It is a recumbent graveslab, the kind of medieval marker that once covered a burial and identified the person beneath, usually through inscription or carved imagery. This one carries a Latin cross in relief, the design raised slightly from the surface of the stone rather than cut into it, giving the decoration a quiet solidity that has outlasted whoever commissioned it.

The slab measures 1.34 metres in length and tapers from 0.63 metres at its widest, with a thickness of 0.11 metres. It is limestone, the material of choice for medieval carvers across the Irish midlands, durable enough to survive outdoors for centuries but not immune to fracture. The priory it belongs to was an Augustinian foundation, one of the religious houses that shaped Lorrha's ecclesiastical character throughout the medieval period. The Augustinians, a mendicant order who arrived in Ireland during the thirteenth century, typically built their priories in or near existing settlements, and Lorrha already had a long monastic history before they came. The graveslab almost certainly post-dates the foundation of the priory, though without inscription it is difficult to assign it a precise date or connect it to any named individual.