commemorated July 24
“If thou hast the right, O Erin, to a champion of battle to aid thee thou hast the head of a hundred thousand, Declan of Ardmore” (Martyrology of Oengus).
First bishop of Ardmore in Ireland was baptized by St. Colman, and preached the faith in that country a little before the arrival of St. Patrick, who confirmed the episcopal see of Ardmore, in a synod at Cashel in 448. Many miracles are ascribed to St. Declan, and he has ever been much honored in the viscounty of Dessee, anciently Nandesi.
read his entire vita at CCEL: Betha Decclain