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
Sion-sur-l'Océan 150 years later, it is still his great-grandchildren who take certain businesses from the town (Hotel of Tourists, grocery store, restaurant le carré, hairdressing Baranger). Sion-sur-l'Océan Sion-sur-l'Océan is a village and seaside resort in the Vendée department in western France. Sion is on the coast of the Atlantic Ocean in front of the island of Yeu (Île d'Yeu). Sion-sur-l'Océan is part of the commune of Saint-Hilaire-de-Riez. Sion is located on the coast between ocean, beach, dune, forest and rocky ledge. The resort has three beaches (Bussoleries, the small beach and the grand beach) and a few cracks visible at low