Bullauns are boulders or slabs with one or more deliberately carved basins, associated with early Christian sites across Ireland and often linked to ritual or practical use. This particular example is unremarkable in size, roughly 73 centimetres long, but what makes it curious is a second feature: an indented rectangular line etched into its upper surface beside the basin, its purpose now entirely unknown.

The name Toome most likely derives from the Irish "Tuaim", meaning a mound or tumulus, a connection noted by the scholar John O'Donovan around 1840. That etymology hints at the site's layered past. It is thought to occupy the ground of an early monastery, though no founding saint has been attached to it. By 1615, when Thomas Ram, the Protestant bishop of Ferns, carried out a formal visitation, the church was functioning in its post-Reformation guise, with a priest named John Alcock and a curate named John Lacy in post, and both the nave and chancel recorded as being in good repair. What stands now is considerably less intact. Three walls of the nave survive to roof height, but the chancel has collapsed entirely and reads only as a sunken depression in the ground, its pointed arch reduced to a fragment of undressed stone at the top.

The most extraordinary dimension of the site is invisible at ground level. The graveyard and church sit within a subrectangular earthen enclosure, but beyond that lie two concentric oval enclosures, an inner one roughly 80 metres across and an outer one stretching approximately 180 metres, both detectable only as cropmarks visible from aerial imagery. These are the kind of features, fosses or filled ditches whose outlines surface in dry summers when grass above them grows differently, that betray the full extent of what was once a significant ecclesiastical complex. The outer enclosure overlaps with the cropmark of a nearby rath, a type of circular earthwork farmstead, at its north-eastern edge, suggesting centuries of activity folding together across this low Wexford ridge.