Whether it was a deliberate act of reuse, a moment of carelessness, or simply the pragmatic recycling of an old carved slab to serve a new structural purpose, the result is that a small inscribed cross-slab now sits inverted against the south wall of St. Caimin's church on Inis Cealtra, the island monastery on Lough Derg in County Clare. It is a modest piece, just over half a metre tall and a third of a metre wide, but its awkward orientation gives it an odd, slightly unsettled quality among the other stonework around it.

The slab was recovered during excavations carried out between 1970 and 1972 and bears a Latin cross, the type with square expanded terminals at each arm and a square at the centre, all contained within a double-lined rectangular frame. A cross-slab is essentially a flat stone dressed with a cross motif, often funerary in purpose, and common across early medieval Irish monastic sites. What sets this one apart from many such stones is the inscription carved into the upper quadrant: two lines of text reading "FLA[ITH]BERTACH", a personal name rendered in early medieval Irish. The bracketed portion indicates a damaged or unclear section reconstructed by scholars. The name Flaithbertach is not unique to this stone; it appears again on a second cross-slab elsewhere in the same church, which is a notable coincidence, or possibly a sign that the name belonged to someone significant enough within the community to be commemorated twice, or that two different individuals shared it. Okasha and Forsyth, writing in 2001, catalogued both stones and provide the detailed readings.