Seeking a place to live out the religious life, Tudno went to the great ancient limestone outcrop of the Great Orme (Cyngreawdr), jutting from the Creuddyn Peninsula, to bring the message of Christianity to its people. He lived initially as a hermit in a small coastal cave with difficult access known as Ogof Llech, which provided protection from the elements, and a source of fresh water from a spring well Fynnon Llech. From this base he constructed a church. Nothing remains of this 6th century church building, although the present 12th century church, dedicated to St Tudno, stands on the same site, and has a continuous history.