What remains of this possibly late-medieval parish church in Carbury, County Kildare, is essentially a single wall, yet that wall has accumulated several centuries of additions, amendments, and family memory in a way that makes it quietly hard to read. The west gable, roughly eight metres long and nearly a metre thick, is built of well-dressed, coursed limestone blocks beneath a heavy render that gives the stonework an oddly sealed, almost concrete appearance. The original doorway is still legible, its ingoings gently splaying outward, though the top has been removed, so the opening runs directly up into a round-arched window above it, the two elements now sharing a single unbroken void. Above that, a small round-arched bellcote sits on the gable apex, built of ashlar, the finely cut squared stone that distinguishes it from the wall below, and likely added at a later date than the main structure.

The Colley family, who were closely associated with Carbury Castle some eighty metres to the north, left a strong imprint on what survived. A plaque dated 1705 commemorating Colley family members is mounted on the inner face of the gable wall, just south of the doorway. At the east end of the roofless shell, where the rest of the church once stood, a large 18th-century mausoleum now occupies the space, containing two further plaques also dedicated to the family. The Colleys were an Anglo-Irish dynasty of some consequence in this part of Kildare, and the accumulation of commemorative stonework here, spanning from the early 18th century into the mausoleum's construction, gives the ruin the character of a family monument as much as a parish church. Immediately inside the west gable, a rectangular grave plot enclosed by iron railings, around eight metres by nearly six, reinforces that sense of proprietary continuity across the generations.