The existence of the Fort Risban was first mentioned when it was besieged by the English in November 1346. Edward III of England's troops, finding the defences of Calais impenetrable, decided to erect a small fort to prevent any supplies reaching the town by sea, with a view to starving the inhabitants into submission. Under the English occupation the wooden tower was replaced by a stone structure, the Stone Tower, after 1400 renamed Lancaster Tower, a name often given to the fort itself.
Fort Risban was used by the English forces until 1558 when Calais was restored to France. In 1596, the fort was captured by the Spanish until May 1598 when it was returned to the French following the Treaty of Vervins. It was rebuilt in 1640. Vauban, who visited the fort some time in the 1680s, described it as 'a home for owls, and place to hold the Sabbath' rather than a fortification and let the fortress be altered. In the 19th century the Engineers Corps altered it again. The sea-fortress was dismantled in 1908 but fortified again during World War II when it served as an air raid shelter.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.