Burg Kalsmunt

Burg Kalsmunt stands on a 256-metre basalt cone above Wetzlar in Hesse. The ruin rises about 850 metres southwest of the old town centre on a once open hill now covered with scrub. The difference in height between the castle hill and the Schillerplatz in the town below is ninety metres. The basalt cone is part of a volcanic ridge that once provided a clear view in all directions. The site commands the Wetterau plain and the valley of the Lahn. The ruins are the remains of a former imperial castle built to protect the town and its royal mint. The castle’s origins are uncertain, with theories ranging from a Roman foundation to a Carolingian fortress built by Charlemagne around 785. Emperor Frederick Barbarossa expanded the site in the late 12th century to secure imperial control. The mint on the site struck coins bearing the legend Calsmund under Barbarossa. In 1284 the impostor Tile Kolup was held and questioned here before being burned at the stake. The castle never came under direct attack despite its strategic importance. Visitors reach the ruin by a path that climbs from the town through mixed woodland. The remains include sections of the curtain wall and a massive bergfried whose entrance was lowered in the 19th century. The summit platform offers wide views over Wetzlar and the Lahn valley. Inside the tower base there are traces of the World War II flak position and a small bunker used in 1945. Archaeologists continue to uncover finds that illuminate the castle’s long history.