To be privately owned
CastleOber-Olm
Ober-Olm Castle

The Electoral Palace in Koblenz+
The Electoral Palace in Koblenz, located on the banks of the Rhine, is one of the most important examples of early French Neoclassicism in southwestern Germany. It was built between 1777 and 1793 as a residence for the last Elector of Trier, Clemens Wenceslaus of Saxony.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=899&sid=246e8c9fdbfa80ccf9a3497b2adfd6ed
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: 49.9511, 8.1893