Book excerpt: 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. It culminated in 1244 at the mountain fortress of Montsegur with the massacre of the Cathars, or "pure ones"--A faith more ancient than Catholicism. At stake was not only the growth of this rival religion right in the heart of the Catholic Church's territory, but also the very survival of the Languedoc itself as an autonomous and independent region of France.