Yet at Kilboy, set on a low natural rise amid gently rolling countryside, the remains of a medieval church carry exactly that detail: a compact tower-like structure that served as a priest's room, its doorway now largely destroyed, tucked against the western gable as though an afterthought to the main building.

The church itself is a long rectangular structure, to which a south transept was added at a later period, grafted onto the eastern end of the south wall. The building retains several architectural features that speak to different phases of construction and use. At the west end of the north wall, a two-centred doorway survives, the pointed arch form common in later medieval Irish ecclesiastical work. Further along the north wall, a partially destroyed window hints at an earlier arrangement of light and interior space, while cusped windows at the eastern ends of both the north and south walls belong to a later embellishment, their decorative tracery a sign that someone, at some point, thought the building worth improving. Surrounding all of this is a large rectangular graveyard, its headstones dating predominantly from the eighteenth and nineteenth centuries, suggesting the site remained in active use as a burial ground long after the church itself fell out of regular service. An aerial photograph taken in 1969 revealed earthworks to the north, north-east, and east of the church that may represent the traces of an early field system, a reminder that ecclesiastical sites rarely existed in isolation from the agricultural and social landscapes around them.