Roman Catholic Diocese of Sion Roman Catholic Diocese of Sion The Diocese of Sion (, , ) 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. The see was established at Octodurum, now called Martigny, the capital of the Roman province of Alpes Poeninae. The first authentically historical bishop was Saint Theodore/Theodolus (died in 391), who was present at the Council of Aquileia in
Dominican College Sion Hill and German. Sion Hill also has clubs such as St. Vincent Paul, Alive and an Art Club. Dominican College Sion Hill Dominican College Sion Hill is one of the oldest girls' secondary schools in Ireland. It was founded in 1836 in Blackrock, County Dublin in Ireland. Its approach to education is based on the Dominican ideal of developing the whole person. "Dominican College Sion Hill aims to help each student achieve her full potential academically, spiritually, emotionally and socially in a happy environment." Sion Hill was founded by the Dominican sisters in 1836 in a suburban villa called Sion Hill