The head of government, or prime minister, of Ireland is known as the Taoiseach and heads a cabinet called the Government. However, since 1919, heads of government in the Irish state have borne a number of titles. Under the short-lived Irish Republic of 1919–22 the head of government was known first as the President of Dáil Éireann and later as the President of the Republic. Under the Irish Free State of 1922–37 the head of government was the President of the Executive Council. There also briefly existed, immediately before the creation of the Irish Free State, an interim office of Chairman of the Provisional Government. For a brief period in 1921 the offices of President of the Republic and Chairman of the Provisional Government existed simultaneously.