Beneath the soil of a modern housing development in Nijmegen-West, the echoes of a grand Roman city are rising to the surface—brick by brick, coin by coin. Here, archaeologists have uncovered the largest Roman bathhouse ever found in the Netherlands, a sprawling 4,900-square-meter complex that rewrites what we thought we knew about life on the empire’s northern frontier. 'The Romans did not regard this city as a backwater,' says Radboud University researcher Stephan Mols, who has been closely following the dig. And the numbers prove it: this bathhouse dwarfs those previously discovered in Forum Hadriani and Coriovallum, standing not just as a place of leisure, but as a bold statement of urban ambition.
For over a year, teams from RAAP and BAAC archaeology firms have been excavating the site, commissioned by developer BPD | Bouwfonds Gebiedsontwikkeling. What they’ve found goes far beyond the bathhouse itself—entire city blocks with paved streets, luxurious townhouses, a defensive tower, and exquisite artifacts like a bronze bust of Bacchus, the god of wine, alongside delicate hairpins and jewelry. These are not the remnants of a military outpost scraping by at the edge of civilization. They are the marks of a thriving urban center, Ulpia Noviomagus, granted city rights around 100 AD by Emperor Trajan.
The bathhouse, with its hypocaust heating system and surviving concrete floors propped up by rows of small brick pillars, speaks to advanced engineering. Drainage channels still trace their original paths, and fragments of marble, limestone, and sandstone hint at a once-opulent interior. Though later stripped as a quarry in the Middle Ages, the scale of what remains is staggering. Mols points out that soldiers stationed here would have needed more than duty to occupy their days—so they built spaces of culture, comfort, and community.
Even more remarkable is what this discovery means for modern science. Roman concrete, known for its self-healing properties, is now under study by researchers hoping to apply its principles to sustainable construction today. The bathhouse is not just a relic—it’s a blueprint. As excavations wrap up in July, the collaboration between Radboud University, the archaeologists, and the Valkhof Museum ensures that Ulpia Noviomagus will no longer be overlooked in the story of Roman Europe.
This is more than a local find; it’s a national revelation. Nijmegen wasn’t on the edge of empire—it was at the heart of a vibrant, engineered world. And as those ancient floors see daylight again, they invite us to rethink where sophistication once flourished.