St David is the patron saint of Wales, whose saint's day is celebrated annually on 1 March.
St David (or 'Dewi Sant' in Welsh) was born on the south west coast of Wales, near the present day city of St Davids. His family was aristocratic. He was educated at a monastery and became a missionary, travelling through Wales and to south west England and Brittany to spread Christianity. He is also supposed to have visited Rome and Jerusalem.
David founded a monastery where St Davids stands today. He died in 589 AD and was buried in the grounds of his own monastery. He has been the patron saint of Wales since the 12th century.