They are not a matched set, and that asymmetry is quietly telling: the building accumulated changes across several centuries, each generation leaving its own mark in the limestone and sandstone without much concern for uniformity. The southernmost of the three windows is now blocked internally, and the largest of them, the middle one, measures roughly 2.7 metres high but barely 0.4 metres wide outside, giving it the proportions of an arrow loop rather than anything designed to flood a nave with light.

The church was founded, according to Samuel Lewis writing in 1837, by the de Lacys, a prominent Anglo-Norman family who held considerable power in Munster. The structure itself dates to the thirteenth century, with a transept added onto the south wall sometime in the fifteenth or sixteenth century. By the fifteenth century, references confirm a dedication to St. Nicholas, and the antiquarian Thomas Westropp recorded that this dedication was formalised in 1410. Lewis also noted that the church once contained tombs of several notable families, among them the Roches, Burkes, O'Gradys, and FitzGeralds, and that four chantry chapels, small endowed side-chapels where masses were said for the souls of their founders, had once survived. None of the chantry fabric remains visible today, though Lewis suggested they were on the north side. What does survive on the south wall is a small quatrefoil piscina set into a flat-lintelled niche; a piscina is a shallow stone basin used to drain water from the rinsing of sacred vessels, and its presence here is a small but precise indicator of liturgical use. The south transept's surviving gable retains traces of a cusped pointed window and a matching cusped niche with its own piscina, details that point to a more ambitious phase of construction than the plain rubble limestone of the main walls might suggest.

The ruins occupy the northern quadrant of a graveyard, with Glenogra Castle standing about 210 metres to the south-west and the River Camoge roughly 110 metres to the west. The setting is rural and unhurried. Inside what remains of the walls, it is worth looking closely at the south wall for the chamfered sandstone jambs of the surviving windows, a different material to the limestone used elsewhere, and for the possible opening that may once have connected the nave to the transept. The west gable also rewards attention: an original pointed window was blocked at some point and a smaller rectangular window inserted into the blocking, a layered alteration that says something about how long the building remained in active use.