You are walking through the gates of Boulogne's medieval Château-Musée, crossing the high and narrow stone bridge across the moat, and looking up at its towering stone walls.
The castle was built in the 13th century as the stronghold of the Count of Boulogne, who effectively ruled this area in the Middle Ages when the French kingdom was much weaker and fragmented.
The Museum started elsewhere in 1825 with the Viscount de Barde's collection of antiques and memorabilia.
The castle was built in the 13th century by Philippe Hurepel (1180-1234), count of Boulogne and son of Philip II of France. Following the death of his half-brother, king Louis VIII after a short three-year reign, Hurepel was one of the leaders of a rebellion against the regent, Blanche de Castille, mother of the minor Louis IX. He constructed castles at Calais and Hardelot and refortified Boulogne. The castle is built in the eastern corner of the medieval walls surrounding the Haute Ville (literally, high town - the part of Bologne on the hill). The walls themselves were reconstructed by Hurepel. The eastern part of the castle was built over a corner of the Roman wall, parts of which are still visible in the basement. Housing together the political, legal and economic powers of the time, it was also a residential and defensive site.
Various modifications have taken place. Major alterations were carried out by the duc de Berry between 1394 et 1416. The horse shoe shape (barracks, arsenal) was completed around 1567. After being adapted because of developments in artillery during the 16th century, it lost some of its medieval character. In 1767, it became a barracks and, after World War II, it also housed a prison. In 1974, the town council took over ownership of the castle and decided to install its museum collections.
Unlike many other contemporary castles of the early 13th century, the plan of the castle does not include a keep. The remains of Château de Hardelot in nearby Condette show that Hurepel used this design for at least one other castle. A similar castle was built around the same time at Fère-en-Tardenois by the Counts of Dreux. The Château de Boulogne is listed by the French Ministry of Culture as a monument historique.