This ringfort, with an internal diameter of 50 metres, features a modern curving stone wall that appears to follow the outline of the original single-ringed enclosure documented on the 2nd edition Ordnance Survey 6-inch map. The site’s circular defensive structure would have once protected a small farming community, typical of the thousands of ringforts that dotted the Irish landscape between the 6th and 12th centuries.

The cashel carries a particularly poignant history, as local historian M.R. Calhoun reports that a children’s burial ground, known as a cillín, is located in the vicinity and likely within the site itself. These unconsecrated burial grounds were traditionally used for unbaptised infants and small children, reflecting the complex intersection of Christian doctrine and folk tradition in rural Ireland. Such sites are scattered throughout the country, often occupying older archaeological monuments like ringforts, which were already considered liminal spaces in the landscape.

Archaeological documentation of the site comes from the comprehensive ‘Archaeological Survey of County Donegal’, compiled by Brian Lacey and his team in 1983. This survey catalogued field antiquities from the Mesolithic period through to the 17th century, providing crucial records of monuments that might otherwise be forgotten or destroyed. The cashel at Adderville represents just one entry in this extensive inventory, yet it encapsulates centuries of human occupation, from its original defensive function to its later, more sorrowful role as a burial place for the community’s youngest members.