Wachenheim Castle in Rhineland-Palatinate by EuroTourData
Wachenheim Castle is the restored ruins of the spur castle, built around 1250 as the fortified residence for the Conrad of Hohenstaufen, Count Palatine of the Rhine. During the war of 1375 between the owner of the castle and the cities of Mainz, Worms, and Speyer, the castle was badly damaged but was restored. In 1470, Wachtenburg was destroyed by artillery fire during the capture by Frederick I, Elector Palatine, and later only partially restored. During the Nine Years' War, French troops blew up the keep in 1689. Since 1984, the castle has been owned by the town of Wachenheim.
The article Wachtenburg of German Wikipedia.