Professor Ó Siochrú’s primary research focus is on seventeenth-century Irish political, constitutional, urban and military history, from the Ulster Plantation to the Jacobite Wars, situated in a broad European contextual framework. He was Principal Investigator on the 1641 Depositions project and the Down Survey of Ireland Project and is part of the editorial team which produced the new five-volume edition of Cromwell’s Letters and Papers for Oxford University Press. Professor Ó Siochrú is the author of numerous papers and books including
God’s Executioner: Oliver Cromwell and the conquest of Ireland (London: Faber & Faber, 2009) and Confederate Ireland, 1642-1649: A constitutional and political analysis (Dublin: Four Courts Press, 2008, 2nd edition).
