The Song of the Albigensian Crusade is an Old Occitan epic poem narrating events of the Albigensian Crusade from March 1208 to June 1219. Modelled on the Old French chanson de geste, it was composed in two distinct parts: William of Tudela wrote the first towards 1213, and an anonymous continuator finished the account. However, recent studies have proposed the troubadour Gui de Cavalhon as the author of the second part. It is one of three major contemporary narratives of the Albigensian Crusade, the Historia Albigensis of Pierre des Vaux-de-Cernay and the Chronica of William of Puylaurens being the others. There is a single surviving manuscript of the whole Song (fr. 25425 in the Bibliothèque nationale), written in or around Toulouse about 1275. Source: Wikipedia (en)