To be privately owned
CastleAlthofen
Althofen Castle

The Historic Building: Althofen Castle (Frohnfeste)+
Althofen Castle (Frohnfeste) is already mentioned in 953 as being in the possession of the Bishops of Salzburg.
Architectural History and Development+
The castle was originally built as a Romanesque fortress.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:AT-61343_Burg,_ehem._Fronfeste,_Althofen_01.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: 46.8760, 14.4738