The remains of the Castle can be visited
Peggau Castle

The castle ruin of Peggau, a hilltop castle, stands on a rock in Styria, Austria. Its history dates back to the 12th century.
History+
The origins of Peggau Castle likely lie in the 12th century, when the Freien von Peggau built it as their ancestral seat. It served to secure the road from the Mur Valley to Tanneben. Around 1270, the castle was destroyed during a noble revolt against King Ottokar Přemysl, but was rebuilt as early as 1276. Until 1362, it was owned by the Counts of Pfannberg. After their lineage died out, the castle passed to the Counts of Montfort zu Bregenz, who established their Styrian line here and, from 1515, called themselves Montfort-Bregenz-Peggau. In 1596, the castle was sold and has belonged to Vorau Abbey since 1652.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.at
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: 47.2007, 15.3614