Sion is a Swiss town, a municipality, and the capital of the canton of Valais and of the district of Sion. As of December 2020 it had a population of 34,978. 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 the Château de Tourbillon.