Pope military aid from Pope Urban II in the ongoing Byzantine–Seljuq wars. Urban, at the council of Clermont, called the First Crusade to assist the Byzantine Empire to regain the old Christian territories, especially Jerusalem. With the East–West Schism, the Eastern Orthodox Church and the Catholic Church split definitively in 1054. This fracture was caused more by political events than by slight divergences of creed. Popes had galled the Byzantine emperors by siding with the king of the Franks, crowning a rival Roman emperor, appropriating the Exarchate of Ravenna, and driving into Greek Italy. In the Middle Ages, popes struggled with
Simon II of Clermont-Nesle Simon II of Clermont-Nesle Simon II of Clermont-Nesle (born after 1250 – died 22 December 1312 or c. February 1313), Peer of France and bishop of Noyon (1297–1301) and Bishop-count of Beauvais (1301–c. 1312). Simon was one of few bishops that supported King Philip IV "the fair" of France against Pope Boniface VIII (c. 1235–1303), to strengthen the monarchy and make the Church support the state's finances in the time of war, while the Pope demanded the privilege of exemption from tax, in spite of extreme wealth, and proclaimed that the Pope is above every king in authority, but the