Ardmore (Irish for “the great height”) is a very ancient Christian site—St. Declan, its founder, is said to have been a bishop in Munster as early as the mid–4th century, well before St. Patrick came to Ireland. Tradition has it that the small stone oratory in a cemetery high above Ardmore marks his burial site. St. Declan’s Oratory is one of several stone structures composing the ancient monastic settlement. The most striking is the perfectly intact 30m-high (98-ft.) round tower. On site are also ruins of a medieval cathedral and, nearby, St. Declan's well and church. Ardmore is near the border with County Cork, about 70km (43 miles) southwest of Waterford City.