The remains of the Castle can be visited
CastleZirl
Fragenstein Castle

The castle was probably built around 1200 by the Counts of Andechs. The first known lord of the castle was Hageno de Fragenstain, who appears in documents in 1232. He was an Andechs ministerialis and entrusted with the care of the castle.
Source: wehrbauten.at · Image: http://www.wehrbauten.at
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Location: 47.2784, 11.2389