Ruined Undercroft at St Mary's Abbey

Three-bay vaulted structure orientated E-W of roughly coursed stone with quoins. Arcade of 3 pointed arches surviving to just above apex level, but the E arch of the N side is no longer extant. Low impost band to arches, chamfered to underside. Pilasters to fronts of piers. Wide arches to E and W ends, the dressings no longer surviving. The E piers are built into short N-S walls with quoins, possibly demarcating a corridor or range beyond. A break in this wall further N suggests a doorway. Large pier or wall fragment against N side of NW pier, while a short wall joins the W side of the SW pier. Quadripartite ribbed vaults survive to the W and central bays. Low scalloped corbels between the vaults support chamfered ribs.