Builders working at the Old Bell Hotel in Malmesbury have turned up human bones which are believed to be Roman.
The hotel the bones were found under dates back to 1220
It was thought at first that the remains might be medieval and connected to the Abbey next door.
But archaeologists now say the skeletons could date back 2000 years due to the non-Christian burial style.
Simon Haggarty, Director of The Old Bell, said: "The hotel dates back to 1220 so it's not surprising that these bones are even earlier than that."