From 1211 to 1213 he preached the Albigensian Crusade, touring France and Germany with William, the archdeacon of Paris, and recruiting many Crusaders.
Desde 1211 a 1213 predicou a Cruzada Albigense, visitando Francia e Alemaña con Guillerme, o arcediago de París, e recrutando moitos cruzados.