Casseneuil is a commune in the Lot-et-Garonne department in south-western France.. Sieges of 1209 and 1214 during the Albigensian Crusade. In July 1214 Robert de Courçon, the papal legate, awarded the territories of Rodez, Albigeois, Quercy and Agenais in perpetuity to Simon IV de Montfort, who promptly set out with an army from …