Castle of Eaucourt-sur-Somme

The Castle of Eaucourt-sur-Somme is a ruined medieval stronghold on the banks of the Somme river, in the small village of Eaucourt-sur-Somme in the Hauts-de-France region, within the historic county of Ponthieu.

How old is the castle?

The first structure went up at the turn of the 12th and 13th centuries as a maison forte — a fortified residence built on the river's left bank, on low-lying ground just outside the village. The marshy setting was deliberate: water surrounding the foundations formed a natural defensive barrier, and the site's position by a river crossing let its lords control traffic and trade moving along the Somme.

What happened to it during the Hundred Years' War?

The castle's roughest chapter came during the Hundred Years' War. In June 1421 it fell to combined English and Burgundian forces, only to be retaken soon after by supporters of the French Dauphin under Jacques d'Harcourt. In response, Philip the Good, Duke of Burgundy, had the abandoned castle burned. Jean d'Eaucourt rebuilt it in 1436, but peace didn't last — in 1440 mercenary captain Pierre Renaud de Vignolles plundered the stronghold. A further blow landed in the second half of the 16th century, when fighting tied to the Catholic League during the Wars of Religion left part of the castle dismantled.

Why is it a ruin today?

The estate stayed in the hands of noble families for a while longer, but from the 18th century onward it steadily lost importance and was gradually abandoned. That slow decline left the castle in the ruined state it's in today. In 1926 it was listed as a historic monument, kicking off a long process of protecting what remained. A turning point came in 2016, when the ruins were purchased by the municipality of Eaucourt-sur-Somme; an archaeological research programme has also been running on site since 2015, gradually uncovering the original layout of the buildings.

What is there to see on site?

The grounds now blend genuine medieval ruins with living history. Restoration campaigns have been underway for several decades, and the site now hosts medieval-themed events, craft workshops, and demonstrations for schools and groups. During the summer Médiévales d'Eaucourt festival, running from mid-July to mid-August, visitors can try on armour, have a go at crossbow shooting, learn stonecutting and leatherworking, and find out how medicinal plants were used in the Middle Ages.

How do you get there, and when's the best time to visit?

The castle sits at 300 Rue du Pont, right in Eaucourt-sur-Somme, close to the Baie de Somme — a region known for its bird reserves and cycling routes. The best time to come is during the summer historical festivals, when the site is at its liveliest, though the ruins and the surrounding Somme valley landscape are worth a visit at any time of year.

Frequently asked questions

How old is the Castle of Eaucourt-sur-Somme? The original structure dates to the turn of the 12th and 13th centuries as a fortified residence, and later rebuilding — notably in 1436 — shaped the layout known from historical sources.

Can visitors go inside? Yes, the ruins are open to visitors, and in summer the site hosts festivals and workshops centred on medieval crafts and life.

Why is the castle in ruins? Damage from the Hundred Years' War, partial demolition during the 16th-century Wars of Religion, and gradual abandonment from the 18th century onward left it in its current state.

Who manages the castle today? Since 2016 the ruins have belonged to the municipality of Eaucourt-sur-Somme, which oversees conservation work and supports the ongoing archaeological research on site.