Crusades In 1095, Pope Urban II called for the First Crusade in a sermon at the Council of Clermont. He encouraged military support for the Byzantine Empire and its Emperor, AlexiosI, who needed reinforcements for his conflict with westward migrating Turks colonizing Anatolia. One of Urban's aims was to guarantee pilgrims access to the Eastern Mediterranean holy sites that were under Muslim control but scholars disagree as to whether this was the primary motive for Urban or those who heeded his call. Urban's strategy may have been to unite the Eastern and Western branches of Christendom, which had been divided since
Pope Lucius II Pope of his temporal power. The principal groups involved in this movement were the merchants and artisans, while the urban nobility kept their neutrality. The Senate, which practically took all temporal power from the Pope during the pontificate of Innocent II, had been managed with considerable skill and firmness by Lucius at the beginning of his pontificate, convincing many senators to either leave the Capitoline Hill or to lay down their magisterium. Now, encouraged by Lucius II's defeat, the Senate, led by Giordano Pierleoni, brother of the former Antipope Anacletus II, rebelled against Lucius II, driving out the papal prefects