Zavelstein Castle

The ruins of Zavelstein Castle, a former hill castle, stand at 560 m above sea level on a hill spur above the Teinach valley on the southeastern edge of the municipality of Bad Teinach-Zavelstein in the county of Calw in the south German state of Baden-Württemberg.
Archaeological investigations revealed that the castle must have been built around the middle of the 13th century. The first written record of the castle dates to 1303, from which it is clear that a Herr Richelin, a knight in Zavelstein, had lived in the castle, probably from 1280. By 1311 Zavelstein surfaces in the documents as a Württemberg castle and was thus owned by the counts of Württemberg. Together with their lordship of the castles of Neuenbürg, Calw, Fautsberg, Wildberg and Nagold, they were able to maintain their influence over the newly acquired territories in the northeastern Black Forest.

Wikipedia