To be privately owned
Parz Water Castle

Wasserschloss Parz, a structure in the Upper Austrian town of Grieskirchen, transformed from a moated castle to a palace.
History+
The origins of Wasserschloss Parz date back, with the exact construction period of the original moated castle remaining unknown. The complex was first documented in 1220 in connection with Wernhart dem Lehrbühler. In 1514, the dominion of Parz, and thus the moated castle, came into the possession of Sigmund Ludwig von Pollheim. Around 1800, the building underwent extensive reconstruction, with only fragments of the original moated castle remaining.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Parz_-_Wasserschloss.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: 48.2346, 13.8450