Sitting on the ground floor of Kinsale Museum inside the old Market House, this fragment is the upper portion of a two-light ogee-headed window, meaning a window divided into two openings, each topped with an S-shaped curve that tapers to a point, a form fashionable in late medieval Irish stonework. The piece measures just 80 centimetres across, yet packed into that span are two heraldic programmes and a vocabulary of ornament that places it firmly in the late 15th or early 16th century.

The carving is done in false relief, where the design is cut into the surface rather than projecting from it, giving the decoration a flattened, graphic quality typical of the period. The central spandrel, the roughly triangular space between the two arched lights, carries the coat-of-arms of the Roche family, one of the powerful Anglo-Norman dynasties that shaped Munster's medieval landscape. Flanking the arms on either side is a carved stem ending in a single leaf. The corner spandrels, the spaces at either end of the block, each bear a Tudor rose, that familiar five-petalled emblem associated with the English Crown from the late 15th century onward. Taken together, the imagery suggests a merchant of considerable standing, someone with both dynastic pride and an eye on political fashion. The fragment's last known address before the museum was Roche's bond house in Kinsale, a commercial storage building, where it had been reused as building material. When that structure was demolished, the stone was rescued and brought to the museum. Where it stood originally is not known, though its quality points clearly to one of the prosperous merchant houses that once lined the streets of this busy harbour town.

The museum occupies the old Market House near the centre of Kinsale, and the fragment sits on the ground floor among other salvaged stonework. It rewards a close look; the detail in the spandrels is easy to miss if you move past it quickly, and the juxtaposition of Roche heraldry with Tudor ornament says something quietly interesting about how Kinsale's merchant class navigated the worlds of Gaelic lineage and English allegiance in the decades before the Nine Years' War changed everything.