The ruins which are largely early to mid 12th century comprise the remains of the south arcade and some buttresses of the Infirmary Hall and much of the Infirmary Chapel. The Infirmary Chapel was erected in Prior Wibert's time and still contains some fine but badly eroded sculpture. The south arcade, south wall and most of the ruined chancel are extant. Inserted into the mid 12th century walls are three 14th century windows. The chapel was damaged in an earthquake in 1382 and repaired 1383-4.