Albigenses were a sect of Cathars in southern France whom Pope Innocent III called dualist heretics. Since not converting to Catholicism they were ravaged by the savaged crusade led by Simon de Montefort until 1218; and then in 1233 their torment was continued by the Dominican Inquisition which succeeded in eliminating them. Their name was probably derived from the town of Albi, which some maintain was their center, but the sect was probably implanted throughout the whole area surrounding Toulouse. Some speculate a possible remote ancestry to the teaching of Mani (See Manichaenism) A.G.H.
Bowker, John, The Oxford Dictionary of World Religions, New York, Oxford University Press, 1997, p. 41 “Cathars” Wikipedia, the free Encyclopedia, <http://en.wikipedia.org/wiki/Cathar>