St. Ignatius Mission  The St. Ignatius Mission is a landmark Roman Catholic mission founded at its present location, St. Ignatius, Montana, in 1854 by Father Pierre-Jean De Smet and Father Adrian Hoecken. The current mission church was built between 1891 and 1893, and listed on the U.S. National Register of Historic Places in 1973. The mission church serves the St. Ignatius parish within the Missoula Deanery of the Roman Catholic Diocese of Helena. The mission church is a simplified, vernacular example of Gothic revival architecture constructed of bricks made from native clay. The most exceptional feature of the interior are the 58 murals painted by Brother Joseph Carignano, an untrained artist who worked as a cook in the mission. The church is in plan and its belfry is nearly high.