What makes the arrangement particularly curious is not simply the building itself, but its relationship to the enclosure around it. The structure sits eccentrically within the circle rather than at its centre, which is a detail that rewards attention. Ecclesiastical enclosures of this type, roughly circular boundaries that defined the sacred precinct of an early Christian site, are found across Ireland, but they are not always easy to read in the landscape, particularly where modern development has obscured or eroded them.

The enclosure here measures approximately 28 metres in diameter and is defined by a flat-topped bank roughly 6 metres wide and 0.6 metres high. That low, wide profile is characteristic of early medieval ecclesiastical boundaries, which were less about defence than about marking off consecrated ground from the secular world around it. The bank is best preserved on the eastern side of the church. Significantly, the 1937 edition of the Ordnance Survey six-inch map records a curved boundary to the west of the building as well, which is thought to represent a continuation of the same enclosure, suggesting the full circuit was once more complete than what survives on the ground today. The site was compiled by Geraldine Stout and updated by Christine Baker as part of the Archaeological Survey of Ireland record.

The earthwork is subtle enough that a visitor unfamiliar with what to look for could easily pass it without registering it at all. The eastern bank is the most legible section, so that is the best place to get a sense of the original boundary. Comparing what is visible on the ground against older mapping, particularly that 1937 OS edition, helps fill in the gaps where the enclosure has been reduced or built over. The building itself is recorded separately in the archaeological inventory under the reference DU015-031002, so cross-referencing both entries gives a fuller picture of how the two elements relate to each other within what was once a coherent, bounded, early Christian site.