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
Lauda Sion optional in the post-Vatican II Ordinary form. As with St. Thomas' other three Eucharistic hymns, the last few stanzas of the "Lauda Sion" are often used alone, in this case, to form the "Ecce panis Angelorum". Another translation is used in the 1981 Lectionary approved for Australia and New Zealand (Volume 1, pages 601-603). It is by James Ambrose Dominic Aylward OP (1813-1872) and was published in Annus Sanctus in 1884, pages 194-196. Lauda Sion "Lauda Sion Salvatorem" is a sequence prescribed for the Roman Catholic Mass for the feast of Corpus Christi. It was written by St. Thomas Aquinas