These distinctive stones, featuring one or more cup-shaped hollows carved into their surface, can be found scattered across the Irish countryside, often near holy wells, church sites, and ancient monastic settlements. The Magherasollus example represents just one of hundreds documented throughout Ireland, each carrying centuries of folklore and religious tradition within its weathered basin.

Bullaun stones served multiple purposes in medieval Irish communities, though their exact origins remain somewhat mysterious. The hollows, typically ground out using harder stones, were likely used for grinding grain or herbs, particularly for medicinal preparations in monastic settings. Over time, many became associated with healing rituals and folk cures; rainwater collected in the depressions was believed to possess curative properties, especially for warts and other ailments. Some communities turned their bullauns clockwise whilst making wishes or seeking divine intervention, a practice that continued well into the modern era.