Wittenham ironage roundhouse
© DigVentures
An iron age roundhouse revealed by archaeologists at the site near Wittenham Clumps.
When archaeologists began excavating land near the iron age hillfort at Wittenham Clumps, a famous Oxfordshire landmark, they were hopeful of unearthing something of interest because the area has been occupied for more than 3,000 years. But nothing prepared them for the excitement of discovering an extended iron age settlement, with the remains of more than a dozen roundhouses dating from 400BC to 100BC - as well as an enormous Roman villa built in the late third to early fourth century.

The structures would have remained buried beneath the sprawling green landscape if not for a decision by Earth Trust, the environmental charity that cares for it, to redevelop its visitor centre. Investigating the archaeology was part of the planning application.

Lisa Westcott Wilkins of DigVentures, an archaeology social enterprise, described the discovery as "astonishing". "These were people's homes and, obviously, over the course of the last year, we've all been spending so much time at home. Contemplating the whole idea of 'home' as each one of these houses was coming up, we were thinking about how people were living and how they might have been using their space. That, to me, is the most exciting thing. It's very evocative."

Asked whether they had high expectations when they started the dig, she said: "We hoped. You never really know for sure. We had some idea that there would've been quite a lot of settlement there, but honestly it is astonishing that so much evidence has come up of people's actual daily lives. It's been one of those digs where you feel you can almost reach out and touch them."

Chris Casswell, DigVentures's head of fieldwork, said that previous digs in the area had uncovered evidence of settlers in the bronze age, iron age and Roman times: "But we had no idea there was going to be anything like this." Each of the iron age roundhouses is about 10 metres in diameter. Their inhabitants would have been farmers living off the land.
Ironage round house replica at Castell Henllys
© Premier/Alamy
Replica roundhouses, like these at Castell Henllys in Pembrokeshire, will be built once the dig is finished.
At least three-quarters of the Roman villa is still buried as it exceeds the excavation area, which spans just over one hectare. Although the walls have been reduced to rubble, it gives a clear ground plan for a substantial building with a "winged corridor" design.

The archaeologists also found at least two Roman cemeteries with more than 40 graves and stone-built corn-drying ovens.

Other finds recovered so far include well-preserved iron age pots and two Roman bone combs, surgical instruments and lots of pottery shards.

Westcott Wilkins described the bone combs as "very beautiful personal items in a very high state of preservation".

Casswell said: "It's a substantial iron age settlement. It's probably no surprise because we're right at the foot of Wittenham Clumps, an enormous hillfort. The settlement probably continues well into the landscape beyond where we've looked.

"Normally we go out and do geophysics, which gives an image of what might be under the ground. But on this site, it didn't show up any of this. It showed a couple of anomalies ... So it's completely unexpected."

Jayne Manley, Earth Trust's chief executive, said: "The prominent iron age hillfort, carved from chalk by our ancestors at Wittenham Clumps is an iconic feature of the local landscape. We are so excited about [these] discoveries."

The organisation is now looking at ways to bring these ancient peoples to life, once the dig is finished, by creating three replica iron age roundhouses, to show visitors how the settlement might once have looked.

Casswell said: "[Earth Trust is] trying to promote the environment - and now, hopefully, the historic environment as well."