To be privately owned
Harmannsdorf Castle

In the Lower Austrian village of Harmannsdorf stands Harmannsdorf Castle. It is a two-story, square-shaped building enclosing a square courtyard and surrounded by a deep, former moat.
History+
The origins of the complex date back to around 1280, when a small defensive structure was documented in connection with a knight from Hadmarstorff. In 1499, the manor was known as the “Höllturm” (Hell Tower) and marked an important border point of three regional courts. In 1612, it was transformed into a moated castle, incorporating older elements and the medieval keep. Extensive Baroque renovations around 1760 led to the creation of a French garden with a grand staircase.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:GuentherZ_2011-07-09_0068_Harmannsdorf_Schloss.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: 48.6017, 15.7420