Cathedral of Saint Helena Cathedral of Saint Helena The Cathedral of Saint Helena is the cathedral of the Roman Catholic Diocese of Helena, Montana. Modeled by architect A.O. Von Herbulis after the Votivkirche in Vienna, Austria, the construction began on the Cathedral in 1908, and held its first mass in November 1914. The Cathedral sustained significant damage during the 1935 Helena earthquake, which required extensive renovations. The Cathedral was added to the National Register of Historic Places in 1980. The site for the cathedral was purchased in 1905. A.O. Von Herbulis of Washington, D.C., was commissioned as the architect. Von Herbulis was trained abroad
Geography of Saint Helena this is not the case on St Helena itself. St. Helena exists because of the St. Helena hotspot which began to produce basaltic lava about 145 million years ago when it was near the constructive plate margin of the Mid-Atlantic Ridge. The movement of the African Plate away from the hotspot has left the chain of the St. Helena seamounts, which may connect with the Cameroon Volcanic Line. St. Helena, the most south westerly point on the chain, is close to the plate margin, but the last volcanic eruptions occurred about 7 million years ago. The first investigations of St.