That near-invisibility is part of what makes this kind of site worth attention. Early ecclesiastical enclosures, a term for the boundary earthworks that once defined the sacred and functional territory of an early Irish church, are common enough across Ireland, but they are rarely so quietly absorbed into the everyday landscape.

The enclosure at Ardoyne survives as an earth and stone bank measuring around 2.2 metres in width, standing only 0.4 metres high on the interior and between 0.6 and 1 metre on the exterior where it remains visible to the south of the road. The church at its centre is poorly preserved, placed roughly centrally within the graveyard the enclosure defines. The whole arrangement sits on level ground in gently undulating terrain, the kind of ordinary agricultural countryside that gives little away. The semicircular form of the enclosure is itself a telling detail; this curvilinear plan is associated with early medieval ecclesiastical settlements in Ireland, and its shape here, c. 20 metres north to south and c. 50 metres east to west, preserves the footprint of a community that organised its spiritual and perhaps its working life within this modest boundary.