The Taoiseach is the head of the Government of Ireland. Under Article 13 of the Constitution of Ireland, the Taoiseach is appointed by the President of Ireland on the nomination of Dáil Éireann, the lower house of the Oireachtas. The Taoiseach must be a member of Dáil Éireann. Prior to 6 December 1922, during the period of the Irish Republic, the head of government was the President of Dáil Éireann who was elected by Dáil Éireann. A breakdown of votes is on the pages of governments formed, while support for unsuccessful candidates is noted below.