This is a timeline of Irish history, comprising important legal and territorial changes and political events in Ireland. To read about the background to these events, see History of Ireland. See also the list of Lords and Kings of Ireland, alongside Irish heads of state, and the list of years in Ireland. Prehistory / centuries: 1st2nd3rd4th5th6th7th8th9th10th11th12th13th14th15th16th17th18th19th20th21st Mesolithic and neolithic periods Bronze and Iron Ages 1st century 2nd century 3rd century 4th century 5th century 6th century 7th century 8th century 9th century 10th century 11th century 12th century 13th century 14th century 15th century 16th century 17th century 18th century 19th century 20th century 21st century References 01 01 Ireland