Fortress

Vieux-château de l'Île d'Yeu

France L'Île-d'Yeu classified historical monument
Vieux-château de l'Île d'Yeu
Vieux-château de l'Île d'Yeu · Wikipedia

About

The Old Castle is a castle built in the 14th century on the island of Yeu (comune of L'Île-d'Yeu), covering three centuries of island history. It was classified as historical monuments in 1900.