To be privately owned
CastleOverath
Großbernsau Castle (Ruin) (Overath)

The Großbernsau Ruin, also known as Neu-Bernsau, is situated on an island in the Agger floodplains in the northern part of the city of Overath. Surrounded by a small moat, it was a motte that was inhabited until the 18th century.
History+
The origins of Großbernsau Castle date back to the 14th century, when it was built as a motte. It was one of eight knightly seats in Overath. The Bernsau family died out in 1532 with the death of Wilhelm von Bernsau.
Source: Wikipedia · Licence: CC BY-SA 4.0
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 50.9431, 7.3010