The remains of the Castle can be visited
CastleHinterbrühl-Sparbach
Johannstein Castle

The time of the castle's construction is as unknown as most of its history. For the longest time, it was a princely fief, whose holders were probably not very significant nobles.
Source: wehrbauten.at · Image: http://www.panoramio.com/photo/105854570
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Location: 48.0854, 16.1847