A bullaun is a large rock, usually a glacial boulder or a slab of local stone, into which one or more rounded depressions have been deliberately carved. The hollows hold rainwater, and for centuries, possibly millennia, people have associated that water with healing and with cursing, with the turning of the stone and the speaking of intentions. They are among the most ambiguous objects in the Irish landscape, neither fully pagan nor fully Christian in the way they have been used, and they tend to accumulate folklore long after their original purpose has been forgotten.

Bullaun stones are found across Ireland and are generally thought to date from the early medieval period, though some may be considerably older. They are frequently found in association with early church sites and holy wells, suggesting that their use was absorbed into Christian practice rather than suppressed. The Rathinure example sits within a part of Kilkenny that retains a scatter of early ecclesiastical remains, a county whose interior contains more of these quiet survivals than its better-known medieval architecture sometimes allows visitors to notice. Beyond its location and its classification as a recorded monument, the specific history of this particular stone, its dimensions, any associated traditions, and the precise context of its setting, remains to be fully documented in the public record.