Known as Aughnish Isle, this sacred site likely dates back to at least the 12th or 13th century, making it one of the area’s earliest religious centres. Today, visitors to the island will find no visible trace of these ancient structures; the church and its accompanying graveyard have completely vanished from the landscape.

The church’s demise came in the early 17th century when it was replaced by a newer building constructed in nearby Ramelton town. This shift reflects broader changes in settlement patterns and religious practices during this period of Irish history. Before its abandonment, the island church would have been accessible at low tide, serving the spiritual needs of medieval communities around Lough Swilly’s shores.

Though the physical structures have disappeared, one tantalising fragment of the old church survived its demolition. A small, carved window head was reportedly removed from the island and relocated to Ramelton, as noted by antiquarian G.H. Kinahan in the 1880s. This architectural detail, catalogued as DG037-021002, represents the last tangible link to a place of worship that once drew pilgrims and parishioners across the tidal waters for perhaps five hundred years.