Elevation showing remains of a medieval masonry building with steps leading down into an undercroft. The door was of Caen stone with a surviving iron pintle, the internal walls were of chalk blocks, and the side walls to the steps in decorative flint and chalk chequerwork. A second set of steps had been inserted at a later date
The building was discovered during archaeological excavation of a 3 m by 3 m pit for a lift shaft. The building has been interpreted as a laying out chapel at the entrance to the St Mary Spital cemetery and was destroyed at Dissolution in 1539.
The building is largely preserved beneath the new development.
