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
Guilliaume de Montfort Guilliaume de Montfort Guilliaume de Montfort () (died 27 August 1101) was a French bishop, most notably the Bishop of Paris from 1095 to 1101. Montfort's date of birth is not known, but it was some time before the death of his father, Simon I de Montfort in 1087. He was Bishop of Yves some time before becoming the Bishop of Paris. In 1095, Pope Urban II held the Council of Clermont at Clermont-Ferrand, France. It excommunicated Philip I of France and Bertrade de Montfort, William's sister, for adultery. William had been noted as a great supporter of Urban II,