In 1692 the naval Battle of La Hougue took place between the English and the French close to the island of Tatihou. The so-called Vauban Tower (Tour Vauban de Tatihou) was built in 1694. In 1756 the surroundings of La Hougue were defended by many batteries and forts, but the lack of regular maintenance ensured that these quickly fell into disrepair. In 1720 Tatihou was used for quarantining plague victims from Marseilles.
Vauban Tower is part of the UNESCO World Heritage site of Vauban Fortifications around the France.References:
The Château Comtal (Count’s Castle) is a medieval castle within the Cité of Carcassonne, the largest city in Europe with its city walls still intact. The Château Comtal has a strong claim to be called a 'Cathar Castle'. When the Catholic Crusader army arrived in 1209 they first attacked Raymond-Roger Trencavel's castrum at Bèziers and then moved on to his main stronghold at Carcassonne.
The castle with rectangular shape is separated from the city by a deep ditch and defended by two barbicans. There are six towers curtain walls.
The castle was restored in 1853 by the architect Eugène Viollet-le-Duc. It was added to the UNESCO list of World Heritage Sites in 1997.