The remains of the Castle can be visited
Hohenburg Castle

West of Spittal an der Drau in Carinthia, Austria, lies the Hohenburg castle ruin, a formerly significant medieval section castle. Its remaining walls date back to the 12th century.
History+
The first documented mention of Hohenburg occurred in 1142 as "castrum Hohenburc". It served as the ancestral seat of the Counts of Lurn, who administered the Lurngau. After the death of Bishop Altmann of Trent in 1149, the castle came into the possession of the Archbishopric of Salzburg. In 1311, the Archbishop of Salzburg enfeoffed the Counts of Ortenburg with parts of Hohenburg. Its significance waned as Feldsberg Castle rose to become the new Salzburg administrative seat. It is presumed that Hohenburg was destroyed during conflicts between the Counts of Görz and Emperor Frederick III. The former castle chapel was converted into the pilgrimage church Maria in Hohenburg in 1707 and has thus been preserved.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Hohenburg_11.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: 46.8525, 13.4080