Frischenberg Castle

Frischenberg is a ruined castle in Sennwald, canton of St. Gallen, Switzerland. It was built in the early 14th century by the lords of Hohensax, probably by Ulrich III von Hohensax some time after 1313. It was destroyed and rebuilt in 1446, and abandoned in 1551. It is located on a rocky ridge at 585 m (1,919 ft) elevation, overlooking the Alpine Rhine Valley. The ruins of the older Hohensax Castle is nearby on the same ridge, at a distance of about 400 m (1,300 ft) The castle was sold to duke Leopold IV of Austria in 1393 along with the Hohensax lordship, but returned to Ulrich Eberhard IV of Hohensax as a fief. In the Appenzell War of 1405, the castle was occupied by Appenzell and became detached from the lordship of Hohensax. It was bought by Ulrich von Hohensax in 1440, but in 1446, the castle was again attacked by Appenzell, in the context of the Old Zürich War, and was destroyed.