What makes it unusual is not simply its age but its layering: the building is two eras stitched together, and its interior holds an almost implausible concentration of early medieval stonework for something barely six metres long.

The structure, known locally as Teaghlach Éinne, meaning the household or family of Enda, was part of the monastery associated with St Enda, one of the most significant figures of the early Irish church. The east gable, with its projecting antae (the distinctive side walls that extend slightly beyond the end of a building, a characteristic feature of early Irish churches) and a round-headed window, along with most of the north wall, date to the early Christian period. The west and south walls, and a doorway in the north wall, were probably added or rebuilt in the seventeenth century, giving the structure its quietly hybrid character. Inside, the accumulated objects are remarkable: two bullauns, which are stone basins with cup-shaped hollows thought to have been used for grinding or ritual purposes; five cross slabs; an inscribed stone; three fragments of high crosses cemented together; and part of a high cross head. Each piece represents a different moment of early Christian devotion, preserved in a space that measures just under three metres wide. There is also a curiosity of absence: an Ordnance Survey six-inch map names a feature called St Eany's Grave within the site, but no physical trace of it has ever been identified on the ground.