What makes it quietly remarkable is not just its setting but its interior arrangement: a cross wall divides the building into two distinct sections, and tucked into the western end is a two-storey suite of rooms, one above the other, connected by what was probably a ladder. These small chambers served as the priest's quarters, but the lower room may also have functioned as a sacristy or, more intriguingly, a scriptorium, a room for writing and storing manuscripts.

That possibility is grounded in a specific, documented loss. The Annals of the Four Masters recorded that in 1416 the church burned, taking with it the Sceaptra ui Chuirnin, described as a library or manuscript house, along with the Leabhar-Gearr, meaning the Short Book, belonging to the O'Cuirnin family, and many other precious articles. The O'Cuirnins are thought to have been erenaghs, hereditary ecclesiastical officials who managed church lands and resources across generations. Tradition holds that the original foundation was made by St. Loman, son of Dallan, said to be a contemporary of St. Columcille in the sixth century, though the surviving fabric is considerably later in date. By the time Francis Grose published a drawing of the ruin in 1791, based on an illustration by Bigari, the building was already roofless and partly collapsed, suggesting the structure had been abandoned well before that point.

The building itself, roughly fifteen metres east to west and seven metres north to south, rewards close attention. The entrance in the south wall is a round-arched doorway with decorative carved cusps along the arch, and there is an inscribed stone set into the doorway reveal. The east gable holds an inwardly-splayed window, a design that widens inward to maximise light within the thick walls. Inside, a small opening called a squint is cut through the interior dividing wall of the western chamber, giving a sightline into the main body of the church, a practical feature that allowed someone in the side room to observe services without being present in the nave. A graveyard and a saint's stone are also associated with the site.