To be privately owned
Liedberg Castle

Liedberg Castle is in Korschenbroich-Liedberg, within the Rhein-Kreis-Neuss district of North Rhine-Westphalia. Originally conceived as a hilltop castle, it now combines historical building fabric with Baroque elements.
History+
The origins of Liedberg Castle stretch far back, with the foundation walls of the current structure likely dating from the 11th century. In the 14th century, the complex emerged as the third fortification after the Römerwacht and the Mühlenturm. The main or central tower, dated to around 1270, once served as a gate tower and keep, with 1.60-meter-thick masonry. From 1279, the castle and lordship of Liedberg were owned by the Archbishops of Cologne. Archbishop Wilhelm von Gennep had further constructions added around 1350. In 1391, the castle was stormed by Engelbert III of the Mark, damaging the castle wall, which was, however, rebuilt just a year later. During the Dutch War in 1673, the castle suffered further damage, and the town of Liedberg was almost completely destroyed.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.zeche.org/
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: 51.1636, 6.5441