At the end of the Albigensian Crusade the Franks forced Joan st Gilles to marry Prince Alphonse (of Poitiers). The marriage was not blessed with any children, so the succession of Toulouse should have reverted to the Trencavel family and ultimately to Ximene. Instead the Franks claimed the estates of Toulouse as a part of the “royal domain” Three generations of the trencavel family lived in Sicily under the patronage of the Holy Roman Emperor , Frederich II