Work on a new administrative building in Nieuwpoort in northern Belgium has uncovered a mix of medieval remains and a large number of stone cannonballs, highlighting the town’s past as a fortified site.
The excavation, taking place behind the Stadshalle in Nieuwpoort-Stad, began in February 2026 after earlier test trenches indicated the presence of buried remains. The plot lies between the Stadshalle and Willem De Roolaan, an area once close to the town’s defences. Construction of the new civic building is expected to begin later this year.
Archaeologists have been working through several layers of soil and have identified traces linked to the medieval period. These include sections of walls, floor levels, and soil marks that point to earlier activity on the site. The finds sit near the historic belfry and town hall, which have been in use since the 13th century. The exact use of the uncovered structures is still being examined.
The most eye-catching discovery is a group of stone cannonballs found together in one area. Dozens have been recovered so far. They are made from natural stone and come in different sizes, though many appear carefully shaped. Objects like these were used from the late medieval period into the early modern era, either in early cannons or in siege machines.
Their placement suggests they may have been stored rather than lost in battle. The site’s position, close to where the southern city wall once stood, raises the idea that they were kept there for defence. A historical map from 1641 by Antonius Sanderus shows a cannon positioned in roughly the same part of the town, adding to that possibility, though no direct link has been confirmed.
Not all the finds date back to the Middle Ages. During the dig, an unexploded shell from the First World War was uncovered. A specialist disposal unit was called in to deal with it safely. The discovery points to the damage the town experienced during the war, when much of Nieuwpoort was destroyed.
Local officials say the results have been stronger than expected. Ann Gheeraert, who oversees heritage in the town, said the mix of finds reflects different periods of activity on the same ground, from medieval construction to wartime conflict.
Mayor Kris Vandecasteele noted that the site has long been in a key position within the town, close to both civic buildings and former defensive lines. He said building a new administrative centre there continues that long connection between the location and daily life in Nieuwpoort.
Excavation work is due to finish shortly. After that, specialists will study the material in more detail to better understand how the site was used and what the cannonballs were part of.
Header Image Credit : City of Nieuwpoort
Sources : Nieuwpoort
