Roman Catholic Diocese of Helena 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, Idaho, and Montana. Before becoming a diocese, this was the Vicariate of Montana (covering the whole territory and then state of Montana). For its first twenty years, the diocese served all of Montana. In 1904 the new Diocese of Great Falls-Billings
Jean III de Grailly, captal de Buch to the French side and was made lord of Nemours by Charles V of France. However, he soon re-established his loyalty to the English, and in 1367 he went to Spain with the Black Prince, fighting at the Battle of Nájera. Here he again faced Bertrand du Guesclin, but this time it was du Guesclin who was captured, and the Captal was put in charge of the prisoner. He was rewarded for his service by being made the Constable of Aquitaine in 1371. Again fighting for the English, he commanded an English relief force when the French attacked La Rochelle