To be privately owned
Ortenstein Castle (Tumegl/Tomils)

Ortenstein Castle is on a plateau in Tumegl/Tomils in the canton of Graubünden. Its name, derived from the Old High German word for “outermost point,” describes its location on the edge of a steep slope descending to the Hinterrhein. Despite renovations, the medieval origins of the complex are still discernible.
History+
The origins of Ortenstein Castle likely date back to the second quarter of the 13th century, when the central, seven-story keep was erected on episcopal land. Whether the Bishop of Chur or the Barons of Vaz, who served as episcopal feudal lords, initiated the construction remains uncertain. The castle was first documented in 1309 and 1312, when Donat von Vaz issued documents there. After his death around 1338, Ortenstein passed to the Counts of Werdenberg-Sargans through marriage. In 1451, the castle was destroyed in the Schams Feud but was permitted to be rebuilt in 1452, leading to alterations.
Source: Wikipedia · Licence: CC BY-SA 4.0
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 46.7596, 9.4352