The history of Trinity College, Oxford documents the 450 years from the foundation of Trinity – a collegiate member of the University of Oxford – on 8 March 1554/5. The fourteenth oldest surviving college, it reused and embellished the site of the former Durham College, Oxford. Opening its doors on 30 May 1555, its founder Sir Thomas Pope created it as a Catholic college teaching only theology. It has been co-educational since 1979.