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
Pope Paschal II Pope Paschal II Pope Paschal II (; 1050 1055 – 21 January 1118), born Ranierius, was Pope from 13 August 1099 to his death in 1118. A monk of the Cluniac order, he created the Cardinal-Priest of San Clemente by Pope Gregory VII (1073–85) in 1073. He was consecrated as pope in succession to Pope Urban II (1088–99) on 19 August 1099. His reign of almost twenty years was exceptionally long for a pope of the Middle Ages. He was born in Bleda, near Forlì, Romagna. During the long struggle of the papacy with the Holy Roman Emperors over investiture,