Surrounded by majestic ramparts, the 13th-century medieval fortress built by Philippe Hurepel is one of the last of its kind still standing, intact, in France. This castle complex became a museum in 1825. Thanks to its location in a city by the sea, it has accumulated dense and varied collections. Many were those who set out from Boulogne to travel the world, only to return and give the museum whatever treasures they had found on the way. A tour round its rooms is a journey from one culture to another, starting with the most antique, a great favourite for children: the Egyptian collections, complete with sarcophagi and mummy; and Greek ceramics. Going on, through the fine art room, there are works by Rodin, Courbet and Corot, alongside Opal Coast artists such as Tattegrain and Boudin, and contemporary artist Georges Mathieu. The tour ends with a unique collection of masks from Alaska and rooms bursting with African and Oceanic art.