Its south-facing doorway is one of its more quietly telling features: a flat lintel resting on corbels, the projecting stones that carry its weight, measuring just under five feet eight inches high and less than three feet wide. By 1840, the centre stone of the doorway surround had already fallen away, and ivy had begun its slow work on the entrance. The walls, built of large stones laid with little regularity and mortared with lime and sand, still stood around ten feet high at that point, giving the shell a stolid, enduring presence even in its damaged state.

The antiquarian Thomas Johnson Westropp, writing in 1904 and 1905, traced the church's name through several centuries of documentary records: Kilmolan in 1302, Keilmualain in 1410, Kilmolan again in 1418, and finally Kilmoylan by 1615. The building itself he described as a late, plain church, compact in scale at roughly ten and a half metres long by five and a half metres wide. The west gable, which once closed off one end of this modest rectangle, collapsed in 1839. A 1840 account recorded that two windows had also been disfigured by that point, one on the east gable and a second on the south wall, close to where the fallen gable once stood. The graveyard surrounding the church was, at that time, still actively in use, suggesting the site retained its place in local life even as the building itself deteriorated.

Kilmoylan is in County Limerick, and the church sits within a graveyard that, depending on local practice, may still be maintained. The doorway in the south wall, the detail most carefully recorded in the Ordnance Survey letters of the 1840s, is worth examining closely if access allows. The flat lintel and corbelled construction, along with the hammered stonework, give some sense of the building's original character even now. Those with an interest in how parish boundaries were historically drawn may find the church's extreme eastern placement worth pondering; it is the kind of geographical quirk that rarely gets explained in the surviving record.