Lackabaun, whose name derives from the Irish "leaca bán", meaning white hillside or flagstone, is a quiet rural townland, and the presence of a church ruin there points to a history of local devotion and community that predates the modern parish structure by centuries. Ruined churches of this kind are scattered across Connacht, often the remnants of medieval or early post-medieval worship, sometimes built over even older foundations, sometimes associated with a local saint or a pattern day that continued long after the building itself fell out of use.