The Castle can be visited
Kirchstetten Castle

In Neudorf bei Staatz-Kirchstetten, Lower Austria, is Kirchstetten Castle. Its origins are in the 16th century. The castle houses a ballroom featuring a ceiling fresco.
History+
The core structure of the castle originated in the 16th century as a four-winged complex, once surrounded by a moat and fortifications. In 1723, Matthias von Suttner, an imperial physician, acquired the estate. He commissioned Joseph Emanuel Fischer von Erlach for the Baroque renovation, which gave the castle its current U-shaped form. The Fest-Maulbertsch-Saal is named after Franz Anton Maulbertsch, who created his early work “The Triumph of Truth over Time” here between 1750 and 1752. The hall is complemented by Rococo portraits of the Suttner family by Franz Anton Palko. In the early 20th century, Bertha von Suttner visited her relatives at the castle multiple times.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: https://commons.wikimedia.org/wiki/File:Kirchstetten_Schlo%C3%9F.jpg?uselang=de
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: 48.7305, 16.5106