Colleges of Durham University mixed in 2005 with the admittance of male undergraduates. One college, Ustinov, admits only postgraduates. Durham operates a collegiate structure similar to that of the University of Oxford and the University of Cambridge, in that all colleges at Durham, being constituent colleges of a "recognised body", are "listed bodies" in the Education (Listed Bodies) (England) Order 2013 made under the Education Reform Act 1988. The "recognised body" in this case is Durham University. Though most of the Durham colleges are governed and owned directly by the University itself, and so do not enjoy the independence of colleges at Oxford and
Durham, England event in the world. During the 20th century the University expanded greatly. St John's College and St Cuthbert's Society were founded on the Bailey, completing the series of colleges in that area of the city. From the early 1950s to early 1970s the university expanded to the south of the city centre. Trevelyan, Van Mildert, Collingwood, and Grey colleges were established, and new buildings for St Aidan's and St Mary's colleges for women, formerly housed on the Bailey, were created. The final 20th century collegiate addition came from the merger of the independent nineteenth-century colleges of the Venerable Bede and