St. Patrick was born in the 4th century, to parents who were the deacons of the Church. He was kidnapped as a teenager by Irish raiders and made a slave.
He claims that he was visited by God in a dream, who told him to run away from captivity and head towards the coast, where he would find a ship that would take him back to Britain. He later joined the church and became a priest.
Many years later he was called back to Ireland once he had become a Bishop, to convert the Irish people from their native beliefs of polytheism to Christianity.