Roman Catholic Archdiocese of Saint Boniface Tags: Clerical Administrative Region, Diocese.The Roman Catholic Archdiocese of Saint-Boniface (Latin: Archidioecesis Sancti Bonifacii) is a Roman Catholic archdiocese that includes part of the Province of Manitoba. It is currently led by Archbishop Albert LeGatt. point Established 1871 jurisdiction Diocese province Manitoba latitude 49.8895 longitude -97.1238 Learn more... Loading...