To be privately owned
Klein-Engershausen Manor (Preußisch Oldendorf)

Herrenhaus Klein-Engershausen, also known as Gut Klein-Engershausen, is a historic manor house and estate in Preußisch Oldendorf, North Rhine-Westphalia.
History+
The origins of Gut Klein-Engershausen likely date back to the 14th century, probably developing from a farm and thus predating the nearby Gut Groß-Engershausen. In 1753, the manor house was rebuilt as a single-story half-timbered structure with a hipped roof. The early ownership is not fully clear, but Johann von Sloer is mentioned as a possible owner of both Engershausen estates around 1491. Later owners included the von Hasfurts family and the Lords and Barons von Venningen.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Andreas Schwarzkopf / CC BY-SA 3.0 via Wikimedia Commons
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: 52.3112, 8.5000