The arrangement is quietly arresting: a medieval structure repurposed by the dead, itself contained within a prehistoric earthwork that long predates it.

A rath is a circular or oval enclosure defined by an earthen bank and ditch, typically associated with early medieval settlement in Ireland. Here, the chapel was built within the south-western quadrant of one such enclosure, and whoever constructed it made practical use of the rath's existing bank, setting the south-western gable directly into the earthwork. That gable, rising to a maximum height of two metres, is now the best-preserved wall standing. The chapel is modest in scale, measuring roughly 9.2 metres on its longer axis and just over four metres across, with walls only about 40 centimetres thick. Beyond a doorway in the north-eastern gable, no decorative or architectural features have survived, and the structure is described as very poorly preserved. What is striking is the layering: a prehistoric enclosure, a medieval chapel built partly against it, and then a modern vault introduced into the interior, each phase pressing into the space left by the last.