History of the papacy finally resulted in mutual denunciations and excommunications. Pope Urban II (1088–99) speech at the Council of Clermont in 1095 became the rallying cry of the First Crusade. Unlike the previous millennium, the process for papal selection became somewhat fixed during this period. Pope Nicholas II promulgated "In nomine Domini" in 1059, which limited suffrage in papal elections to the College of Cardinals. The rules and procedures of papal elections evolved during this period, laying the groundwork for the modern papal conclave. The driving force behind these reforms was Cardinal Hildebrand, who later became Gregory VII. The pope is the bishop
Gerard (archbishop of York) archdeacon of Rouen. He served in the royal chancery under successive kings of England, William I and William II. Gerard was appointed Lord Chancellor of England in 1085, and was present at William I's deathbed in 1087. He continued as Chancellor to William Rufus until 1092; what precipitated his loss of office is unclear. He retained the king's trust, for Rufus employed him in 1095 along with William Warelwast on a diplomatic mission to Pope Urban II regarding Archbishop Anselm receiving the pallium, the sign of an archbishop's authority. Rufus offered to recognise Urban as pope rather than the Antipope