Religion in the Republic of Ireland
The predominant religion in the Republic of Ireland is Christianity, with the largest church being the Roman Catholic Church. The Irish constitution says that the state may not endorse any particular religion and guarantees freedom of religion.
Holy See–Ireland relations
Holy See–Ireland relations are foreign relations between the Holy See and Ireland. The majority of Irish people claim to be Roman Catholic, and indicate this on the census form. However, views on actual church dogma both on social and spiritual matters varies significantly, and weekly mass attendance is below 40%. The Holy See has an Apostolic Nunciature in Dublin.