What makes this unremarkable at first glance is precisely what makes it worth a second look: the stone almost certainly began its life as a bullaun, and the oval basin hollowed into its face, roughly 36cm by 25cm and about 10cm deep, was not carved for Christian liturgical purposes. Bullaun stones are ancient rocks bearing one or more cup-shaped depressions, found widely across Ireland and most often associated with early ecclesiastical sites. Their original function remains debated, but theories range from grinding or pounding implements to ritual water vessels connected with healing or cursing traditions. Here, the basin has simply been pressed into a new role, holding holy water in a church rather than whatever it once held outside one.

A plaque fixed to the wall beside the stone explains its journey. It was brought, along with an architectural fragment, from an old church site that stood across the road to the north. The place name Ceathrú An Teampaill, which translates roughly as the quarter of the church, points to the deep association between this townland and ecclesiastical use stretching back well before the present building. The stone itself cannot be fully measured because of how it is set into the wall, though the visible portions indicate it is at least 0.6m long, 0.55m wide, and 0.29m high. Its material, conglomerate granite, is consistent with the kind of durable, locally sourced rock used at early Irish church sites throughout Connacht.