He became renowned as a teacher and preacher, founding monastic settlements and churches in Wales, Dumnonia and Brittany in a period when neighbouring tribal regions (that were to be overrun by Anglo-Saxon or Frankish tribes over the following three hundred years) were still mostly pagan

St. David Cathedral in Pembrokeshire

The best-known miracle associated with Saint David is said to have taken place when he was preaching in the middle of a large crowd at the Synod of Llanddewi Brefi. When those at the back complained that they could not see or hear him, the ground on which he stood is reputed to have risen up to form a small hill so that everyone had a good view. A white dove was seen settling on his shouldera sign of God's grace and blessing.

It is claimed that David lived for over 100 years, and he died on a Tuesday 1 March (now St David's Day)