It is a large sculpted male head, painted white, with almond-shaped eyes, long aquiline nose, thin-lipped mouth, and prominent jug ears. Ribbing across the crown indicates hair. Set into the fabric of what is otherwise an unremarkable domestic building, it is the kind of detail that most passers-by would never think to look up for.

The head is probably of 15th-century date, and its style closely resembles the carved stone heads that serve as terminals, the decorative end-stops, for the upper internal mouldings of certain windows in the Augustinian priory roughly 400 metres to the north. Augustinian friaries of the later medieval period often featured this kind of figural carving integrated into architectural stonework, and the stylistic match here is close enough to suggest a direct connection. The most plausible explanation is that the head was salvaged from the priory at some point and built into number 7 Castle Street when the house was constructed or altered. Reuse of carved stone from religious houses was common in Ireland after the Dissolution of the Monasteries in the 16th century, when former monastic buildings became convenient quarries for cut and dressed stone. Whether the head was taken deliberately for its ornamental value, or simply gathered up with a cartload of useful masonry, is impossible to say.