Patrick was born in Scotland in the year 387. At age 16 he was captured by pirates and was sold as a slave to the chief of Ireland. He was made to tend sheep in the mountains where he prayed much.
After six years. a voice from heaven told him to go back to his own country and St. Patrick escaped. But first he went to Rome where he became a priest. He was then assigned to to England, but was later sent to Ireland after begging the Pope. The Pope made him Bishop of Ireland and sent him as a missionary.
After going back to Ireland one of the pagan kings arrested St. Patrick. After seeing miracles worked through Patrick he asked Patrick to tell him about his God. Patrick answered him telling him that there was only one God in three persons: Father, Son, & Holy Spirit. He explained himself further by picking up a shamrock showing the 3 leaves but one stem. He was able to convert the pagan king and was allowed to preach the Faith everywhere in Ireland. St. Patricks converts became missionaries that later brought the Christian Faith to many pagan parts of Europe.