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
Clermont-Ferrand Jerusalem from Muslim domination: Pope Urban II preached the crusade there in 1095, at the Second Council of Clermont. In 1120, following repeated crises between the counts of Auvergne and the bishops of Clermont and in order to counteract the clergy’s power, the counts founded the rival city of Montferrand on a mound next to the fortifications of Clermont, on the model of the new cities of the Midi springing up in the 12th and 13th centuries. Until the early modern period, the two remained separate cities: Clermont, an episcopal city; Montferrand, a comital one. Clermont became a royal city