, Medieval fortress in Seyssuel, France
The stone castle remains include a square keep and sections of main residence walls standing above the Rhone River at 325 meters elevation.
Built in the 12th century as an episcopal castle, the fortress belonged to the archbishops of Vienne who used it to monitor communication routes.
The castle ruins represent the best-preserved medieval defensive structure in the Isère department, earning historical monument status in 1994.
While the property remains private, visitors can observe the exterior portions of the castle ruins by following pedestrian paths from the main road.
The fortress suffered two major destructions: first burned in 1409 by the Torchefelon brothers, then dismantled by Huguenots during the 16th-century religious wars.
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