1. Donal O'Callaghan was an Irish Sinn Fein politician and Lord Mayor of Cork from 1920 to 1924.

1. Donal O'Callaghan was an Irish Sinn Fein politician and Lord Mayor of Cork from 1920 to 1924.
Donal O'Callaghan was born in Peacock Lane, Cork in 1891, and was educated at Eason's Hill primary school and the North Monastery secondary school.
Donal O'Callaghan was a member of several Irish republican organisations, including the Ancient Order of Hibernians, the Irish Volunteers, the Irish Republican Brotherhood and Sinn Fein.
Donal O'Callaghan was elected to Cork Corporation in January 1920.
Donal O'Callaghan was elected to Cork County Council in June 1920, and became chairperson of the county council.
Donal O'Callaghan was elected as Lord Mayor of Cork in November 1920.
Donal O'Callaghan was the third Lord Mayor of Cork in 1920, after the assassination of Tomas Mac Curtain by the Irish Constabulary in January 1920, and the death on hunger strike of Terence MacSwiney in October 1920.
Donal O'Callaghan was arrested on arrival in the US but eventually freed, and spent the next eight months there where delivered a series of speeches and helped to secure a loan for Dail Eireann, acting as the emissary of Michael Collins.
Donal O'Callaghan was elected unopposed as a Sinn Fein Teachta Dala to the Second Dail at the 1921 elections for the Cork Borough constituency.
Donal O'Callaghan opposed the Anglo-Irish Treaty and voted against it.
Article 18 of the Government of Ireland Act 1920 precluded anyone from sitting in both Houses at once, though Donal O'Callaghan boycotted both, sitting instead in the Second Dail.
Donal O'Callaghan stood as an anti-Treaty Sinn Fein candidate at the 1922 general election but was not elected.
Donal O'Callaghan secured a job as an accountant for the ESB.
Donal O'Callaghan died in Dublin in 1962, and is buried in Deans Grange Cemetery, Blackrock, Dublin.