BANBURY, ENGLAND—A metal detectorist has teamed up with archaeologists from Oxford Archaeology to uncover a Roman villa dating to around A.D. 99, which measures 278 feet square, and may have  been as large as Buckingham Palace, Metro reports. The team believes the site may reveal one of the grandest Roman villas ever discovered in Britain. They have identified the building's bath complex, including tile from a hypocaust used to pipe in hot water, as well as evidence of a domed roof, a dining room, and kitchen areas. Artifacts unearthed include a coin depicting the mythological twins Romulus and Remus. Detectorist Keith Westcott says he was inspired to look for villa foundations in the area after learning that a local farmer had accidently plowed into the burial of a high-status woman, who is believed to have died in the third or fourth century A.D. Plans for comprehensive investigations at the site, possibly involving English Heritage and nearby universities, are under consideration. To read more about the archaeology of Roman houses in Britain, go to "A Villa under the Garden."