Christianity in Ireland has a rich history that dates back to the arrival of Saint Patrick in the 5th century. He is credited with converting many Irish people to Christianity and is now the patron saint of Ireland. Over the centuries, the faith evolved, leading to the establishment of various monastic communities and the spread of Catholicism and Protestantism. Today, Christianity remains a significant part of Irish culture, with approximately 78% of the population identifying as Christian. The Roman Catholic Church is the largest denomination, followed by the Church of Ireland, which is part of the Anglican Communion. Religious festivals and traditions continue to play an important role in Irish life.