This inescapable citadel, dating from 1630, is a military work intended to protect the southern part of the island of Oleron.
A military structure designed to protect the southern part of the island of Oleron, the citadel was built in 1630. Noting the weaknesses of the structure, the chief engineer Vauban decided in 1685 to create two horned works. The work, carried out three years later, required the presence of 7,000 workers, including salt workers from Dolus and Saint-Trojan. Converted into a prison, then housing a garrison, it was hit by a bombing during the Second World War. Not to be missed!
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