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,
Captal de Buch title the word "captal" was used only by the seigneurs of Trene, Puychagut, Épernon, and Buch. When Pierre, the seigneur of Grailly ("ca" 1285 – 1356) married Asalide (the "captaline de Buch"), the heiress of Pierre-Amanieu de Bordeaux, captal de Buch, in 1307, the title passed into the Grailly family, a line of fighting seigneurs with origins in Savoy. The title is best known in connexion with the famous soldier, Jean III de Grailly, captal de Buch (1343–1377), the "captal de Buch" par excellence, immortalized by Jean Froissart as the confidant of the Black Prince and the champion of the