Seán T. O'Kelly, Irish politician, 2nd President of Ireland (born 1882)

Seán Thomas O'Kelly, originally John T. O'Kelly, was an Irish Fianna Fáil politician who served as the second president of Ireland from June 1945 to June 1959. He also served as deputy prime minister of Ireland from 1932 to 1945, Minister for Local Government and Public Health from 1932 to 1939, Minister for Finance from 1939 to 1945 and Ceann Comhairle of Dáil Éireann from 1919 to 1921. He was a Teachta Dála (TD) from 1918 to 1945.

The president of Ireland is the head of state of Ireland and the supreme commander of the Irish Defence Forces. The presidency is a predominantly ceremonial institution, serving as the representative of the Irish state both at home and abroad. Nevertheless, the office of president is endowed with certain reserve powers which have constitutional importance. When invoking these powers, the president acts as the guardian of the Irish constitution. This representative and moderating role is in keeping with the president's solemn oath to "...maintain the Constitution of Ireland and uphold its laws..", to "...fulfil my duties faithfully and conscientiously in accordance with the Constitution and the law...", and to "...dedicate my abilities to the service and welfare of the people of Ireland." The president's official residence and principal workplace is Áras an Uachtaráin in Phoenix Park, Dublin.