Sion, Switzerland Sion, Switzerland Sion (; ; ; ) is a Swiss town, a municipality, and the capital of the canton of Valais and of the district of Sion. it had a population of (known as "Sédunois(e)"). On 17 January 1968, the former municipality of Bramois merged into the municipality of Sion. On 1 January 2013, the former municipality of Salins merged into the municipality of Sion, and on 1 January 2017, Les Agettes did the same. Landmarks in Sion include the Basilique de Valère and Château de Tourbillon. Sion has an airfield for civilian and military use, where it serves as
Trans-European Airport network Trans-European Airport network The Trans-European Airport network is one of a number of the Trans-European Transport Networks (TEN-T) of the European Union. According to Article 13 of the Decision No 1692/96/EC of the European Parliament and of the Council of 23 July 1996 on Community guidelines for the development of the trans-European transport network, the Trans-European Airport network comprises airports situated within the territory of the Community which are open to commercial air traffic. Similarly to the seaports included in the Trans-European Transport network, the airports must correspond to one of the following three categories of connecting points: A. International