Grimmenstein castle

The ruins of Grimmenstein Castle, located above the hamlet of Romenschwanden in St. Margrethen, sit picturesquely in the woods on a striking rocky ridge between two ravines, offering a fine view of the Rhine Valley and Lake Constance.

For many people in the region, Grimmenstein Castle evokes memories of childhood and youth and is highly regarded as a nearby destination for day trips. The ruins, which are accessible only on foot, are open to the public year-round. Right next to the site is a public barbecue area (wood not provided). Amid ancient walls, forest paths, and a fire pit, a unique atmosphere emerges that transports young and old alike back to the time of knights and castle dwellers.

The ruins are accessible only on foot—for example, from St. Margrethen or Walzenhausen. 

History
Around 1250, Konrad von Falkenstein built Grimmenstein Castle. Afterward, he and his descendants took the new name “von Grimmenstein.” Until its destruction in 1416, Grimmenstein was involved in military conflicts at least three times. Following a raid on a ship on Lake Constance, the last owner, Georg II von Enne, was forced to have the castle destroyed in exchange for his life. The corner of the tower, which still stands today and is visible from afar, was left standing as a memorial. 

Between 1936 and 1938, the site was excavated and secured. The second major restoration, accompanied by architectural-archaeological documentation, took place in 2023–2024.

The reconstructed history of the castle can be viewed on the website of the St. Gallen Cantonal Archaeology Office: https://www.sg.ch/kultur/archaeologie/burgruine-grimmenstein.html

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Burg Grimmenstein
Burg Grimmenstein
Burg Grimmenstein
Burg Grimmenstein

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Burghalde 44
9430 Sankt Margrethen
Switzerland

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