Trinity College Dublin, formally known as the College of the Holy and Undivided Trinity of Queen Elizabeth near Dublin, is founded in 1592 by letters patent from Queen Elizabeth I as the "mother of a university", and is today the only constituent college of the University of Dublin.

Located in Dublin, it is Ireland's oldest university.

Originally established outside the city walls of Dublin in the buildings of the dissolved Augustinian monastery of All Hallows, Trinity is set up partly to consolidate the rule of the Tudor monarchy in Ireland.