Christianity in the 11th century when the Seljuk Turks closed Christian pilgrimages and assailed the Byzantines, defeating them at the Battle of Manzikert. Emperor Alexius I asked for aid from Pope Urban II for help against Islamic aggression. Urban II called upon the knights of Christendom in a speech made at the Council of Clermont on 27 November 1095, combining the idea of pilgrimage to the Holy Land with that of waging a holy war against infidels. The First Crusade captured Antioch in 1099 and then Jerusalem. A traditional numbering scheme for the crusades totals nine during the 11th to 13th centuries. Elements of the
Pope Urban IV lands in northern Italy, nor in the Papal States. Charles promised to restore the annual "census" or feudal tribute due the Pope as overlord, some 10,000 ounces of gold being agreed upon, while the Pope would work to block Conradin from election as King of the Germans. Before the arrival in Italy of his candidate Charles, Urban IV died at Perugia on 2 October 1264. His successor was Pope Clement IV, who immediately took up the papal side of the arrangement. Tannhäuser, a prominent German Minnesänger and poet, was a contemporary of Pope Urban IV—the pope died in 1264, and