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,
Helena (wife of Inge the Elder) case have been "Mö Sigtornsdotter". If so Mö-Maer and Helena were probably separate queens, but the equation has been criticized as lacking corroborating evidence. It is also sometimes suggested that Helena was of Greek or Russian origin, but this is unconfirmed and unlikely. Queen Helena or Elin has long been confused in history with Saint Helena of Skövde (d. c. 1135), who lived in Sweden during the same period. This is a misconception which has no support from historians now. Helena (wife of Inge the Elder) Queen Helena or Elin, possibly also known as Maer, Mär or Mö (Old Norse