TOUR SAINT-CLAIR À DERVAL

Le Bas Château - route de Mouais, 44590 Derval

The only remaining part of Derval Castle, which had no fewer than nine towers in the 12th century. Follow the trail and discover not only its history but also that of the Marches of Brittany, of which Derval was a stronghold.

The only remaining part of a 13th-century castle, the Saint-Clair Tower bears witness to the fact that Derval was once one of the strongholds of the Marches of Brittany. In 1598, the Edict of Nantes ordered the demolition of the castle, which was then a stronghold of the League. The almost complete destruction did not take place straight away, as the fortress had to be used as a prison for Protestants captured during the siege of Port-Louis in Morbihan. The site was subsequently used as a stone quarry by the people of Derval. Information panels on site. Watch the video report produced by the Tourist Office: > short version: https://youtu.be/kjFbofujOKI > full version: https://youtu.be/3uwlwLITnJI

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Listing provided by Bureau d'information touristique de Derval (updated by the source on 08/09/2026).

Tourist office data: DATAtourisme, Licence Ouverte (French open licence), updated 22 October 2026.