To be privately owned
Quarnbek Manor

Quarnbek Manor is located in the municipality of Quarnbek in Schleswig-Holstein. Its history dates back to the Middle Ages.
History+
The first documented mention of the Quarnbek estate dates back to 1282. The first known owner was Knight Schak Rantzau. In the 16th century, a moated castle was built on this site, which was depicted around 1587 on the Rantzau Panel commissioned by Heinrich Rantzau. In 1671, Hans Henrich von Kielmansegg had a gatehouse built, offering a direct line of sight to the moated castle.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Gut_Quarnbek_Torhaus.JPG
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: 54.3295, 9.9909