League of God's House
The nearby Burg Spliatsch was built around the beginning of the 13th Century by the Marmels family. In 1663 the Capuchin friars built the baroque church of S. Catregna (Katharina) on the ruined foundations of the medieval church of St. Bartholomäus. Today this church, together with the villages of Mulegns and Marmorera form a parish. Until 1850 Sur was part of the municipality of Oberhalbstein in the League of God's House. Before the construction of the Rhaetian Railway Sur was a cluster of farm houses and a major side industry was providing guides to travellers.