To be privately owned
CastleKraichtal-Menzingen
Schwanenburg Castle

Schloss Schwanenburg: A Jewel of Renaissance Architecture+
Schloss Schwanenburg, the second Menzingen manor, was built in 1569 on the walls of an old castle.
History of the Castle+
From Medieval Fortress to Renaissance Palace
The history of Schloss Schwanenburg dates back to the Middle Ages.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=1785
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: 49.1415, 8.7730