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
Ion Theodorescu-Sion composition into solid shapes, for which the model was Cézanne. Co-opted as a teacher at the National School of Fine Arts, Theodorescu-Sion was also one of the founding members of the Artists' Society, a leading Romanian professional association. As Romania entered World War I in 1916, Ion Theodorescu-Sion was forced to interrupt his work on the Constanța murals. Once drafted into the Romanian Land Forces, he returned to official and academic art: he was employed by Chief of Staff Dumitru Iliescu to depict the Romanian Armed Forces in action. Sion witnessed (and painted) the subsequent storming of the Romanian front