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.
National symbols of Ireland, the Republic of Ireland and Northern Ireland
The flag of Ireland is a tricolour of green, white and orange, first flown in 1848. The colours stand for Irish Catholicism, Irish Protestantism, and peace between the two.