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.
Reformation in Ireland
Henry's son Edward VI of England (1547–53) formally established Protestantism as the state religion, which was as much a religious matter as his father's reformation had been political. His reign only lasted for six years and his principal reform, the Act of Uniformity 1549, had much less impact in Ireland than in England.