Bieberstein Castle (Ruin)

Bieberstein Castle is a castle ruin on a rocky slope above the Wiehl valley near Bieberstein in the Oberbergisch district in North Rhine-Westphalia.

The hilltop castle was built in the 14th century, its first documented mention was in 1342. It was once a mighty rubble stone building with considerable wall thicknesses and received its current still visible form in the late Middle Ages. The castle was inhabited until the 19th century, but was then abandoned, so that it fell into severe disrepair. Today, only wall remains and enclosing walls of the castle are preserved.

During investigations in 1933, a terraced basement was uncovered. The researchers did not find confirmation of the legend of an underground passage that connected Bieberstein with the village of Grünenbach and through which the castle inhabitants were said to have been supplied with fresh food during a siege.