The St Mary's and St Leonard's section of York City Walls covers the main city defences in the St Leonard's area, plus the defences for St Mary's Abbey.

The standing remains of York City Walls and St Mary's Abbey defences have been designated Scheduled Ancient Monuments and are Grade I listed.

From circa 1354 to the end of the 17th century, a wall ran parallel with the bank of the River Ouse from a point a few yards to the southwest of Tower A (which was part of St Mary's Abbey defences) towards Lendal Tower (which was part of the main city defences). However, all traces of this river-facing wallhad been completely removed by 1736, as recorded in the following contemporary account:

The foundations of the wall which faced and ran parallel with the river, were of late years dug up, which I my self saw run very deep in the ground, and all ashler stone. The stone was carried to build the Staith, or Key, on, which is now at Lendal-ferry. The kitchens and other offices of the abbey have been built near this wall; some vestiges of them do yet appear.

Source: Drake, F., Eboracum: History and Antiquities of the City of York (1736), p577.

General views of the Walls