Tipperary Mid West Radio Dubliners watch on from across the Liffey as the Custom House burns after the IRA attack in May 1921. Photo: Bettmann/Getty Images @RTE.ie As part of the Government’s Decade of Centenaries, the Department of Housing, Local Government and Heritage will today mark the Burning of the Custom House. It will hold a remembrance event, held in conjunction with relatives of both those who took part in the attack and civilians who were killed in the attack. One hundred years ago today, at 12.55pm on 25 May 1921, the IRA seized the Custom House, Dublin. In what was the IRA’s largest single operation during the War of Independence, it then set fire to the building. Nine people – five IRA members and four civilians – were killed in the gun-battles, which took place in and around the building.