The surviving walls, built from rubble stone with small pinnings, give us glimpses into its original form: the church measured roughly 13 metres by 5.5 metres internally, with thick walls pierced by deeply splayed windows. The east gable preserves evidence of an intriguing architectural change; a smaller, earlier window was partially blocked when a larger central window was inserted, suggesting the church underwent modifications during its active life. Fire damage on the interior south wall and the presence of relieving arches above doorways hint at both destruction and careful medieval construction techniques.

The graveyard itself contains several remarkable early features that speak to the site’s long religious significance. Most prominent is an undecorated high cross, carved from a single stone slab standing 2.5 metres tall, with distinctive hollowed angles where the shaft meets the arms and small knob projections at these junctions. Near the church’s southwest corner lies a particularly fascinating stone bearing twenty-three cup marks; circular depressions about 6 centimetres wide and 1.5 centimetres deep that may date to prehistoric times. A standing stone, three-quarters of a metre high, once supported the legendary ‘wishing stone of Mevagh’, though this smaller stone has since disappeared.

The church occupies an elevated position on rocky ground, with cultivated fields dropping steeply eastward towards Mulroy Bay. This commanding location, combined with the variety of monuments from different periods, suggests Mevagh served as a sacred site for centuries, possibly even before Christianity arrived in Ireland. The medieval church ruins, the high cross, and the cup-marked stone together create a palimpsest of religious practice, each layer adding to our understanding of how communities in Donegal marked and maintained their sacred spaces through time.