Badenweiler Castle of Baden-Württemberg by EuroTourData
Badenweiler Castle was built around 1122 as the hill castle to protect silver mines, located in the central part of the town Badenweiler. Info based on the article Burg Baden of German Wikipedia.

Image copyright info
© Creative Commons: Burg Baden 5, author Zieglhar. License: CC BY-SA 4.0. Cropped from original.
Badenweiler Castle history
Excavations at the castle and on the castle hill show that the Romans built a fort to protect the Aqua Villa (modern Badenweiler). Later, the Alamanni built a hilltop castle to secure their territory. Subsequently, this castle was captured by the Franks. Around 1122 the House of Zähringen built or rebuilt the castle to protect their silver mines. In the 14th century, the outer fortifications were built due to constant disputes with neighboring lords. During the Franco-Dutch War, on November 20, 1677, the French troops units moved to Badenweiler and demanded the inclusion of a French garrison in the castle. This was approved by officials under certain conditions. However, the French garrison did not fulfill the agreed conditions, and on April 6, 1678, the castle was captured by French troops, who set fire to and partially blew up the castle. After that, the castle was not restored.
Description of Badenweiler Castle
Currently, the castle is a restored ruin and is available for sightseeing. In the northeastern part of the courtyard, there are the ruins of a palace with three parts, and it is clear that the building was multi-story and had several rooms, the shape of the windows was preserved. The belfry can be climbed as an observation deck.
Badenweiler Castle is under the state ownership of the Staatliche Schlösser und Gärten Baden-Württemberg.