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, Mumbai of the islands of Bombay by force, naming it Sião. The Portuguese gave the Jesuit priests the sole ownership of some of these islands. The Jesuits then built a chapel on the hill near the present-day railway station and named it after Mount Zion (Sion) in Jerusalem. It's in South Mumbai. Sion shares its name with a railway station on the Mumbai suburban railway on the Central Railway line. Sion also has a bus station. It is in the central line. Sion is also a home to many educational institutes, namely: Sion, Mumbai Sion is a neighbourhood of Mumbai. The