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
Saint-Flour, Cantal a fortress in the ruins of the monastery, but, seized with remorse, donated it once more to Odilo of Cluny. Urban II, following the Council of Clermont (1095) consecrated the new abbey church, which received a triple dedication reflecting local tradition and present affiliations: Saint-Sauveur, Saint Pierre and Saint Flour. The diocese of Saint-Flour was established in August 1317 by the Avignon pope, John XXII. During the Revolution the commune took several successive names, de-Christianized as Fort-Cantal, "Fort-Libre" then Mont-Flour before retrieving its ancient historic designation in "an II" (1793). The territory of the commune was never changed. Briefly, between