To be privately owned
Gradisch Castle

In the village of Gradisch south of Feldkirchen in Carinthia stands a prominent Renaissance building from the mid-16th century: Gradisch Castle. It is at an elevation of approximately 670 meters above sea level.
History+
The origins of Gradisch Castle possibly trace back to a medieval noble seat, whose name “Gradisch” suggests a former castle site. This earlier structure might have been named after the noble family Paradeiser, who are documented from 1192 as ministerials of the Carinthian dukes. A first documentary mention of a family seat occurred in 1250, though it remains unclear whether this referred to the current location or Prägrad Castle. In the 14th century, the trail of the Paradeiser family disappears. In 1550, Ferdinand I granted Georg von Neuhaus-Paradeiser the castle immunity for his newly built residence Gradisch. Eva Regina Paradeiser sold the castle in 1652 to Johann Freiherr von Platz.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Feldkirchen_Gradisch_1_Schloss_Gradisch_11062006_444.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: 46.6850, 14.1206