To be privately owned
Voglsang Castle

Voglsang Castle, also known as Matuschka Castle, is a historic estate in the municipality of Losenstein in the Enns Valley of Upper Austria. It has an elongated design and connects two building sections by a gatehouse.
History+
The earliest known records mention a countess as the first owner around the year 1778. Later, the castle was owned for 25 years by a Baron von Voglsang, whose name it still bears today. Subsequently, Hannes von Matuschka, who already owned Lindach Castle near Roitham, acquired the property, leading to its alternative name, Matuschka Castle.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Schloss_Voglsang.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: 47.9394, 14.4266