Fort du Chapus

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Origin and history

Fort Louvois, also known as fort du Chapus, is a maritime fortification built on a rock facing the citadel of Château-d'Oléron, in the commune of Bourcefranc-le-Chapus, Charente-Maritime. Built in the late 17th century under the reign of Louis XIV, it is part of a network of coastal defences designed to protect the Rochefort arsenal. Its strategic position in the Maumusson Pertuis, between the island of Oléron and the continent, allowed it to control maritime access. The fort consists of a 24-metre-high dungeon, surrounded by submersible moat at high tide, and a horse iron enclosure housing barracks, powderbox and shops.

The construction began in 1691 according to the plans of the Marquis de Louvois, Minister of War, under the direction of the Royal Engineer François Ferry. After Louvois's death in the same year, Vauban took over the project and reduced its ambition, giving it its definitive form of horse iron. The work, carried out day and night, was completed in 1694. In the 18th century, the fort was modernized to adapt to the progress of armament, notably by reducing the number of cannons. He retained an active garrison until the 19th century, before being decommissioned in 1889.

Ranked a historic monument in 1929, the fort suffered heavy damage during World War II, especially when Marennes was liberated in 1944. Restored in the 1960s, it has been home to the Oyster Museum and an exhibition on its history since 1972. Despite the storms, like Xynthia in 2010 which damaged the drawbridge, there remains a major tourist site, attracting more than 26,000 visitors annually. Its unique architecture, with its submersible pavement and scauguettes, makes it a remarkable witness to the maritime fortifications of Louis XIV's era.

The fort is connected to the continent by a 400-metre carriageway, submersible at high tide, reinforcing its defensive character. His dungeon, dominated by a scald, offered a strategic perspective on the horizon. The shield adorned the salient was mutilated during the Revolution. Today, Fort Louvois combines military heritage and local culture, illustrating the ingenuity of 17th century coastal fortifications and their adaptation to the maritime challenges of the time.

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