The Song of Roland (French: La Chanson de Roland) is the oldest surviving major work of French literature. It exists in various different manuscript versions which testify to its enormous and enduring popularity in the 12th to 14th centuries. The oldest of these is the Oxford manuscript which contains a text of some 4004 lines (the number varies slightly in different modern editions) and is usually dated to the middle of the twelfth century (between 1140 and 1170). The epic poem is the first and most outstanding example of the chanson de geste, a literary form that flourished between the eleventh and fifteenth centuries and celebrated the legendary deeds of a hero. The Song of Roland is an epic poem, originally sung in Old French. It tells the story of the Battle of Roncevaux Pass in 778.