Most people walking past would have no reason to stop. The stonework has been so thoroughly absorbed into later construction that it takes some knowledge of what to look for before the medieval detail begins to resolve itself out of the general clutter of the streetscape.

The priory was dedicated to St. John and was already established by 1306, according to the historical record compiled by Gwynn and Hadcock. The nineteenth-century antiquarian Hayman was among the first to identify this gable as its remains, and later scholarship filled in the architectural detail. Writing in 1945, O'Sullivan described a pointed and delicately moulded sandstone doorway set within a square-headed outer moulding, a common Romanesque and Gothic combination in which a rounded or pointed arch is framed by a right-angled hood. Directly above the doorway sits a single-light ogee window, its double-curved pointed arch being a form particularly associated with the decorated Gothic style of the thirteenth and fourteenth centuries. Further along a narrow internal passage, two liturgical fittings survive: a piscina, a small stone basin set into the wall where a priest would rinse the chalice and his fingers after Mass, and a square aumbry, a cupboard-like recess used to store sacred vessels and books. Hayman also noted the possibility of further features to the rear of the building, though these have not been systematically described in the sources that followed him.

The gable sits on a busy commercial street, and there is no formal access or signage to speak of. The surviving features are architectural rather than monumental, meaning the interest lies in recognising what the stonework once was rather than in any dramatic visual effect. The pointed doorway and the ogee window are the clearest indicators of the building's earlier life, and the passage with its piscina and aumbry represents a rare survival of liturgical interior detail in what is now a thoroughly secular setting.