To be privately owned
Steinhaus Castle

Steinhaus Castle was first documented in 1257. It is a three-winged building, grouped around an inner courtyard.
History+
The first mention of Steinhaus Castle in 1257 names Alber von Polheim as its owner. For four centuries, the estate remained in the possession of the Polheim family. Due to their Protestant faith and refusal to change it, they were forced to sell the castle in 1629. It then passed into the hands of the Catholic Imperial Count Weikart Katzianer von Katzenstein. In 1693, Count Johann Weikhart Katzianer sold the castle to his son-in-law Jakob Friedrich von Eyselsberg. A fire destroyed the building in 1736, but it was rebuilt in its current form in 1766. To this day, the castle remains in the possession of the von Eiselsberg family, which also included the surgeon Anton Eiselsberg. Following the death of Ambassador (ret.) Otto Eiselsberg in 2001, the castle was bequeathed to his nephew Christoph Minutillo, leading to an inheritance dispute.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Schloss_Steinhaus.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: 48.1161, 14.0213