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 Urban IV lands in northern Italy, nor in the Papal States. Charles promised to restore the annual "census" or feudal tribute due the Pope as overlord, some 10,000 ounces of gold being agreed upon, while the Pope would work to block Conradin from election as King of the Germans. Before the arrival in Italy of his candidate Charles, Urban IV died at Perugia on 2 October 1264. His successor was Pope Clement IV, who immediately took up the papal side of the arrangement. Tannhäuser, a prominent German Minnesänger and poet, was a contemporary of Pope Urban IV—the pope died in 1264, and