It is traditionally believed that a monastic settlement was founded here in the fifth century by St. Patrick who installed Dabheoc as the first abbot. There are forty-six islands in Lough Derg but only two of them are of archaeological interest. The…
"The ground-works of many ruins can still be traced to Saint Daveog's Island on Olean na Naomh or Island of the Saints) and a paved way (via strata) or old road can still be traced..."
