To be privately owned
Großbüllesheim Castle

Burg Großbüllesheim is a former moated castle in Großbüllesheim, a district of Euskirchen in North Rhine-Westphalia. Only a few remnants remain today, including the gatehouse of the outer bailey.
History+
The moated castle Großbüllesheim was first mentioned in 1402, when it was granted as a fief by the Duke of Jülich to Reymer Spies von Büllesheim. It remained a Jülich fief until the death of the last Duke, Ludwig von Brempt, in 1802. Subsequently, the castle lost its status as a noble residence and began to decay.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=568
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: 50.6806, 6.8189