Located on Oileán Dúiche in County Donegal, this small ecclesiastical site has remained largely inaccessible to modern archaeological surveyors, preserving its air of mystery and remoteness.

The church ruins themselves are remarkably diminutive, measuring just 15 feet by 10 feet according to a description from 1858. Its sole doorway faces south, standing 5 feet high with an unusual tapered design; 2 feet wide at the base, it narrows as it rises towards the top, a architectural feature that speaks to vernacular building traditions of early Irish churches. Such small dimensions suggest this was likely a simple oratory or chapel rather than a parish church, perhaps serving a small monastic community or acting as a pilgrimage site dedicated to St. Duach.

The site’s inaccessibility has meant that much of what we know comes from historical records rather than recent archaeological investigation. The Archaeological Survey of County Donegal, compiled in 1983, relied on these earlier accounts, including the 1858 Ulster Journal of Archaeology description, to document this intriguing remnant of Donegal’s ecclesiastical heritage. The combination of church and burial ground, typical of early Christian sites in Ireland, suggests continuous use over many centuries, though the exact dates of foundation and abandonment remain tantalizingly unclear.