About Donal O'Callaghan:
Daniel (Donal) O'Callaghan was an Irish Sinn Féin politician. He was elected unopposed as a Sinn Féin Teachta Dála (TD) to the 2nd Dáil at the 1921 elections for the Cork Borough constituency. He opposed the Anglo-Irish Treaty and voted against it. He stood as an anti-Treaty Sinn Féin candidate at the 1922 general election but was not elected. He served as Lord Mayor of Cork from 1920 to 1923.