Château de Fressin, Medieval castle ruins in Fressin, France

Château de Fressin is a fortress site in northern France with eight cylindrical towers and defensive bastions designed for artillery use in the 15th century. The ruins contain underground passages, chambers, and wells that have been uncovered through archaeological work.

Jean V de Créquy, an advisor to Philip the Good, built this military stronghold in the 1450s during a time of regional conflict. The fortress was destroyed by Balthazar de Fargues in 1658 and subsequently abandoned.

The castle's name comes from the village of Fressin in the Pas-de-Calais. Since 1996 the ruins, including the ground and the underground, have been listed as monuments historiques. An exhibition room in the ruins presents the construction techniques and daily life of the period, and the underground passages can be visited.

The archaeological site opens to visitors during summer months with access to uncovered underground passages, chambers, and wells. Guided tours help you navigate the complex layout and multiple levels of the ruins.

The castle passed down through Jean V de Créquy's descendants until the French Revolution, surviving the region's constant disputes between France, Burgundy and Spain from the early 16th century to the 1639 capture of Hesdin and the 1659 Treaty of the Pyrenees.