols, 0, $this);
             for ($c = 0; $c < $pNumCols; ++$c) {
                 $this->getCellCollection()->removeColumn($highestColumn);
-                $highestColumn = Cell::stringFromColumnIndex(Cell::columnIndexFromString($highestColumn) - 2);
+                $highestColumn = Coordinate::stringFromColumnIndex(Coordinate::columnIndexFromString($highestColumn) - 2);
             }
         } else {
             throw new Exception('Column references should not be numeric.');
@@ -2154,7 +2155,7 @@ class Worksheet implements IComparable
     public function removeColumnByIndex($pColumn, $pNumCols = 1)
     {
         if ($pColumn >= 0) {
-            return $this->removeColumn(Cell::stringFromColumnIndex($pColumn), $pNumCols);
+            return $this->removeColumn(Coordinate::stringFromColumnIndex($pColumn), $pNumCols);
         }
 
         throw new Exception('Columns to be deleted should at least start from column 0');
@@ -2349,7 +2350,7 @@ class Worksheet implements IComparable
      */
     public function getCommentByColumnAndRow($pColumn, $pRow)
     {
-        return $this->getComment(Cell::stringFromColumnIndex($pColumn) . $pRow);
+        return $this->getComment(Coordinate::stringFromColumnIndex($pColumn) . $pRow);
     }
 
     /**
@@ -2411,7 +2412,7 @@ class Worksheet implements IComparable
         $pCoordinate = preg_replace('/^([0-9]+):([0-9]+)$/', 'A${1}:XFD${2}', $pCoordinate);
 
         if (strpos($pCoordinate, ':') !== false || strpos($pCoordinate, ',') !== false) {
-            list($first) = Cell::splitRange($pCoordinate);
+            list($first) = Coordinate::splitRange($pCoordinate);
             $this->activeCell = $first[0];
         } else {
             $this->activeCell = $pCoordinate;
@@ -2433,7 +2434,7 @@ class Worksheet implements IComparable
      */
     public function setSelectedCellByColumnAndRow($pColumn, $pRow)
     {
-        return $this->setSelectedCells(Cell::stringFromColumnIndex($pColumn) . $pRow);
+        return $this->setSelectedCells(Coordinate::stringFromColumnIndex($pColumn) . $pRow);
     }
 
     /**
@@ -2480,7 +2481,7 @@ class Worksheet implements IComparable
         }
 
         // start coordinate
-        list($startColumn, $startRow) = Cell::coordinateFromString($startCell);
+        list($startColumn, $startRow) = Coordinate::coordinateFromString($startCell);
 
         // Loop through $source
         foreach ($source as $rowData) {
@@ -2522,10 +2523,10 @@ class Worksheet implements IComparable
         // Returnvalue
         $returnValue = [];
         //    Identify the range that we need to extract from the worksheet
-        list($rangeStart, $rangeEnd) = Cell::rangeBoundaries($pRange);
-        $minCol = Cell::stringFromColumnIndex($rangeStart[0] - 1);
+        list($rangeStart, $rangeEnd) = Coordinate::rangeBoundaries($pRange);
+        $minCol = Coordinate::stringFromColumnIndex($rangeStart[0] - 1);
         $minRow = $rangeStart[1];
-        $maxCol = Cell::stringFromColumnIndex($rangeEnd[0] - 1);
+        $maxCol = Coordinate::stringFromColumnIndex($rangeEnd[0] - 1);
         $maxRow = $rangeEnd[1];
 
         ++$maxCol;
@@ -2664,11 +2665,11 @@ class Worksheet implements IComparable
         // Lookup highest column and highest row if cells are cleaned
         $colRow = $this->cellCollection->getHighestRowAndColumn();
         $highestRow = $colRow['row'];
-        $highestColumn = Cell::columnIndexFromString($colRow['column']);
+        $highestColumn = Coordinate::columnIndexFromString($colRow['column']);
 
         // Loop through column dimensions
         foreach ($this->columnDimensions as $dimension) {
-            $highestColumn = max($highestColumn, Cell::columnIndexFromString($dimension->getColumnIndex()));
+            $highestColumn = max($highestColumn, Coordinate::columnIndexFromString($dimension->getColumnIndex()));
         }
 
         // Loop through row dimensions
@@ -2680,7 +2681,7 @@ class Worksheet implements IComparable
         if ($highestColumn < 0) {
             $this->cachedHighestColumn = 'A';
         } else {
-            $this->cachedHighestColumn = Cell::stringFromColumnIndex(--$highestColumn);
+            $this->cachedHighestColumn = Coordinate::stringFromColumnIndex(--$highestColumn);
         }
         $this->cachedHighestRow = $highestRow;
 
@@ -2857,20 +2858,20 @@ class Worksheet implements IComparable
     {
         $maxCol = $this->getHighestColumn();
         $maxRow = $this->getHighestRow();
-        $maxCol = Cell::columnIndexFromString($maxCol);
+        $maxCol = Coordinate::columnIndexFromString($maxCol);
 
         $rangeBlocks = explode(' ', $range);
         foreach ($rangeBlocks as &$rangeSet) {
-            $rangeBoundaries = Cell::getRangeBoundaries($rangeSet);
+            $rangeBoundaries = Coordinate::getRangeBoundaries($rangeSet);
 
-            if (Cell::columnIndexFromString($rangeBoundaries[0][0]) > $maxCol) {
-                $rangeBoundaries[0][0] = Cell::stringFromColumnIndex($maxCol);
+            if (Coordinate::columnIndexFromString($rangeBoundaries[0][0]) > $maxCol) {
+                $rangeBoundaries[0][0] = Coordinate::stringFromColumnIndex($maxCol);
             }
             if ($rangeBoundaries[0][1] > $maxRow) {
                 $rangeBoundaries[0][1] = $maxRow;
             }
-            if (Cell::columnIndexFromString($rangeBoundaries[1][0]) > $maxCol) {
-                $rangeBoundaries[1][0] = Cell::stringFromColumnIndex($maxCol);
+            if (Coordinate::columnIndexFromString($rangeBoundaries[1][0]) > $maxCol) {
+                $rangeBoundaries[1][0] = Coordinate::stringFromColumnIndex($maxCol);
             }
             if ($rangeBoundaries[1][1] > $maxRow) {
                 $rangeBoundaries[1][1] = $maxRow;
diff --git a/src/PhpSpreadsheet/Writer/Html.php b/src/PhpSpreadsheet/Writer/Html.php
index 69d7db23..eecd9fa8 100644
--- a/src/PhpSpreadsheet/Writer/Html.php
+++ b/src/PhpSpreadsheet/Writer/Html.php
@@ -4,6 +4,7 @@ namespace PhpOffice\PhpSpreadsheet\Writer;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Chart\Chart;
 use PhpOffice\PhpSpreadsheet\RichText\RichText;
 use PhpOffice\PhpSpreadsheet\RichText\Run;
@@ -432,10 +433,10 @@ class Html extends BaseWriter
 
             // Get worksheet dimension
             $dimension = explode(':', $sheet->calculateWorksheetDimension());
-            $dimension[0] = Cell::coordinateFromString($dimension[0]);
-            $dimension[0][0] = Cell::columnIndexFromString($dimension[0][0]) - 1;
-            $dimension[1] = Cell::coordinateFromString($dimension[1]);
-            $dimension[1][0] = Cell::columnIndexFromString($dimension[1][0]) - 1;
+            $dimension[0] = Coordinate::coordinateFromString($dimension[0]);
+            $dimension[0][0] = Coordinate::columnIndexFromString($dimension[0][0]) - 1;
+            $dimension[1] = Coordinate::coordinateFromString($dimension[1]);
+            $dimension[1][0] = Coordinate::columnIndexFromString($dimension[1][0]) - 1;
 
             // row min,max
             $rowMin = $dimension[0][1];
@@ -479,7 +480,7 @@ class Html extends BaseWriter
                     while ($column++ < $dimension[1][0]) {
                         // Cell exists?
                         if ($sheet->cellExistsByColumnAndRow($column, $row)) {
-                            $rowData[$column] = Cell::stringFromColumnIndex($column) . $row;
+                            $rowData[$column] = Coordinate::stringFromColumnIndex($column) . $row;
                         } else {
                             $rowData[$column] = '';
                         }
@@ -565,11 +566,11 @@ class Html extends BaseWriter
             foreach ($pSheet->getChartCollection() as $chart) {
                 if ($chart instanceof Chart) {
                     $chartCoordinates = $chart->getTopLeftPosition();
-                    $chartTL = Cell::coordinateFromString($chartCoordinates['cell']);
-                    $chartCol = Cell::columnIndexFromString($chartTL[0]);
+                    $chartTL = Coordinate::coordinateFromString($chartCoordinates['cell']);
+                    $chartCol = Coordinate::columnIndexFromString($chartTL[0]);
                     if ($chartTL[1] > $rowMax) {
                         $rowMax = $chartTL[1];
-                        if ($chartCol > Cell::columnIndexFromString($colMax)) {
+                        if ($chartCol > Coordinate::columnIndexFromString($colMax)) {
                             $colMax = $chartTL[0];
                         }
                     }
@@ -579,11 +580,11 @@ class Html extends BaseWriter
 
         foreach ($pSheet->getDrawingCollection() as $drawing) {
             if ($drawing instanceof Drawing) {
-                $imageTL = Cell::coordinateFromString($drawing->getCoordinates());
-                $imageCol = Cell::columnIndexFromString($imageTL[0]);
+                $imageTL = Coordinate::coordinateFromString($drawing->getCoordinates());
+                $imageCol = Coordinate::columnIndexFromString($imageTL[0]);
                 if ($imageTL[1] > $rowMax) {
                     $rowMax = $imageTL[1];
-                    if ($imageCol > Cell::columnIndexFromString($colMax)) {
+                    if ($imageCol > Coordinate::columnIndexFromString($colMax)) {
                         $colMax = $imageTL[0];
                     }
                 }
@@ -880,7 +881,7 @@ class Html extends BaseWriter
             $sheet->calculateColumnWidths();
 
             // col elements, initialize
-            $highestColumnIndex = Cell::columnIndexFromString($sheet->getHighestColumn()) - 1;
+            $highestColumnIndex = Coordinate::columnIndexFromString($sheet->getHighestColumn()) - 1;
             $column = -1;
             while ($column++ < $highestColumnIndex) {
                 $this->columnWidths[$sheetIndex][$column] = 42; // approximation
@@ -891,7 +892,7 @@ class Html extends BaseWriter
             foreach ($sheet->getColumnDimensions() as $columnDimension) {
                 if (($width = SharedDrawing::cellDimensionToPixels($columnDimension->getWidth(), $this->defaultFont)) >= 0) {
                     $width = SharedDrawing::pixelsToPoints($width);
-                    $column = Cell::columnIndexFromString($columnDimension->getColumnIndex()) - 1;
+                    $column = Coordinate::columnIndexFromString($columnDimension->getColumnIndex()) - 1;
                     $this->columnWidths[$sheetIndex][$column] = $width;
                     $css['table.sheet' . $sheetIndex . ' col.col' . $column]['width'] = $width . 'pt';
 
@@ -1129,7 +1130,7 @@ class Html extends BaseWriter
         }
 
         // Write <col> elements
-        $highestColumnIndex = Cell::columnIndexFromString($pSheet->getHighestColumn()) - 1;
+        $highestColumnIndex = Coordinate::columnIndexFromString($pSheet->getHighestColumn()) - 1;
         $i = -1;
         while ($i++ < $highestColumnIndex) {
             if (!$this->isPdf) {
@@ -1209,7 +1210,7 @@ class Html extends BaseWriter
         $colNum = 0;
         foreach ($pValues as $cellAddress) {
             $cell = ($cellAddress > '') ? $pSheet->getCell($cellAddress) : '';
-            $coordinate = Cell::stringFromColumnIndex($colNum) . ($pRow + 1);
+            $coordinate = Coordinate::stringFromColumnIndex($colNum) . ($pRow + 1);
             if (!$this->useInlineCss) {
                 $cssClass = 'column' . $colNum;
             } else {
@@ -1339,7 +1340,7 @@ class Html extends BaseWriter
 
                 //    Also apply style from last cell in merge to fix borders -
                 //        relies on !important for non-none border declarations in createCSSStyleBorder
-                $endCellCoord = Cell::stringFromColumnIndex($colNum + $colSpan - 1) . ($pRow + $rowSpan);
+                $endCellCoord = Coordinate::stringFromColumnIndex($colNum + $colSpan - 1) . ($pRow + $rowSpan);
                 if (!$this->useInlineCss) {
                     $cssClass .= ' style' . $pSheet->getCell($endCellCoord)->getXfIndex();
                 }
@@ -1549,15 +1550,15 @@ class Html extends BaseWriter
 
             // loop through all Excel merged cells
             foreach ($sheet->getMergeCells() as $cells) {
-                list($cells) = Cell::splitRange($cells);
+                list($cells) = Coordinate::splitRange($cells);
                 $first = $cells[0];
                 $last = $cells[1];
 
-                list($fc, $fr) = Cell::coordinateFromString($first);
-                $fc = Cell::columnIndexFromString($fc) - 1;
+                list($fc, $fr) = Coordinate::coordinateFromString($first);
+                $fc = Coordinate::columnIndexFromString($fc) - 1;
 
-                list($lc, $lr) = Cell::coordinateFromString($last);
-                $lc = Cell::columnIndexFromString($lc) - 1;
+                list($lc, $lr) = Coordinate::coordinateFromString($last);
+                $lc = Coordinate::columnIndexFromString($lc) - 1;
 
                 // loop through the individual cells in the individual merge
                 $r = $fr - 1;
@@ -1587,7 +1588,7 @@ class Html extends BaseWriter
 
             // Identify which rows should be omitted in HTML. These are the rows where all the cells
             //   participate in a merge and the where base cells are somewhere above.
-            $countColumns = Cell::columnIndexFromString($sheet->getHighestColumn());
+            $countColumns = Coordinate::columnIndexFromString($sheet->getHighestColumn());
             foreach ($candidateSpannedRow as $rowIndex) {
                 if (isset($this->isSpannedCell[$sheetIndex][$rowIndex])) {
                     if (count($this->isSpannedCell[$sheetIndex][$rowIndex]) == $countColumns) {
diff --git a/src/PhpSpreadsheet/Writer/Ods/Content.php b/src/PhpSpreadsheet/Writer/Ods/Content.php
index 565037d8..69d31eff 100644
--- a/src/PhpSpreadsheet/Writer/Ods/Content.php
+++ b/src/PhpSpreadsheet/Writer/Ods/Content.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Ods;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Shared\XMLWriter;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
@@ -179,7 +179,7 @@ class Content extends WriterPart
         while ($cells->valid()) {
             /** @var \PhpOffice\PhpSpreadsheet\Cell\Cell $cell */
             $cell = $cells->current();
-            $column = Cell::columnIndexFromString($cell->getColumn()) - 1;
+            $column = Coordinate::columnIndexFromString($cell->getColumn()) - 1;
 
             $this->writeCellSpan($objWriter, $column, $prevColumn);
             $objWriter->startElement('table:table-cell');
diff --git a/src/PhpSpreadsheet/Writer/Xls.php b/src/PhpSpreadsheet/Writer/Xls.php
index 74ce74a9..effa3782 100644
--- a/src/PhpSpreadsheet/Writer/Xls.php
+++ b/src/PhpSpreadsheet/Writer/Xls.php
@@ -4,7 +4,7 @@ namespace PhpOffice\PhpSpreadsheet\Writer;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\RichText\RichText;
 use PhpOffice\PhpSpreadsheet\RichText\Run;
 use PhpOffice\PhpSpreadsheet\Shared\Drawing as SharedDrawing;
@@ -323,7 +323,7 @@ class Xls extends BaseWriter
 
             // AutoFilters
             if (!empty($filterRange)) {
-                $rangeBounds = Cell::rangeBoundaries($filterRange);
+                $rangeBounds = Coordinate::rangeBoundaries($filterRange);
                 $iNumColStart = $rangeBounds[0][0];
                 $iNumColEnd = $rangeBounds[1][0];
 
@@ -334,7 +334,7 @@ class Xls extends BaseWriter
                     // create an Drawing Object for the dropdown
                     $oDrawing = new BaseDrawing();
                     // get the coordinates of drawing
-                    $cDrawing = Cell::stringFromColumnIndex($iInc - 1) . $rangeBounds[0][1];
+                    $cDrawing = Coordinate::stringFromColumnIndex($iInc - 1) . $rangeBounds[0][1];
                     $oDrawing->setCoordinates($cDrawing);
                     $oDrawing->setWorksheet($sheet);
 
@@ -363,7 +363,7 @@ class Xls extends BaseWriter
                     $spContainer->setOPT(0x03BF, 0x000A0000); // Group Shape -> fPrint
 
                     // set coordinates and offsets, client anchor
-                    $endCoordinates = Cell::stringFromColumnIndex($iInc - 1);
+                    $endCoordinates = Coordinate::stringFromColumnIndex($iInc - 1);
                     $endCoordinates .= $rangeBounds[0][1] + 1;
 
                     $spContainer->setStartCoordinates($cDrawing);
diff --git a/src/PhpSpreadsheet/Writer/Xls/Escher.php b/src/PhpSpreadsheet/Writer/Xls/Escher.php
index 3811df5d..ca811657 100644
--- a/src/PhpSpreadsheet/Writer/Xls/Escher.php
+++ b/src/PhpSpreadsheet/Writer/Xls/Escher.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Xls;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer;
 use PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer\SpgrContainer;
 use PhpOffice\PhpSpreadsheet\Shared\Escher\DgContainer\SpgrContainer\SpContainer;
@@ -421,8 +421,8 @@ class Escher
                     $recType = 0xF010;
 
                     // start coordinates
-                    list($column, $row) = Cell::coordinateFromString($this->object->getStartCoordinates());
-                    $c1 = Cell::columnIndexFromString($column) - 1;
+                    list($column, $row) = Coordinate::coordinateFromString($this->object->getStartCoordinates());
+                    $c1 = Coordinate::columnIndexFromString($column) - 1;
                     $r1 = $row - 1;
 
                     // start offsetX
@@ -432,8 +432,8 @@ class Escher
                     $startOffsetY = $this->object->getStartOffsetY();
 
                     // end coordinates
-                    list($column, $row) = Cell::coordinateFromString($this->object->getEndCoordinates());
-                    $c2 = Cell::columnIndexFromString($column) - 1;
+                    list($column, $row) = Coordinate::coordinateFromString($this->object->getEndCoordinates());
+                    $c2 = Coordinate::columnIndexFromString($column) - 1;
                     $r2 = $row - 1;
 
                     // end offsetX
diff --git a/src/PhpSpreadsheet/Writer/Xls/Workbook.php b/src/PhpSpreadsheet/Writer/Xls/Workbook.php
index d8cc0464..c083a626 100644
--- a/src/PhpSpreadsheet/Writer/Xls/Workbook.php
+++ b/src/PhpSpreadsheet/Writer/Xls/Workbook.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Xls;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 use PhpOffice\PhpSpreadsheet\Shared\Date;
 use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
@@ -542,14 +542,14 @@ class Workbook extends BIFFwriter
             $namedRanges = $this->spreadsheet->getNamedRanges();
             foreach ($namedRanges as $namedRange) {
                 // Create absolute coordinate
-                $range = Cell::splitRange($namedRange->getRange());
+                $range = Coordinate::splitRange($namedRange->getRange());
                 for ($i = 0; $i < count($range); ++$i) {
-                    $range[$i][0] = '\'' . str_replace("'", "''", $namedRange->getWorksheet()->getTitle()) . '\'!' . Cell::absoluteCoordinate($range[$i][0]);
+                    $range[$i][0] = '\'' . str_replace("'", "''", $namedRange->getWorksheet()->getTitle()) . '\'!' . Coordinate::absoluteCoordinate($range[$i][0]);
                     if (isset($range[$i][1])) {
-                        $range[$i][1] = Cell::absoluteCoordinate($range[$i][1]);
+                        $range[$i][1] = Coordinate::absoluteCoordinate($range[$i][1]);
                     }
                 }
-                $range = Cell::buildRange($range); // e.g. Sheet1!$A$1:$B$2
+                $range = Coordinate::buildRange($range); // e.g. Sheet1!$A$1:$B$2
 
                 // parse formula
                 try {
@@ -584,8 +584,8 @@ class Workbook extends BIFFwriter
             // simultaneous repeatColumns repeatRows
             if ($sheetSetup->isColumnsToRepeatAtLeftSet() && $sheetSetup->isRowsToRepeatAtTopSet()) {
                 $repeat = $sheetSetup->getColumnsToRepeatAtLeft();
-                $colmin = Cell::columnIndexFromString($repeat[0]) - 1;
-                $colmax = Cell::columnIndexFromString($repeat[1]) - 1;
+                $colmin = Coordinate::columnIndexFromString($repeat[0]) - 1;
+                $colmax = Coordinate::columnIndexFromString($repeat[1]) - 1;
 
                 $repeat = $sheetSetup->getRowsToRepeatAtTop();
                 $rowmin = $repeat[0] - 1;
@@ -605,8 +605,8 @@ class Workbook extends BIFFwriter
                 // Columns to repeat
                 if ($sheetSetup->isColumnsToRepeatAtLeftSet()) {
                     $repeat = $sheetSetup->getColumnsToRepeatAtLeft();
-                    $colmin = Cell::columnIndexFromString($repeat[0]) - 1;
-                    $colmax = Cell::columnIndexFromString($repeat[1]) - 1;
+                    $colmin = Coordinate::columnIndexFromString($repeat[0]) - 1;
+                    $colmax = Coordinate::columnIndexFromString($repeat[1]) - 1;
                 } else {
                     $colmin = 0;
                     $colmax = 255;
@@ -634,19 +634,19 @@ class Workbook extends BIFFwriter
             $sheetSetup = $this->spreadsheet->getSheet($i)->getPageSetup();
             if ($sheetSetup->isPrintAreaSet()) {
                 // Print area, e.g. A3:J6,H1:X20
-                $printArea = Cell::splitRange($sheetSetup->getPrintArea());
+                $printArea = Coordinate::splitRange($sheetSetup->getPrintArea());
                 $countPrintArea = count($printArea);
 
                 $formulaData = '';
                 for ($j = 0; $j < $countPrintArea; ++$j) {
                     $printAreaRect = $printArea[$j]; // e.g. A3:J6
-                    $printAreaRect[0] = Cell::coordinateFromString($printAreaRect[0]);
-                    $printAreaRect[1] = Cell::coordinateFromString($printAreaRect[1]);
+                    $printAreaRect[0] = Coordinate::coordinateFromString($printAreaRect[0]);
+                    $printAreaRect[1] = Coordinate::coordinateFromString($printAreaRect[1]);
 
                     $print_rowmin = $printAreaRect[0][1] - 1;
                     $print_rowmax = $printAreaRect[1][1] - 1;
-                    $print_colmin = Cell::columnIndexFromString($printAreaRect[0][0]) - 1;
-                    $print_colmax = Cell::columnIndexFromString($printAreaRect[1][0]) - 1;
+                    $print_colmin = Coordinate::columnIndexFromString($printAreaRect[0][0]) - 1;
+                    $print_colmax = Coordinate::columnIndexFromString($printAreaRect[1][0]) - 1;
 
                     // construct formula data manually because parser does not recognize absolute 3d cell references
                     $formulaData .= pack('Cvvvvv', 0x3B, $i, $print_rowmin, $print_rowmax, $print_colmin, $print_colmax);
@@ -666,7 +666,7 @@ class Workbook extends BIFFwriter
             $sheetAutoFilter = $this->spreadsheet->getSheet($i)->getAutoFilter();
             $autoFilterRange = $sheetAutoFilter->getRange();
             if (!empty($autoFilterRange)) {
-                $rangeBounds = Cell::rangeBoundaries($autoFilterRange);
+                $rangeBounds = Coordinate::rangeBoundaries($autoFilterRange);
 
                 //Autofilter built in name
                 $name = pack('C', 0x0D);
diff --git a/src/PhpSpreadsheet/Writer/Xls/Worksheet.php b/src/PhpSpreadsheet/Writer/Xls/Worksheet.php
index 47b0ff93..96600169 100644
--- a/src/PhpSpreadsheet/Writer/Xls/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xls/Worksheet.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Xls;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\DataType;
 use PhpOffice\PhpSpreadsheet\Cell\DataValidation;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
@@ -260,8 +260,8 @@ class Worksheet extends BIFFwriter
         // Determine lowest and highest column and row
         $this->lastRowIndex = ($maxR > 65535) ? 65535 : $maxR;
 
-        $this->firstColumnIndex = Cell::columnIndexFromString($minC);
-        $this->lastColumnIndex = Cell::columnIndexFromString($maxC);
+        $this->firstColumnIndex = Coordinate::columnIndexFromString($minC);
+        $this->lastColumnIndex = Coordinate::columnIndexFromString($maxC);
 
 //        if ($this->firstColumnIndex > 255) $this->firstColumnIndex = 255;
         if ($this->lastColumnIndex > 255) {
@@ -310,7 +310,7 @@ class Worksheet extends BIFFwriter
 
             $width = $defaultWidth;
 
-            $columnLetter = Cell::stringFromColumnIndex($i);
+            $columnLetter = Coordinate::stringFromColumnIndex($i);
             if (isset($columnDimensions[$columnLetter])) {
                 $columnDimension = $columnDimensions[$columnLetter];
                 if ($columnDimension->getWidth() >= 0) {
@@ -395,7 +395,7 @@ class Worksheet extends BIFFwriter
         foreach ($phpSheet->getCoordinates() as $coordinate) {
             $cell = $phpSheet->getCell($coordinate);
             $row = $cell->getRow() - 1;
-            $column = Cell::columnIndexFromString($cell->getColumn()) - 1;
+            $column = Coordinate::columnIndexFromString($cell->getColumn()) - 1;
 
             // Don't break Excel break the code!
             if ($row > 65535 || $column > 255) {
@@ -479,7 +479,7 @@ class Worksheet extends BIFFwriter
 
         // Hyperlinks
         foreach ($phpSheet->getHyperLinkCollection() as $coordinate => $hyperlink) {
-            list($column, $row) = Cell::coordinateFromString($coordinate);
+            list($column, $row) = Coordinate::coordinateFromString($coordinate);
 
             $url = $hyperlink->getUrl();
 
@@ -493,7 +493,7 @@ class Worksheet extends BIFFwriter
                 $url = 'external:' . $url;
             }
 
-            $this->writeUrl($row - 1, Cell::columnIndexFromString($column) - 1, $url);
+            $this->writeUrl($row - 1, Coordinate::columnIndexFromString($column) - 1, $url);
         }
 
         $this->writeDataValidity();
@@ -552,10 +552,10 @@ class Worksheet extends BIFFwriter
             $lastCell = $explodes[1];
         }
 
-        $firstCellCoordinates = Cell::coordinateFromString($firstCell); // e.g. array(0, 1)
-        $lastCellCoordinates = Cell::coordinateFromString($lastCell); // e.g. array(1, 6)
+        $firstCellCoordinates = Coordinate::coordinateFromString($firstCell); // e.g. array(0, 1)
+        $lastCellCoordinates = Coordinate::coordinateFromString($lastCell); // e.g. array(1, 6)
 
-        return pack('vvvv', $firstCellCoordinates[1] - 1, $lastCellCoordinates[1] - 1, Cell::columnIndexFromString($firstCellCoordinates[0]) - 1, Cell::columnIndexFromString($lastCellCoordinates[0]) - 1);
+        return pack('vvvv', $firstCellCoordinates[1] - 1, $lastCellCoordinates[1] - 1, Coordinate::columnIndexFromString($firstCellCoordinates[0]) - 1, Coordinate::columnIndexFromString($lastCellCoordinates[0]) - 1);
     }
 
     /**
@@ -1353,7 +1353,7 @@ class Worksheet extends BIFFwriter
     private function writeSelection()
     {
         // look up the selected cell range
-        $selectedCells = Cell::splitRange($this->phpSheet->getSelectedCells());
+        $selectedCells = Coordinate::splitRange($this->phpSheet->getSelectedCells());
         $selectedCells = $selectedCells[0];
         if (count($selectedCells) == 2) {
             list($first, $last) = $selectedCells;
@@ -1362,12 +1362,12 @@ class Worksheet extends BIFFwriter
             $last = $selectedCells[0];
         }
 
-        list($colFirst, $rwFirst) = Cell::coordinateFromString($first);
-        $colFirst = Cell::columnIndexFromString($colFirst) - 1; // base 0 column index
+        list($colFirst, $rwFirst) = Coordinate::coordinateFromString($first);
+        $colFirst = Coordinate::columnIndexFromString($colFirst) - 1; // base 0 column index
         --$rwFirst; // base 0 row index
 
-        list($colLast, $rwLast) = Cell::coordinateFromString($last);
-        $colLast = Cell::columnIndexFromString($colLast) - 1; // base 0 column index
+        list($colLast, $rwLast) = Coordinate::coordinateFromString($last);
+        $colLast = Coordinate::columnIndexFromString($colLast) - 1; // base 0 column index
         --$rwLast; // base 0 row index
 
         // make sure we are not out of bounds
@@ -1440,12 +1440,12 @@ class Worksheet extends BIFFwriter
             ++$j;
 
             // extract the row and column indexes
-            $range = Cell::splitRange($mergeCell);
+            $range = Coordinate::splitRange($mergeCell);
             list($first, $last) = $range[0];
-            list($firstColumn, $firstRow) = Cell::coordinateFromString($first);
-            list($lastColumn, $lastRow) = Cell::coordinateFromString($last);
+            list($firstColumn, $firstRow) = Coordinate::coordinateFromString($first);
+            list($lastColumn, $lastRow) = Coordinate::coordinateFromString($last);
 
-            $recordData .= pack('vvvv', $firstRow - 1, $lastRow - 1, Cell::columnIndexFromString($firstColumn) - 1, Cell::columnIndexFromString($lastColumn) - 1);
+            $recordData .= pack('vvvv', $firstRow - 1, $lastRow - 1, Coordinate::columnIndexFromString($firstColumn) - 1, Coordinate::columnIndexFromString($lastColumn) - 1);
 
             // flush record if we have reached limit for number of merged cells, or reached final merged cell
             if ($j == $maxCountMergeCellsPerRecord or $i == $countMergeCells) {
@@ -1590,9 +1590,9 @@ class Worksheet extends BIFFwriter
     {
         $panes = [];
         if ($freezePane = $this->phpSheet->getFreezePane()) {
-            list($column, $row) = Cell::coordinateFromString($freezePane);
+            list($column, $row) = Coordinate::coordinateFromString($freezePane);
             $panes[0] = $row - 1;
-            $panes[1] = Cell::columnIndexFromString($column) - 1;
+            $panes[1] = Coordinate::columnIndexFromString($column) - 1;
         } else {
             // thaw panes
             return;
@@ -1933,7 +1933,7 @@ class Worksheet extends BIFFwriter
         $record = 0x009D; // Record identifier
         $length = 0x0002; // Bytes to follow
 
-        $rangeBounds = Cell::rangeBoundaries($this->phpSheet->getAutoFilter()->getRange());
+        $rangeBounds = Coordinate::rangeBoundaries($this->phpSheet->getAutoFilter()->getRange());
         $iNumFilters = 1 + $rangeBounds[1][0] - $rangeBounds[0][0];
 
         $header = pack('vv', $record, $length);
@@ -2035,13 +2035,13 @@ class Worksheet extends BIFFwriter
 
         foreach ($this->phpSheet->getBreaks() as $cell => $breakType) {
             // Fetch coordinates
-            $coordinates = Cell::coordinateFromString($cell);
+            $coordinates = Coordinate::coordinateFromString($cell);
 
             // Decide what to do by the type of break
             switch ($breakType) {
                 case \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet::BREAK_COLUMN:
                     // Add to list of vertical breaks
-                    $vbreaks[] = Cell::columnIndexFromString($coordinates[0]) - 1;
+                    $vbreaks[] = Coordinate::columnIndexFromString($coordinates[0]) - 1;
 
                     break;
                 case \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet::BREAK_ROW:
@@ -2288,7 +2288,7 @@ class Worksheet extends BIFFwriter
         $row_end = $row_start; // Row containing bottom right corner of object
 
         // Zero the specified offset if greater than the cell dimensions
-        if ($x1 >= Xls::sizeCol($this->phpSheet, Cell::stringFromColumnIndex($col_start))) {
+        if ($x1 >= Xls::sizeCol($this->phpSheet, Coordinate::stringFromColumnIndex($col_start))) {
             $x1 = 0;
         }
         if ($y1 >= Xls::sizeRow($this->phpSheet, $row_start + 1)) {
@@ -2299,8 +2299,8 @@ class Worksheet extends BIFFwriter
         $height = $height + $y1 - 1;
 
         // Subtract the underlying cell widths to find the end cell of the image
-        while ($width >= Xls::sizeCol($this->phpSheet, Cell::stringFromColumnIndex($col_end))) {
-            $width -= Xls::sizeCol($this->phpSheet, Cell::stringFromColumnIndex($col_end));
+        while ($width >= Xls::sizeCol($this->phpSheet, Coordinate::stringFromColumnIndex($col_end))) {
+            $width -= Xls::sizeCol($this->phpSheet, Coordinate::stringFromColumnIndex($col_end));
             ++$col_end;
         }
 
@@ -2313,10 +2313,10 @@ class Worksheet extends BIFFwriter
         // Bitmap isn't allowed to start or finish in a hidden cell, i.e. a cell
         // with zero eight or width.
         //
-        if (Xls::sizeCol($this->phpSheet, Cell::stringFromColumnIndex($col_start)) == 0) {
+        if (Xls::sizeCol($this->phpSheet, Coordinate::stringFromColumnIndex($col_start)) == 0) {
             return;
         }
-        if (Xls::sizeCol($this->phpSheet, Cell::stringFromColumnIndex($col_end)) == 0) {
+        if (Xls::sizeCol($this->phpSheet, Coordinate::stringFromColumnIndex($col_end)) == 0) {
             return;
         }
         if (Xls::sizeRow($this->phpSheet, $row_start + 1) == 0) {
@@ -2327,9 +2327,9 @@ class Worksheet extends BIFFwriter
         }
 
         // Convert the pixel values to the percentage value expected by Excel
-        $x1 = $x1 / Xls::sizeCol($this->phpSheet, Cell::stringFromColumnIndex($col_start)) * 1024;
+        $x1 = $x1 / Xls::sizeCol($this->phpSheet, Coordinate::stringFromColumnIndex($col_start)) * 1024;
         $y1 = $y1 / Xls::sizeRow($this->phpSheet, $row_start + 1) * 256;
-        $x2 = $width / Xls::sizeCol($this->phpSheet, Cell::stringFromColumnIndex($col_end)) * 1024; // Distance to right side of object
+        $x2 = $width / Xls::sizeCol($this->phpSheet, Coordinate::stringFromColumnIndex($col_end)) * 1024; // Distance to right side of object
         $y2 = $height / Xls::sizeRow($this->phpSheet, $row_end + 1) * 256; // Distance to bottom of object
 
         $this->writeObjPicture($col_start, $x1, $row_start, $y1, $col_end, $x2, $row_end, $y2);
@@ -4413,9 +4413,9 @@ class Worksheet extends BIFFwriter
                         $arrConditional[] = $conditional->getHashCode();
                     }
                     // Cells
-                    $arrCoord = Cell::coordinateFromString($cellCoordinate);
+                    $arrCoord = Coordinate::coordinateFromString($cellCoordinate);
                     if (!is_numeric($arrCoord[0])) {
-                        $arrCoord[0] = Cell::columnIndexFromString($arrCoord[0]);
+                        $arrCoord[0] = Coordinate::columnIndexFromString($arrCoord[0]);
                     }
                     if ($numColumnMin === null || ($numColumnMin > $arrCoord[0])) {
                         $numColumnMin = $arrCoord[0];
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Comments.php b/src/PhpSpreadsheet/Writer/Xlsx/Comments.php
index f1f0400f..4f4f8c80 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Comments.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Comments.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Comment;
 use PhpOffice\PhpSpreadsheet\Shared\XMLWriter;
 
@@ -177,8 +177,8 @@ class Comments extends WriterPart
     private function writeVMLComment(XMLWriter $objWriter, $pCellReference, Comment $pComment)
     {
         // Metadata
-        list($column, $row) = Cell::coordinateFromString($pCellReference);
-        $column = Cell::columnIndexFromString($column);
+        list($column, $row) = Coordinate::coordinateFromString($pCellReference);
+        $column = Coordinate::columnIndexFromString($column);
         $id = 1024 + $column + $row;
         $id = substr($id, 0, 4);
 
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Drawing.php b/src/PhpSpreadsheet/Writer/Xlsx/Drawing.php
index b710e132..db5d3cce 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Drawing.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Drawing.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Shared\XMLWriter;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Worksheet\BaseDrawing;
@@ -77,20 +77,20 @@ class Drawing extends WriterPart
     public function writeChart(XMLWriter $objWriter, \PhpOffice\PhpSpreadsheet\Chart\Chart $pChart, $pRelationId = -1)
     {
         $tl = $pChart->getTopLeftPosition();
-        $tl['colRow'] = Cell::coordinateFromString($tl['cell']);
+        $tl['colRow'] = Coordinate::coordinateFromString($tl['cell']);
         $br = $pChart->getBottomRightPosition();
-        $br['colRow'] = Cell::coordinateFromString($br['cell']);
+        $br['colRow'] = Coordinate::coordinateFromString($br['cell']);
 
         $objWriter->startElement('xdr:twoCellAnchor');
 
         $objWriter->startElement('xdr:from');
-        $objWriter->writeElement('xdr:col', Cell::columnIndexFromString($tl['colRow'][0]) - 1);
+        $objWriter->writeElement('xdr:col', Coordinate::columnIndexFromString($tl['colRow'][0]) - 1);
         $objWriter->writeElement('xdr:colOff', \PhpOffice\PhpSpreadsheet\Shared\Drawing::pixelsToEMU($tl['xOffset']));
         $objWriter->writeElement('xdr:row', $tl['colRow'][1] - 1);
         $objWriter->writeElement('xdr:rowOff', \PhpOffice\PhpSpreadsheet\Shared\Drawing::pixelsToEMU($tl['yOffset']));
         $objWriter->endElement();
         $objWriter->startElement('xdr:to');
-        $objWriter->writeElement('xdr:col', Cell::columnIndexFromString($br['colRow'][0]) - 1);
+        $objWriter->writeElement('xdr:col', Coordinate::columnIndexFromString($br['colRow'][0]) - 1);
         $objWriter->writeElement('xdr:colOff', \PhpOffice\PhpSpreadsheet\Shared\Drawing::pixelsToEMU($br['xOffset']));
         $objWriter->writeElement('xdr:row', $br['colRow'][1] - 1);
         $objWriter->writeElement('xdr:rowOff', \PhpOffice\PhpSpreadsheet\Shared\Drawing::pixelsToEMU($br['yOffset']));
@@ -153,8 +153,8 @@ class Drawing extends WriterPart
             // xdr:oneCellAnchor
             $objWriter->startElement('xdr:oneCellAnchor');
             // Image location
-            $aCoordinates = Cell::coordinateFromString($pDrawing->getCoordinates());
-            $aCoordinates[0] = Cell::columnIndexFromString($aCoordinates[0]);
+            $aCoordinates = Coordinate::coordinateFromString($pDrawing->getCoordinates());
+            $aCoordinates[0] = Coordinate::columnIndexFromString($aCoordinates[0]);
 
             // xdr:from
             $objWriter->startElement('xdr:from');
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Workbook.php b/src/PhpSpreadsheet/Writer/Xlsx/Workbook.php
index c56db3ed..b208466a 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Workbook.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Workbook.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\NamedRange;
 use PhpOffice\PhpSpreadsheet\Shared\Date;
 use PhpOffice\PhpSpreadsheet\Shared\XMLWriter;
@@ -314,14 +314,14 @@ class Workbook extends WriterPart
         }
 
         // Create absolute coordinate and write as raw text
-        $range = Cell::splitRange($pNamedRange->getRange());
+        $range = Coordinate::splitRange($pNamedRange->getRange());
         for ($i = 0; $i < count($range); ++$i) {
-            $range[$i][0] = '\'' . str_replace("'", "''", $pNamedRange->getWorksheet()->getTitle()) . '\'!' . Cell::absoluteReference($range[$i][0]);
+            $range[$i][0] = '\'' . str_replace("'", "''", $pNamedRange->getWorksheet()->getTitle()) . '\'!' . Coordinate::absoluteReference($range[$i][0]);
             if (isset($range[$i][1])) {
-                $range[$i][1] = Cell::absoluteReference($range[$i][1]);
+                $range[$i][1] = Coordinate::absoluteReference($range[$i][1]);
             }
         }
-        $range = Cell::buildRange($range);
+        $range = Coordinate::buildRange($range);
 
         $objWriter->writeRawData($range);
 
@@ -348,15 +348,15 @@ class Workbook extends WriterPart
             $objWriter->writeAttribute('hidden', '1');
 
             // Create absolute coordinate and write as raw text
-            $range = Cell::splitRange($autoFilterRange);
+            $range = Coordinate::splitRange($autoFilterRange);
             $range = $range[0];
             //    Strip any worksheet ref so we can make the cell ref absolute
             if (strpos($range[0], '!') !== false) {
                 list($ws, $range[0]) = explode('!', $range[0]);
             }
 
-            $range[0] = Cell::absoluteCoordinate($range[0]);
-            $range[1] = Cell::absoluteCoordinate($range[1]);
+            $range[0] = Coordinate::absoluteCoordinate($range[0]);
+            $range[1] = Coordinate::absoluteCoordinate($range[1]);
             $range = implode(':', $range);
 
             $objWriter->writeRawData('\'' . str_replace("'", "''", $pSheet->getTitle()) . '\'!' . $range);
@@ -427,12 +427,12 @@ class Workbook extends WriterPart
             $objWriter->writeAttribute('localSheetId', $pSheetId);
 
             // Print area
-            $printArea = Cell::splitRange($pSheet->getPageSetup()->getPrintArea());
+            $printArea = Coordinate::splitRange($pSheet->getPageSetup()->getPrintArea());
 
             $chunks = [];
             foreach ($printArea as $printAreaRect) {
-                $printAreaRect[0] = Cell::absoluteReference($printAreaRect[0]);
-                $printAreaRect[1] = Cell::absoluteReference($printAreaRect[1]);
+                $printAreaRect[0] = Coordinate::absoluteReference($printAreaRect[0]);
+                $printAreaRect[1] = Coordinate::absoluteReference($printAreaRect[1]);
                 $chunks[] = '\'' . str_replace("'", "''", $pSheet->getTitle()) . '\'!' . implode(':', $printAreaRect);
             }
 
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 3a2ceabe..17a80205 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
 
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\RichText\RichText;
 use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
 use PhpOffice\PhpSpreadsheet\Shared\XMLWriter;
@@ -249,8 +250,8 @@ class Worksheet extends WriterPart
             // Calculate freeze coordinates
             $xSplit = $ySplit = 0;
 
-            list($xSplit, $ySplit) = Cell::coordinateFromString($topLeftCell);
-            $xSplit = Cell::columnIndexFromString($xSplit);
+            list($xSplit, $ySplit) = Coordinate::coordinateFromString($topLeftCell);
+            $xSplit = Coordinate::columnIndexFromString($xSplit);
 
             // pane
             $pane = 'topRight';
@@ -367,8 +368,8 @@ class Worksheet extends WriterPart
             foreach ($pSheet->getColumnDimensions() as $colDimension) {
                 // col
                 $objWriter->startElement('col');
-                $objWriter->writeAttribute('min', Cell::columnIndexFromString($colDimension->getColumnIndex()));
-                $objWriter->writeAttribute('max', Cell::columnIndexFromString($colDimension->getColumnIndex()));
+                $objWriter->writeAttribute('min', Coordinate::columnIndexFromString($colDimension->getColumnIndex()));
+                $objWriter->writeAttribute('max', Coordinate::columnIndexFromString($colDimension->getColumnIndex()));
 
                 if ($colDimension->getWidth() < 0) {
                     // No width set, apply default of 10
@@ -538,7 +539,7 @@ class Worksheet extends WriterPart
 
         // Write data validations?
         if (!empty($dataValidationCollection)) {
-            $dataValidationCollection = Cell::mergeRangesInCollection($dataValidationCollection);
+            $dataValidationCollection = Coordinate::mergeRangesInCollection($dataValidationCollection);
             $objWriter->startElement('dataValidations');
             $objWriter->writeAttribute('count', count($dataValidationCollection));
 
@@ -753,7 +754,7 @@ class Worksheet extends WriterPart
             $objWriter->startElement('autoFilter');
 
             // Strip any worksheet reference from the filter coordinates
-            $range = Cell::splitRange($autoFilterRange);
+            $range = Coordinate::splitRange($autoFilterRange);
             $range = $range[0];
             //    Strip any worksheet ref
             if (strpos($range[0], '!') !== false) {
@@ -921,7 +922,7 @@ class Worksheet extends WriterPart
             $objWriter->writeAttribute('manualBreakCount', count($aRowBreaks));
 
             foreach ($aRowBreaks as $cell) {
-                $coords = Cell::coordinateFromString($cell);
+                $coords = Coordinate::coordinateFromString($cell);
 
                 $objWriter->startElement('brk');
                 $objWriter->writeAttribute('id', $coords[1]);
@@ -939,10 +940,10 @@ class Worksheet extends WriterPart
             $objWriter->writeAttribute('manualBreakCount', count($aColumnBreaks));
 
             foreach ($aColumnBreaks as $cell) {
-                $coords = Cell::coordinateFromString($cell);
+                $coords = Coordinate::coordinateFromString($cell);
 
                 $objWriter->startElement('brk');
-                $objWriter->writeAttribute('id', Cell::columnIndexFromString($coords[0]) - 1);
+                $objWriter->writeAttribute('id', Coordinate::columnIndexFromString($coords[0]) - 1);
                 $objWriter->writeAttribute('man', '1');
                 $objWriter->endElement();
             }
@@ -969,7 +970,7 @@ class Worksheet extends WriterPart
         $objWriter->startElement('sheetData');
 
         // Get column count
-        $colCount = Cell::columnIndexFromString($pSheet->getHighestColumn());
+        $colCount = Coordinate::columnIndexFromString($pSheet->getHighestColumn());
 
         // Highest row number
         $highestRow = $pSheet->getHighestRow();
@@ -977,7 +978,7 @@ class Worksheet extends WriterPart
         // Loop through cells
         $cellsByRow = [];
         foreach ($pSheet->getCoordinates() as $coordinate) {
-            $cellAddress = Cell::coordinateFromString($coordinate);
+            $cellAddress = Coordinate::coordinateFromString($coordinate);
             $cellsByRow[$cellAddress[1]][] = $coordinate;
         }
 
diff --git a/tests/PhpSpreadsheetTests/Cell/CellTest.php b/tests/PhpSpreadsheetTests/Cell/CoordinateTest.php
similarity index 86%
rename from tests/PhpSpreadsheetTests/Cell/CellTest.php
rename to tests/PhpSpreadsheetTests/Cell/CoordinateTest.php
index 821a9f5b..41235f6d 100644
--- a/tests/PhpSpreadsheetTests/Cell/CellTest.php
+++ b/tests/PhpSpreadsheetTests/Cell/CoordinateTest.php
@@ -2,11 +2,11 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Cell;
 
-use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Exception;
 use PHPUnit\Framework\TestCase;
 
-class CellTest extends TestCase
+class CoordinateTest extends TestCase
 {
     /**
      * @dataProvider providerColumnString
@@ -15,7 +15,7 @@ class CellTest extends TestCase
      */
     public function testColumnIndexFromString($expectedResult, ...$args)
     {
-        $result = Cell::columnIndexFromString(...$args);
+        $result = Coordinate::columnIndexFromString(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -29,7 +29,7 @@ class CellTest extends TestCase
         $cellAddress = 'ABCD';
 
         try {
-            Cell::columnIndexFromString($cellAddress);
+            Coordinate::columnIndexFromString($cellAddress);
         } catch (\Exception $e) {
             self::assertInstanceOf(Exception::class, $e);
             self::assertEquals($e->getMessage(), 'Column string index can not be longer than 3 characters');
@@ -44,7 +44,7 @@ class CellTest extends TestCase
         $cellAddress = '';
 
         try {
-            Cell::columnIndexFromString($cellAddress);
+            Coordinate::columnIndexFromString($cellAddress);
         } catch (\Exception $e) {
             self::assertInstanceOf(Exception::class, $e);
             self::assertEquals($e->getMessage(), 'Column string index can not be empty');
@@ -61,7 +61,7 @@ class CellTest extends TestCase
      */
     public function testStringFromColumnIndex($expectedResult, ...$args)
     {
-        $result = Cell::stringFromColumnIndex(...$args);
+        $result = Coordinate::stringFromColumnIndex(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -77,7 +77,7 @@ class CellTest extends TestCase
      */
     public function testCoordinateFromString($expectedResult, ...$args)
     {
-        $result = Cell::coordinateFromString(...$args);
+        $result = Coordinate::coordinateFromString(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -91,7 +91,7 @@ class CellTest extends TestCase
         $cellAddress = 'A1:AI2012';
 
         try {
-            Cell::coordinateFromString($cellAddress);
+            Coordinate::coordinateFromString($cellAddress);
         } catch (\Exception $e) {
             self::assertInstanceOf(Exception::class, $e);
             self::assertEquals($e->getMessage(), 'Cell coordinate string can not be a range of cells');
@@ -106,7 +106,7 @@ class CellTest extends TestCase
         $cellAddress = '';
 
         try {
-            Cell::coordinateFromString($cellAddress);
+            Coordinate::coordinateFromString($cellAddress);
         } catch (\Exception $e) {
             self::assertInstanceOf(Exception::class, $e);
             self::assertEquals($e->getMessage(), 'Cell coordinate can not be zero-length string');
@@ -121,7 +121,7 @@ class CellTest extends TestCase
         $cellAddress = 'AI';
 
         try {
-            Cell::coordinateFromString($cellAddress);
+            Coordinate::coordinateFromString($cellAddress);
         } catch (\Exception $e) {
             self::assertInstanceOf(Exception::class, $e);
             self::assertEquals($e->getMessage(), 'Invalid cell coordinate ' . $cellAddress);
@@ -138,7 +138,7 @@ class CellTest extends TestCase
      */
     public function testAbsoluteCoordinateFromString($expectedResult, ...$args)
     {
-        $result = Cell::absoluteCoordinate(...$args);
+        $result = Coordinate::absoluteCoordinate(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -152,7 +152,7 @@ class CellTest extends TestCase
         $cellAddress = 'A1:AI2012';
 
         try {
-            Cell::absoluteCoordinate($cellAddress);
+            Coordinate::absoluteCoordinate($cellAddress);
         } catch (\Exception $e) {
             self::assertInstanceOf(Exception::class, $e);
             self::assertEquals($e->getMessage(), 'Cell coordinate string can not be a range of cells');
@@ -169,7 +169,7 @@ class CellTest extends TestCase
      */
     public function testAbsoluteReferenceFromString($expectedResult, ...$args)
     {
-        $result = Cell::absoluteReference(...$args);
+        $result = Coordinate::absoluteReference(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -183,7 +183,7 @@ class CellTest extends TestCase
         $cellAddress = 'A1:AI2012';
 
         try {
-            Cell::absoluteReference($cellAddress);
+            Coordinate::absoluteReference($cellAddress);
         } catch (\Exception $e) {
             self::assertInstanceOf(Exception::class, $e);
             self::assertEquals($e->getMessage(), 'Cell coordinate string can not be a range of cells');
@@ -200,7 +200,7 @@ class CellTest extends TestCase
      */
     public function testSplitRange($expectedResult, ...$args)
     {
-        $result = Cell::splitRange(...$args);
+        $result = Coordinate::splitRange(...$args);
         foreach ($result as $key => $split) {
             if (!is_array($expectedResult[$key])) {
                 self::assertEquals($expectedResult[$key], $split[0]);
@@ -222,7 +222,7 @@ class CellTest extends TestCase
      */
     public function testBuildRange($expectedResult, ...$args)
     {
-        $result = Cell::buildRange(...$args);
+        $result = Coordinate::buildRange(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -241,7 +241,7 @@ class CellTest extends TestCase
         }
 
         $cellRange = '';
-        Cell::buildRange($cellRange);
+        Coordinate::buildRange($cellRange);
     }
 
     /**
@@ -251,7 +251,7 @@ class CellTest extends TestCase
      */
     public function testRangeBoundaries($expectedResult, ...$args)
     {
-        $result = Cell::rangeBoundaries(...$args);
+        $result = Coordinate::rangeBoundaries(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -267,7 +267,7 @@ class CellTest extends TestCase
      */
     public function testRangeDimension($expectedResult, ...$args)
     {
-        $result = Cell::rangeDimension(...$args);
+        $result = Coordinate::rangeDimension(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -283,7 +283,7 @@ class CellTest extends TestCase
      */
     public function testGetRangeBoundaries($expectedResult, ...$args)
     {
-        $result = Cell::getRangeBoundaries(...$args);
+        $result = Coordinate::getRangeBoundaries(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -299,7 +299,7 @@ class CellTest extends TestCase
      */
     public function testExtractAllCellReferencesInRange($expectedResult, ...$args)
     {
-        $result = Cell::extractAllCellReferencesInRange(...$args);
+        $result = Coordinate::extractAllCellReferencesInRange(...$args);
         self::assertEquals($expectedResult, $result);
     }
 
@@ -315,7 +315,7 @@ class CellTest extends TestCase
      */
     public function testMergeRangesInCollection($expectedResult, ...$args)
     {
-        $result = Cell::mergeRangesInCollection(...$args);
+        $result = Coordinate::mergeRangesInCollection(...$args);
         self::assertEquals($expectedResult, $result);
     }