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,
Sarcophagi of Helena and Constantina museum. The decoration is a semi-pagan depictions of cupids in Dionysic harvesting of grapes to make wine; it has been interpreted as an early Christian reference to the eucharist. Sarcophagi of Helena and Constantina The Sarcophagi of Helena and Constantina are two fourth century porphyry sarcophagi in Rome. The Sarcophagus of Helena is the red porphyry coffin in which Saint Helena, the mother of emperor Constantine the Great, was buried (died 329). The coffin, deprived of it contents for centuries, was removed from the Mausoleum of Helena at Tor Pignatarra, just outside the walled city of Rome, and ultimately moved