Cool Finds

Archaeologists Say They’ve Detected the Largest Stand-Alone Ancient Roman Villa Ever Unearthed in Wales

The mansion’s foundations and floors are likely well-preserved, according to geophysical surveys. The discovery provides new insights into the Roman occupation in the region

Sonja Anderson | Daily Correspondent

January 21, 2026

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Using ground-penetrating radar, researchers in south Wales have uncovered the foundations of an ancient Roman villa. The discovery illuminates the history of Roman occupation in the region, suggesting that it was more than just a military outpost for the empire.

The villa could be the largest known stand-alone structure of its kind to be found in Wales. It was discovered in Margam Country Park, located in the county of Neath Port Talbot, during geophysical surveys by the local company Terradat. The surveys were commissioned by the ArchaeoMargam project, a collaboration between nearby Swansea University’s Center for Heritage Research and Training, Neath Port Talbot Council and Margam Abbey Church.

The project aimed to uncover Margam’s pre-industrial heritage—and according to a statement from Swansea University, “the team struck gold.”

“When I saw the footprint of this site, I was like: ‘My word, this is really big,’” project leader Alex Langlands, an archaeologist at Swansea University, tells the Guardian’s Steven Morris. “It changes the story. Until now, Wales in the Romano-British period has, for the most part, been about legionary forts, Roman practice camps, marching camps, Roman roads.”

In the past, Margam County Park has revealed significant discoveries from the Bronze and Iron Ages, as well as the medieval and post-medieval eras, Langlands explains in the statement. But historians knew very little about the area’s Roman period. The research team expected to find something dating to the Roman era, but they didn’t think they’d make such a significant discovery.

“The surveys went exceptionally well, and the high-resolution magnetometry and GPR data are remarkably clear, identifying and mapping in 3D the villa structure, surrounding ditches and wider layout of the site,” says Christian Bird, Terradat’s technical director, in the statement.

The massive villa’s foundations, located roughly three feet below the surface, stretch about 141 feet long, Langlands tells BBC News’ Steffan Messenger. The “really impressive and prestigious” structure appears to have six main front rooms and two halls leading to eight rear rooms.

Southeast of the mansion is the footprint of another structure, which may have been a meeting hall or agricultural storage facility. The buildings appear to have been surrounded by a defensive enclosure, which covered an area of more than 25,000 square feet.

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“Almost certainly you’ve got a major local dignitary making themselves at home here,” Langlands explains to BBC News. “This would have been quite a busy place—the center of a big agricultural estate and lots of people coming and going.”

After the Romans invaded Britain in 43 C.E., they built structures such as military forts, roads, walls and baths. In Wales, most Roman ruins were built for the army, like the large Roman fortress and bath complex in nearby Caerleon. Stately Roman homes aren’t commonly found in Wales. However, the newly discovered foundations remind Langlands of sites found in Gloucestershire, Somerset and Dorset.

The newly discovered villa could demonstrate that Wales wasn’t just a “kind of liminal borderland,” Langlands says to the New York Times’ Stephen Castle. Instead, it may have been “just as Roman as anywhere else we’ve got in the heartlands of the province of Britannia.”

As the archaeologist explains in the statement, it’s too early to date the Margam villa or determine who built it. However, he tells the Guardian, “I think we’re in the fourth century—it really fits that kind of late Roman flourish that we see in the southwest of Britain.”

Because Margam has been a deer park since at least the Middle Ages, it has not been disturbed by agricultural plowing. As such, researchers are hoping to find the villa to be well-preserved when they eventually excavate it, and the surveys indicate that much of the villa’s flooring and foundations are intact. The team has optimistically nicknamed the site “the Port Talbot Pompeii,” in reference to the Roman city that was covered in volcanic ash in 79 C.E.

“Wherever you get villas like this, they’re almost certainly surrounded by other edifices of the period,” Langlands says in a video from Swansea University. “We’ve probably got trading centers here. We know we’ve got the Roman roads here. There should be a bathhouse somewhere, and almost certainly there’ll be other small Roman farmsteads.”

Researchers are keeping the exact location of the buried villa a secret to prevent outsiders from illegally digging on the site before the experts. The team shared its findings with the local community at Margam Abbey Church on January 17.

“It’s out of this world,” Margaret Jones, a retired teacher from Port Talbot, tells BBC News. “I’m still a bit shellshocked at the thought that this place where I played, where my children and grandchildren have played—that under our feet was this incredible house.”

Editors’ note, January 22, 2026: This article has been updated to include more information about the early stages of the discovery.

Sonja Anderson | Read More

Sonja Anderson is a daily correspondent for Smithsonian magazine who covers art, archaeology and culture, from newly discovered artifacts to the latest art heists.