To be privately owned
ManorThumby-Bienebek
Bienebek Manor

History of the Manor House+
The ensemble of the manor house and its associated farm buildings, located on the Schlei, is a protected monument. The manor house was built in 1840-41 and is today the seat of the Duchess of Schleswig-Holstein-Sonderburg-Glücksburg. Previous owners included the Lords of Wisch, von Thienen, and von Qualen.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Thumby_Gut_Bienebek_5398.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: 54.6032, 9.8879