The ancient cloisters of Greyfriars Priory and the remains of a medieval tiled floor have been uncovered during an archaeological dig in Gloucester.
The excavation was carried out by a small group of amateur diggers who were supervised by Cotswold Archaeology.
Chief executive Neil Holbrook said: "We knew the cloisters existed but no-one has ever seen them before."
All the findings, such as pottery, will be recorded and then exhibited at Gloucester Museum later in the year.
"In a sense, we knew there would be something, as the remains of the church are still a landmark in Gloucester today," said Mr Holbrook.