born 1165?
died June 25, 1218, Toulouse, France
French leader of the Albigensian Crusade .
From 1209 he led a Crusade against the Cathari heretics, and he became governor of the lands he conquered in southern France. The fourth Lateran Council gave him Toulouse (1215), but Raymond VI , count of Toulouse, refused to accept defeat, and Montfort was killed while besieging the city. His eldest son ceded the Montfort lands in southern France to King Louis VIII.