St Asaph was a disciple of Kentigern, whom we also meet in Glasgow. During the latter's exile in 545, he travelled to Cymru and established the Celtic monastery of Llanelwy (church by the River Elwy) which supported 965 monks. In 573, when Kentigern was called back to Strathclyde, he appointed Asaph as his successor. The present cathedral, the smallest in Britain, dates from the 1300's and has an interesting and often violent history. The North Wales Music Festival is staged here in September and the area is well worth a visit for it's nearby mountains and moors. For more on St Asaphs, read here.
Image source: wikipedia