Kentigern

Kentigern, or St. Mungo, the son of a British or Culdee prince, is said to have been born somewhere N. of the Forth about 514. He received his education at the monastery of St. Serf, near Culross, and became a missionary preacher on the spot now occupied by Glasgow, where he became bishop. The jealousy of the local sovereign forced him into exile, and, settling in Wales, he founded the see of St. Asaph; but, being recalled about 560, he began the building of the cathedral, and ministered there until his death in 601.