Tucked at the foot of a rocky scarp on the Aran Islands, this small rectangular building raises more questions than it answers, and the uncertainty surrounding its purpose is rather the point.

The structure sits roughly 270 metres south-south-west of Teampull Mac Duach, a genuine ecclesiastical site, which may partly explain how the church association crept into the name. The building measures 6.4 metres by 2.9 metres and is oriented north-east to south-west. Two of its sides are not walls at all but the natural rock face of the scarp, with drystone wall foundations defining only the north-east and south-east sides. Drystone construction, using carefully fitted stones without mortar, is the dominant building technique across the Aran Islands, so the method alone tells us little. No architectural features survive, meaning there are no doorways, windows, or dressed stonework that might point towards a religious or domestic function. Adjoining the structure on the south-east is a small rectilinear enclosure, roughly 11 metres by at least 7.5 metres, defined by a low grassy bank. Barry noted the site as far back as 1886, and Tim Robinson, whose meticulous mapping of the Aran Islands produced some of the most detailed records of its landscapes, also documented it in 1980. Despite this long paper trail, the question of what the building actually was remains open. Scholars working from the published archaeological inventory have considered and then set aside the church interpretation, leaving it listed simply as a building, a designation that is itself a kind of archaeological shrug.