Massacre at Montségur: A History of the Albigensian Crusade

In 1208 Pope Innocent III called for a Crusade-this time against a country of fellow Christians. The new enemy: Raymond VI, Count of Toulouse, one of the greatest princes in Christendom, premier baron of all the territories in southern France where the langue d'oc was spoken. Thus began the Albigensian Crusade, named after the town of Albi.