The survival of the walls and gates shows that the Roman street pattern survived, at least in part, inside the fortress. Certainly excavations beneath York Minster have shown that the great hall of the Roman headquarters building still stood and was used until the 9th century.
The remnants of the fort's walls and gates indicate that parts of the Roman street pattern persisted inside the fortress. Excavations at York Minster have shown that the central hall of the Roman command center stood and was used up to the 9th century.