This museum, at the heart of the citadel, is in a former tobacco warehouse, a beautiful building built right on the waterside in 1850. It's one of the very few buildings to have come out of the Second World War intact. It presents the thousand-year-old history of the port of Dunkirk, whose strategic position in the North Sea has made it first a Spanish stronghold, then an impregnable fortress under Louis XIV, then a city of privateers and later the scene of Operation Dynamo. The tour is completed by a floating museum: three boats are moored in front of the port museum, each of which give a vivid impression of what life was like on board: a sailing ship (the Duchesse-Anne), a lightship (the Sandettie) and a barge (the Guilde). The museum organizes a host of educational and cultural activities for schools and the public at large.