Two bullaun stones, ancient bowl-shaped depressions hollowed into boulders that were used for grinding, ritual, or both, sit quietly embedded in the outer walls of this ruined medieval church at Coolbunnia in County Waterford. One is set into the north wall of the chancel; another into the western boundary of the graveyard itself. Their positioning, built into the very fabric of later construction rather than set aside as curiosities, suggests a long, layered relationship between this site and the communities who kept returning to it across centuries.

The church served as the early ecclesiastical and parish church of Faithlegg, and the building itself carries the marks of at least two distinct phases of construction. The 13th-century pointed doorway in the west gable is made from Dundry stone, a distinctive oolitic limestone quarried near Bristol and imported into Ireland and Wales by medieval builders who valued its fine grain and workability. Above it sits a double bellcote. A round arch inside, just 1.15 metres wide, is older still, the original doorway of an earlier church that was eventually absorbed into the structure as a passage leading to the chancel. The chancel retains a small lancet window, also of Dundry stone, and the ghost of a steeply pitched earlier roof is still visible in the masonry of the chancel's west face. Several elliptical-headed windows and a loft-level window in the west gable were probably added in the 16th century, giving the building a quietly composite character. The font, circular with seven vertical outer ribs and two notches for securing a cover, has been moved to the adjacent Catholic church to the north for safekeeping. The graveyard enclosure, roughly 60 metres east to west and 30 metres north to south, is defined by stone-faced earthen banks on the east and south sides and masonry walls to the west and north. Approximately 240 metres to the south lie the remains of a motte, a flat-topped earthen mound typical of early Norman fortification, and a tower house site; some 80 metres to the north is the site of Tobershonock Well.