To be privately owned
Byink Castle

In Ascheberg-Davensberg, Haus Byink is a historic castle with origins as a Westphalian farmhouse in the Renaissance style. The complex was once a two-island moated castle.
History+
The origins of Haus Byink date back to around 1400, when a predecessor building was already owned by the Lords of Ascheberg. In 1558, Heinrich von Ascheberg constructed the current building in the Renaissance style. Just three years later, in 1561, a two-story gatehouse with two semicircular tower-like projections was added. This structure is characterized by one-and-a-half-meter-thick walls made of brick mosaic. Through a legacy, the house passed into the possession of Christoph Engelbert von Beverförde-Werries in 1698.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=563
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: 51.8123, 7.5930