Patricius, commonly known as Saint Patrick, was a 5th-century Christian missionary and the patron saint of Ireland. He is credited with bringing Christianity to the Irish people and is celebrated for his efforts in converting pagans to Christianity. His life and work are commemorated on Saint Patrick's Day, observed on March 17. Born in Roman Britain, Patricius was captured by Irish pirates at the age of sixteen and taken to Ireland as a slave. After six years, he escaped and returned home, later feeling called to return to Ireland as a missionary. His teachings and legacy have made him a significant figure in both religious and cultural history.