The fort, once a chateau, was originally built in the 11th century where it stood guard over the Charente estuary and was the place for collecting tolls. It was partially destroyed in the 14th century but in the 17th century its strategic position by the Charente river, blocking enemy boats from entering the waterway, meant it became a vital part of France’s defence against the English. Between 1689 and 1693 its walls were reinforced and nine cannons on three levels installed. In 1937 it was made a historic monument and today is home to Le Musée Régional de Fouras whose exhibits contained in 10 rooms tell of the town’s history. Head to the top of the keep for a great view.