The Door That Opens Into Nothing — France's Deadliest Castle Secrets

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Published Oct 24, 2026

Inside three of the most formidable medieval castles ever built in France: Château de Beynac, Château de Fougères, and Château d'If. This castle documentary explores nearly 1,000 years of castle architecture, siege warfare, and military engineering, from cliffside castle fortresses to island castle prisons. See how medieval castle builders designed traps, barbicans, and defenses capable of withstanding cannons, trebuchets, and armies. A journey through French castle history and the engineering that shaped the Middle Ages.

#documentary #castle

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Interesting links and sources:
https://castlescatalog.com/guides/the-complete-history-of-castles-worldwide/
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