abstract:James Ussher (sometimes spelled Usher, 4 January 1581 – 21 March 1656) was Church of Ireland Archbishop of Armagh and Primate of All Ireland between 1625 and 1656. He was a prolific scholar, who most famously published a chronology that purported to establish the time and date of the creation as the night preceding Sunday, 23 October 4004 BC, according to the proleptic Julian calendar.