What makes the site at Kilmacow in County Limerick particularly strange is that the building was deliberately demolished around 1880, and its rubble used to fill in the very ditch that once defined the enclosure surrounding it. The circular earthwork, a form of enclosure sometimes called a ringfort, was effectively packed with the remnants of the structure it had contained for centuries. Today there is no visible surface trace of what once stood at the centre.

When the Ordnance Survey recorded the site in 1840, the church was still standing, at least partially. Its walls had survived to their full height, though the western gable had vanished entirely. The building measured roughly 17.46 metres east to west and 5.7 metres north to south, and retained several architectural features that give some sense of its character: a single-light window in the east gable, a round-headed window with an arched embrasure near the east end of the north wall, and a much-ruined door and window opening in the south wall. Particularly notable were two aumbries, small recessed cupboards built into a wall for storing liturgical vessels, positioned one on each side of the east window. The antiquarian T. J. Westropp recorded these details in 1904 to 1905, drawing on the earlier survey accounts. A church is documented at the place recorded as 'Kylmecho' by at least 1319, and while the round-headed window might plausibly date to that period, the building as described could equally belong to the fifteenth century. By around 1880, according to Molony writing in 1905, whatever remained had been knocked down and the stone carted off to serve as fill.

Because the structure was demolished and its rubble used as infill, there is nothing architectural left to observe on the ground. The site sits within what was once a circular enclosure, though the ditch itself was deliberately obscured in the same episode of clearance. Anyone visiting would be looking at an absence rather than a presence, a field where a medieval church once stood, stripped of its stone and its outline in the same decade. The record that survives is almost entirely a paper one, preserved in the Ordnance Survey Letters, in Westropp's fieldwork, and in Molony's brief but significant note about what was lost and where it went.