Roman Catholic Diocese of Helena was formed to serve eastern Montana. The seat of the diocese is in the Cathedral of St. Helena in the state capital of Helena. It was completed in 1914. The bishops of the Diocese of Helena and their years of service: Roman Catholic Diocese of Helena The Diocese of Helena () is the Catholic diocese for western Montana with its cathedral located in Helena, the state capital. The diocese was erected from the year-old Vicarate of Montana on March 7, 1884, while Montana was still a territory. The diocese is a suffragan of the Archdiocese of Portland, which encompasses Oregon,
Jean III de Grailly, captal de Buch in 1372. While attempting to lift the siege of Soubise his force was surprised by a French force led by Owain Lawgoch, a Welsh soldier of fortune in the French service. The Captal and Sir Thomas Percy, seneschal of Poitou, were captured. The Captal spent the remainder of his life as a prisoner at the Temple in Paris because Charles V believed him too dangerous to ransom back to the English. Froissart gives an account of the Captal de Buch's chivalry and courage at the time of the peasant uprising in 1358 called the "Jacquerie" (see link). Jean de Grailly