To be privately owned
CastleWeinfelden
Weinfelden Castle

In 1180, the Counts of Kyburg were the owners of "Castrum Winveldem". Later, it belonged to the Dukes of Austria and the Lords of Bussnang. Apparently, this building had fallen into ruin, so that in 1431, one half of the property was sold to the city of Constance, and the other half to Bertold Vo …
Source: swisscastles.ch
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Location: 47.5765, 9.1089