One small medieval graveslab, just 0.63 metres long and tapering in the manner typical of funerary stonework, was at some point lifted from wherever it originally lay and pressed into service as a threshold stone, set into the doorway connecting the chancel to the Lady chapel. Whoever made that decision was recycling something once intended to mark a grave, repurposing it as a surface to be walked over daily by the canons moving between the two spaces of the church.

Kells Priory, in the townland of Rathduff, was a house of Augustinian canons, an order whose members lived under a communal rule and conducted both liturgical and pastoral duties. The priory is among the more substantial medieval monastic remains surviving in Ireland, and excavations carried out by T. Fanning and M. Clyne recovered a large number of graveslabs across the site. This particular slab carries faint and indeterminate lines that may once have formed a decorative pattern, though whatever design was there has become too worn or damaged to read with certainty. The slab is described as possibly reused, meaning it may have been repurposed more than once in its history before archaeologists catalogued it as part of the wider funerary assemblage. Jaqueline Higgins, who described and catalogued the full collection of slabs from the priory, recorded this one as catalogue number 33 in her 2007 study of the site's medieval funerary monuments.