An effigial tomb is one carved with recumbent figures of the deceased, and this example bears a knight and his lady rendered in stone. What makes its situation quietly odd is its biography as an object: first recorded in the choir of the friary in 1615, then apparently lost, then dug up from the yard to the south of the church sometime before 1840, and finally installed in its present niche towards the end of the nineteenth century. It has been, at various points, a piece of liturgical furniture, a buried curiosity, and eventually a wall monument.

The tomb belongs to the Butler family, the great Anglo-Norman dynasty whose power was centred on the earldom of Ormond, and its Latin inscription, carved in raised black-letter script, accumulates the dead across nearly a century. The earliest name given is James Galdy, described as son of the Earl of Ormond, who died in 1431. The inscription then moves through Peter Butler, who died in 1464, Thomas Fitz Peter Butler in 1478, Edmund Thomas son of Peter Butler in 1513, and Catherine Poer, wife of Edmund Butler, in 1512. The closing lines shift into a pious request: pray for the souls of Thomas Butler and Ellen Butler his wife, who had this work made in the year 153--, the final digit now lost. The tomb was therefore commissioned in the 1530s as a retrospective memorial, gathering several generations of the family onto a single monument. The side panel, which does not belong to the original, is from a separate seventeenth-century chest tomb and was presumably added at some point during the monument's complicated movements around the site.