diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80a6253a..fea9e22c 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,10 @@ This is the changelog between releases of PHPWord. Releases are listed in revers
 - CheckBox: Ability to add checkbox in header/footer - @ivanlanin GH-187
 - Link: Ability to add link in header/footer - @ivanlanin GH-187
 - Object: Ability to add object in header, footer, textrun, and footnote - @ivanlanin GH-187
+- Media: Add `Media::reset()` to reset all media data - @juzi GH-19
+- Style: Add `Style::reset()` to reset all styles
+- Footnote: Add `Footnote::reset()` to reset all footnotes
+- TOC: Add `TOC::reset()` to reset all TOC
 
 ### Bugfixes
 
diff --git a/src/PhpWord/Footnote.php b/src/PhpWord/Footnote.php
index f656dc3a..1c11bbff 100644
--- a/src/PhpWord/Footnote.php
+++ b/src/PhpWord/Footnote.php
@@ -59,6 +59,14 @@ class Footnote
         return count(self::$elements);
     }
 
+    /**
+     * Reset footer elements
+     */
+    public static function reset()
+    {
+        self::$elements = array();
+    }
+
     /**
      * Add new Footnote Link Element
      *
diff --git a/src/PhpWord/Media.php b/src/PhpWord/Media.php
index d354e399..63c88361 100755
--- a/src/PhpWord/Media.php
+++ b/src/PhpWord/Media.php
@@ -145,6 +145,14 @@ class Media
         return $mediaElements;
     }
 
+    /**
+     * Reset media elements
+     */
+    public static function reset()
+    {
+        self::$media = array();
+    }
+
     /**
      * Add new Section Media Element
      *
diff --git a/src/PhpWord/Settings.php b/src/PhpWord/Settings.php
index 0fb8bad0..0af6cf72 100644
--- a/src/PhpWord/Settings.php
+++ b/src/PhpWord/Settings.php
@@ -23,7 +23,7 @@ class Settings
      *
      * @var boolean
      */
-    private static $_xmlWriterCompatibility = true;
+    private static $xmlWriterCompatibility = true;
 
     /**
      * Name of the class used for Zip file management
@@ -32,7 +32,7 @@ class Settings
      *
      * @var string
      */
-    private static $_zipClass = self::ZIPARCHIVE;
+    private static $zipClass = self::ZIPARCHIVE;
 
     /**
      * Set the compatibility option used by the XMLWriter
@@ -43,7 +43,7 @@ class Settings
     public static function setCompatibility($compatibility)
     {
         if (is_bool($compatibility)) {
-            self::$_xmlWriterCompatibility = $compatibility;
+            self::$xmlWriterCompatibility = $compatibility;
             return true;
         }
         return false;
@@ -56,7 +56,7 @@ class Settings
      */
     public static function getCompatibility()
     {
-        return self::$_xmlWriterCompatibility;
+        return self::$xmlWriterCompatibility;
     }
 
     /**
@@ -70,7 +70,7 @@ class Settings
     {
         if (($zipClass === self::PCLZIP) ||
             ($zipClass === self::ZIPARCHIVE)) {
-            self::$_zipClass = $zipClass;
+            self::$zipClass = $zipClass;
             return true;
         }
         return false;
@@ -86,6 +86,6 @@ class Settings
      */
     public static function getZipClass()
     {
-        return self::$_zipClass;
+        return self::$zipClass;
     } // function getZipClass()
 }
diff --git a/src/PhpWord/Style.php b/src/PhpWord/Style.php
index f7b8e4c6..3db67cb5 100755
--- a/src/PhpWord/Style.php
+++ b/src/PhpWord/Style.php
@@ -23,7 +23,7 @@ class Style
      *
      * @var array
      */
-    private static $_styleElements = array();
+    private static $styles = array();
 
     /**
      * Add paragraph style
@@ -33,17 +33,7 @@ class Style
      */
     public static function addParagraphStyle($styleName, $styles)
     {
-        if (!array_key_exists($styleName, self::$_styleElements)) {
-            $style = new Paragraph();
-            foreach ($styles as $key => $value) {
-                if (substr($key, 0, 1) != '_') {
-                    $key = '_' . $key;
-                }
-                $style->setStyleValue($key, $value);
-            }
-
-            self::$_styleElements[$styleName] = $style;
-        }
+        self::setStyleValues($styleName, $styles, new Paragraph());
     }
 
     /**
@@ -55,16 +45,7 @@ class Style
      */
     public static function addFontStyle($styleName, $styleFont, $styleParagraph = null)
     {
-        if (!array_key_exists($styleName, self::$_styleElements)) {
-            $font = new Font('text', $styleParagraph);
-            foreach ($styleFont as $key => $value) {
-                if (substr($key, 0, 1) != '_') {
-                    $key = '_' . $key;
-                }
-                $font->setStyleValue($key, $value);
-            }
-            self::$_styleElements[$styleName] = $font;
-        }
+        self::setStyleValues($styleName, $styleFont, new Font('text', $styleParagraph));
     }
 
     /**
@@ -75,17 +56,7 @@ class Style
      */
     public static function addLinkStyle($styleName, $styles)
     {
-        if (!array_key_exists($styleName, self::$_styleElements)) {
-            $style = new Font('link');
-            foreach ($styles as $key => $value) {
-                if (substr($key, 0, 1) != '_') {
-                    $key = '_' . $key;
-                }
-                $style->setStyleValue($key, $value);
-            }
-
-            self::$_styleElements[$styleName] = $style;
-        }
+        self::setStyleValues($styleName, $styles, new Font('link'));
     }
 
     /**
@@ -97,10 +68,10 @@ class Style
      */
     public static function addTableStyle($styleName, $styleTable, $styleFirstRow = null)
     {
-        if (!array_key_exists($styleName, self::$_styleElements)) {
+        if (!array_key_exists($styleName, self::$styles)) {
             $style = new Table($styleTable, $styleFirstRow);
 
-            self::$_styleElements[$styleName] = $style;
+            self::$styles[$styleName] = $style;
         }
     }
 
@@ -114,17 +85,15 @@ class Style
     public static function addTitleStyle($titleCount, $styleFont, $styleParagraph = null)
     {
         $styleName = 'Heading_' . $titleCount;
-        if (!array_key_exists($styleName, self::$_styleElements)) {
-            $font = new Font('title', $styleParagraph);
-            foreach ($styleFont as $key => $value) {
-                if (substr($key, 0, 1) != '_') {
-                    $key = '_' . $key;
-                }
-                $font->setStyleValue($key, $value);
-            }
+        self::setStyleValues("Heading_{$titleCount}", $styleFont, new Font('title', $styleParagraph));
+    }
 
-            self::$_styleElements[$styleName] = $font;
-        }
+    /**
+     * Reset styles
+     */
+    public static function reset()
+    {
+        self::$styles = array();
     }
 
     /**
@@ -144,7 +113,7 @@ class Style
      */
     public static function getStyles()
     {
-        return self::$_styleElements;
+        return self::$styles;
     }
 
     /**
@@ -154,10 +123,31 @@ class Style
      */
     public static function getStyle($styleName)
     {
-        if (array_key_exists($styleName, self::$_styleElements)) {
-            return self::$_styleElements[$styleName];
+        if (array_key_exists($styleName, self::$styles)) {
+            return self::$styles[$styleName];
         } else {
             return null;
         }
     }
+
+    /**
+     * Set style values
+     *
+     * @param string $styleName
+     * @param array $styleValues
+     * @param mixed $styleObject
+     */
+    private static function setStyleValues($styleName, $styleValues, $styleObject)
+    {
+        if (!array_key_exists($styleName, self::$styles)) {
+            foreach ($styleValues as $key => $value) {
+                if (substr($key, 0, 1) != '_') {
+                    $key = '_' . $key;
+                }
+                $styleObject->setStyleValue($key, $value);
+            }
+
+            self::$styles[$styleName] = $styleObject;
+        }
+    }
 }
diff --git a/src/PhpWord/TOC.php b/src/PhpWord/TOC.php
index bd1c3f38..0dc7c874 100644
--- a/src/PhpWord/TOC.php
+++ b/src/PhpWord/TOC.php
@@ -22,35 +22,35 @@ class TOC
      *
      * @var array
      */
-    private static $_titles = array();
+    private static $titles = array();
 
     /**
      * TOC style
      *
      * @var TOCStyle
      */
-    private static $_styleTOC;
+    private static $TOCStyle;
 
     /**
      * Font style
      *
      * @var Font|array|string
      */
-    private static $_styleFont;
+    private static $fontStyle;
 
     /**
      * Title anchor
      *
      * @var int
      */
-    private static $_anchor = 252634154;
+    private static $anchor = 252634154;
 
     /**
      * Title bookmark
      *
      * @var int
      */
-    private static $_bookmarkId = 0;
+    private static $bookmarkId = 0;
 
 
     /**
@@ -61,28 +61,28 @@ class TOC
      */
     public function __construct($styleFont = null, $styleTOC = null)
     {
-        self::$_styleTOC = new TOCStyle();
+        self::$TOCStyle = new TOCStyle();
 
         if (!is_null($styleTOC) && is_array($styleTOC)) {
             foreach ($styleTOC as $key => $value) {
                 if (substr($key, 0, 1) != '_') {
                     $key = '_' . $key;
                 }
-                self::$_styleTOC->setStyleValue($key, $value);
+                self::$TOCStyle->setStyleValue($key, $value);
             }
         }
 
         if (!is_null($styleFont)) {
             if (is_array($styleFont)) {
-                self::$_styleFont = new Font();
+                self::$fontStyle = new Font();
                 foreach ($styleFont as $key => $value) {
                     if (substr($key, 0, 1) != '_') {
                         $key = '_' . $key;
                     }
-                    self::$_styleFont->setStyleValue($key, $value);
+                    self::$fontStyle->setStyleValue($key, $value);
                 }
             } else {
-                self::$_styleFont = $styleFont;
+                self::$fontStyle = $styleFont;
             }
         }
     }
@@ -96,8 +96,8 @@ class TOC
      */
     public static function addTitle($text, $depth = 0)
     {
-        $anchor = '_Toc' . ++self::$_anchor;
-        $bookmarkId = self::$_bookmarkId++;
+        $anchor = '_Toc' . ++self::$anchor;
+        $bookmarkId = self::$bookmarkId++;
 
         $title = array();
         $title['text'] = $text;
@@ -105,7 +105,7 @@ class TOC
         $title['anchor'] = $anchor;
         $title['bookmarkId'] = $bookmarkId;
 
-        self::$_titles[] = $title;
+        self::$titles[] = $title;
 
         return array($anchor, $bookmarkId);
     }
@@ -117,7 +117,15 @@ class TOC
      */
     public static function getTitles()
     {
-        return self::$_titles;
+        return self::$titles;
+    }
+
+    /**
+     * Reset footnotes
+     */
+    public static function reset()
+    {
+        self::$titles = array();
     }
 
     /**
@@ -127,7 +135,7 @@ class TOC
      */
     public static function getStyleTOC()
     {
-        return self::$_styleTOC;
+        return self::$TOCStyle;
     }
 
     /**
@@ -137,6 +145,6 @@ class TOC
      */
     public static function getStyleFont()
     {
-        return self::$_styleFont;
+        return self::$fontStyle;
     }
 }
diff --git a/tests/PhpWord/Tests/Container/HeaderTest.php b/tests/PhpWord/Tests/Container/HeaderTest.php
index d7425bdc..9d13d57c 100644
--- a/tests/PhpWord/Tests/Container/HeaderTest.php
+++ b/tests/PhpWord/Tests/Container/HeaderTest.php
@@ -220,4 +220,15 @@ class HeaderTest extends \PHPUnit_Framework_TestCase
 
         $this->assertEquals($oHeader->getType(), Header::EVEN);
     }
+
+    /**
+     * Add footnote exception
+     *
+     * @expectedException BadMethodCallException
+     */
+    public function testAddFootnoteException()
+    {
+        $header = new Header(1);
+        $header->addFootnote();
+    }
 }
diff --git a/tests/PhpWord/Tests/FootnoteTest.php b/tests/PhpWord/Tests/FootnoteTest.php
index 955d02e5..47aea9a3 100644
--- a/tests/PhpWord/Tests/FootnoteTest.php
+++ b/tests/PhpWord/Tests/FootnoteTest.php
@@ -31,5 +31,8 @@ class FootnoteTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(1, $rIdLink);
         $this->assertEquals(1, count(Footnote::getFootnoteElements()));
         $this->assertEquals(1, count(Footnote::getFootnoteLinkElements()));
+
+        Footnote::reset();
+        $this->assertEquals(0, count(Footnote::getFootnoteElements()));
     }
 }
diff --git a/tests/PhpWord/Tests/MediaTest.php b/tests/PhpWord/Tests/MediaTest.php
index b1a49059..3df52e4a 100644
--- a/tests/PhpWord/Tests/MediaTest.php
+++ b/tests/PhpWord/Tests/MediaTest.php
@@ -83,7 +83,7 @@ class MediaTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
-     * Add footer media element
+     * Add footer media element and reset media
      */
     public function testAddFooterMediaElement()
     {
@@ -94,5 +94,8 @@ class MediaTest extends \PHPUnit_Framework_TestCase
         Media::addMediaElement('footer1', 'image', $remote, new Image($remote));
 
         $this->assertEquals(2, Media::countMediaElements('footer1'));
+
+        Media::reset();
+        $this->assertEquals(0, Media::countMediaElements('footer1'));
     }
 }
diff --git a/tests/PhpWord/Tests/StyleTest.php b/tests/PhpWord/Tests/StyleTest.php
index 6381cbc9..b323ece4 100644
--- a/tests/PhpWord/Tests/StyleTest.php
+++ b/tests/PhpWord/Tests/StyleTest.php
@@ -43,6 +43,10 @@ class StyleTest extends \PHPUnit_Framework_TestCase
             $this->assertInstanceOf("PhpOffice\\PhpWord\\Style\\{$style}", Style::getStyle($name));
         }
         $this->assertNull(Style::getStyle('Unknown'));
+
+        Style::reset();
+        $this->assertEquals(0, count(Style::getStyles()));
+
     }
 
     /**
diff --git a/tests/PhpWord/Tests/TOCTest.php b/tests/PhpWord/Tests/TOCTest.php
index 100206a4..0a060eb8 100644
--- a/tests/PhpWord/Tests/TOCTest.php
+++ b/tests/PhpWord/Tests/TOCTest.php
@@ -78,5 +78,9 @@ class TOCTest extends \PHPUnit_Framework_TestCase
             $this->assertEquals($depth, $savedTitles[$i]['depth']);
             $i++;
         }
+
+        TOC::reset();
+        $this->assertEquals(0, count(TOC::getTitles()));
+
     }
 }