This hollow, roughly thirty centimetres across and fifteen centimetres deep, is the defining feature of what is known as a bullaun stone: a type of ancient worked rock found at many early Christian and pre-Christian sites across Ireland. The basins were ground or pecked into the stone by hand, and while their exact purpose remains debated, they are most commonly associated with ritual or devotional use, collecting rainwater that was sometimes believed to carry curative properties.

This particular stone lies just to the south-east of the Leitrim ecclesiastical enclosure in Co. Wicklow, a site that preserves traces of early medieval religious activity. The proximity of bullaun stones to such enclosures is a pattern repeated across the country, suggesting these boulders were deliberately positioned, or at least deliberately retained, within the sacred landscape surrounding early church sites. The Leitrim example is earthfast, meaning the boulder is set into the ground rather than resting freely on the surface, which is typical and helps explain how many such stones have survived undisturbed for centuries. Its single basin measures approximately 0.3 metres by 0.28 metres, with a depth of around 0.15 metres, making it a modest but well-defined example of the type.