To be privately owned
Trauttmansdorff Palace

In Graz, the Palais Trauttmansdorff is a former residence located in the Innere Stadt district, which evolved from two separate houses into one of Graz's largest city palaces and stands today after renovations.
History+
The origins of Palais Trauttmansdorff date back to 1525, when one of the two houses in Bürgergasse, which would later form the palace, was already owned by a lady from the Trauttmansdorff family. The second house was acquired in 1614 by Sigmund Friedrich von Trauttmansdorff, who subsequently had the two buildings merged into a city palace between 1615 and 1620. Following Count Alois Trauttmansdorff's purchase of Palais Herberstein, Palais Trauttmansdorff became the largest city palace in Graz. Around 1720, the late Renaissance facade underwent a Baroque transformation. In 1850, an interior renovation was carried out by master builder Georg Lindner, after which the palace was rented out. A bomb hit during World War II on November 1, 1944, destroyed one wing.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Palais_Trauttmansdorff_Graz.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: 47.0710, 15.4424