Archaeologists made the discovery near the Kassam Stadium after a valuation was carried out as part of a planning application for a new hotel.
Paul Murray, from John Moore Heritage Services, described the discovery of the burials as “amazing”.
The derelict Priory pub is the only building that remains of a nunnery founded on the site in 1110AD.
Whilst its location was known to experts, the full extent of its contents is only now becoming clear.
A series of “very unusual burials” were found at the site, including a woman found in a face down position, another who was a victim of blunt force trauma to the back of the head, and a stillborn child.
