To be privately owned
Bassenheimer Palace

The Bassenheimer Palais is a historic residence located in Schmitten-Oberreifenberg in the Hochtaunus region of Hesse, Germany. This building, once owned by the Counts Waldbott von Bassenheim, is particularly known for its recently rediscovered frescoes.
History+
The current Bassenheimer Palais was constructed between 1768 and 1770. It was built on the site of a former castle and served as a representative building for the Counts Waldbott von Bassenheim. The architect Johann Friedrich Sckell was responsible for its construction.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Joachim Schneeleopard
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: 50.2461, 8.4298