The predominant religion in Ireland is Christianity, with the largest church being the Roman Catholic Church. Ireland's constitution states that the state may not endorse any particular religion and guarantees freedom of religion.
Ireland is a parliamentary, representative democratic republic and a member state of the European Union. While the head of state is the popularly elected President of Ireland, this is a largely ceremonial position with real political power being vested in the indirectly elected Taoiseach (prime minister) who is the head of the government.
Northern Ireland and the Republic of Ireland have different currencies.
In the Republic of Ireland the currency used is the Euro and in Northern Ireland the currency used is the Pound Sterling.