To be privately owned
Bockum Manor (Bockum)

Bockum Manor House, a historic estate, is in the landscape of the Hochsauerlandkreis in North Rhine-Westphalia. It has a long history as a former knight's estate and its substance has been preserved to the present day.
History+
The first documented mention of the Bockum estate dates back to 1398, when it was owned by the Bockum family. Later, it changed hands through an exchange with the Weslarn knight's estate to the Wesseler family. A subsequent owner adopted the name von Bockum-Dolffs. Further owners included the von Kleinsorgen and von Papen families, before it belonged to the von Schade family until 1841. After the childless death of Baron Joseph von Schade, he bequeathed the property to his niece, Theresia von Schade. She married Baron Johann von Devivere in 1841, who later became district administrator of Meschede. Today, the estate is owned by the Dameris family.
Source: Wikipedia · Licence: CC BY-SA 4.0
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: 51.3592, 8.1833