To be privately owned
Ahrburg Castle

Ahrburg, a former moated castle, is situated on the eastern edge of Golzheim in the municipality of Merzenich.
History+
The earliest known owners of Ahrburg were members of the Luschane family. In 1413, the castle, then known as Luschenicher Hof, was mentioned in a document signed by Arnold Luschane von Golzheim. In 1571, the estate passed to the brothers Alexander, Bertram, and Otto von Ahr, a family originally from Antweiler. Since 1581, the castle has been called Ahrburg.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=570
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: 50.8392, 6.5850