Saint Petroc was a 5th-century Welsh prince and monk who served the people of the Dumnonia kingdom, which included parts of modern Cornwall and Devon. After studying in Ireland, he established a significant monastery at Padstow, a location known as his place. He spent much of his ministry traveling through Britain and Brittany, eventually retiring to Bodmin. Recognized as a major figure among Cornish saints, he is remembered for his humility and his extensive work in establishing churches across the British Isles.