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
Priory of Sion a public declaration claiming to be the current Grand Master of the Priory of Sion. (IT) LE PRIEURÉ DE SION UNA SCIENZA SOCIALE, book of Domizio CIPRIANI, edited by bastogi libri, 2018, . Priory of Sion The Prieuré de Sion (), translated as Priory of Sion, is a fringe fraternal organisation, founded and dissolved in France in 1956 by Pierre Plantard as part of a hoax. In the 1960s, Plantard created a fictitious history for that organization, describing it as a secret society founded by Godfrey of Bouillon on Mount Zion in the Kingdom of Jerusalem in 1099, conflating it