Baldwin I of Jerusalem fought for their brother, Godfrey of Bouillon, against Albert III, Count of Namur and Theoderic, Bishop of Verdun at Stenay in 1086. The childless Godfrey, who became duke of Lower Lotharingia in 1087, mentioned Baldwin in most of his charters of grant, indicating that Baldwin was regarded as his heir. Baldwin regularly visited the fortress of his wife's family at Conches-en-Ouche. Pope Urban II proclaimed the First Crusade at the Council of Clermont on 27November 1095. Godfrey of Bouillon decided to join the military campaign and sold or mortgaged his inherited domains to raise funds. One of his domains, the
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