What sets this site apart is the layered uncertainty beneath it: the walls enclose a graveyard where some stones predate any surviving record of the building's post-medieval use, and the whole complex may itself sit within a far older ecclesiastical enclosure whose boundaries nobody has yet been able to confirm. The church, a single undivided cell of roughly coursed sandstone rubble measuring roughly 18 metres east to west, still stands to a height of around 4.5 metres on three sides, though much of the north wall has collapsed to little more than ankle height. Details survive inside that reward a careful look: a small aumbry, a recess built into the wall to hold sacred vessels, sits near the east end of the south wall, with a second cupboard directly below it now blocked by a nineteenth-century table-tomb. An offset on the inner face of the west gable, together with beam-holes in the north wall, suggests that a floor or gallery once occupied the western end of the building, a detail that complicates any simple reading of the space.

The site was founded by Augustinian canons in the twelfth or thirteenth century, and by 1568 it was recorded in a Royal Inquisition as the rectory of Twomahone. When John O'Donovan documented it for the Ordnance Survey Name Books in 1840, the building was still considered well preserved, with lancet windows in the pointed gothic style and two quadrangular windows in the east gable. The doorway visible today in the south wall is not the original; it is a later insertion, though it retains cut-stone voussoirs, the wedge-shaped stones that form an arch, and a higher round-headed rear-arch on the interior. An aerial photograph taken in 1973 revealed a large curving earthwork running to the north, east, and south-east of the church and graveyard, suggesting the whole complex was once enclosed within a formal ecclesiastical boundary. Whether that earthwork ever completed a full circuit remains unresolved. The rocky, terraced ground to the south and west appears to have been quarried out at some point, and it is also possible the earthwork followed the line of a medieval roadway rather than forming a closed enclosure.

The graveyard contains roughly cut tombstones from the mid-eighteenth century alongside later headstones, and there are several gravestones inside the church itself, one dated 1779. The ivy that now covers much of the stonework obscures features that would otherwise be legible, including a possible window embrasure in the west gable at first-floor level and the more northerly of the two window embrasures in the east wall. The terrain around the site is undulating rough pasture with considerable rock outcrop, which makes the setting feel genuinely remote even though the ruin itself is not large.