Tags: Clerical Administrative Region, Diocese.
The Diocese of Sion (Latin: Dioecesis Sedunensis French: Évêché de Sion German: Bistum Sitten) is a Roman Catholic ecclesiastical territory in the canton of Valais Switzerland. It is the oldest bishopric in the country and one of the oldest north of the Alps. The history of the Bishops of Sion of the Abbey of St. Maurice of Valais as a whole are inextricably intertwined.
