Burg Ohrsberg, castle ruin in Eberbach, Germany

Burg Ohrsberg is a castle ruin sitting on a hilltop in Eberbach, probably built in the late 12th or early 13th century. The remains show a double trench system around the hill, with wall foundations and reconstructed sections from the 20th century that give a sense of the original fortification's structure.

Burg Ohrsberg appears in no surviving document; only a 1404 charter mentioning "sloße Eberbach, burg und stad" may refer to it. Klaus Kilian's 1963 excavation dated its construction to shortly before 1230, with destruction by fire before 1260, continued use into the later 13th century, and a final provisional refortification around 1500.

The name Ohrsberg is not explained in the sources; the hill was long left out of local historiography because the castle appears in no surviving document. In 1883 the site was thought to be a fenced Germanic cult place, and the local beautification society built a stone base and paths for a pavilion there. The 19th-century pavilion base and the 1970s viewing tower now stand on the plateau.

The site is reached by walking paths and offers wide views of the surrounding landscape and valley from above. Visitors should wear sturdy shoes, as the ground is uneven and the paths can be steep.

The double trench system around the hill is rarely seen in the nearby area and suggests a carefully planned defensive design. Archaeologists continue to study this double structure to better understand whether it was a frontier fortress or simply an outpost for a nearby larger castle.