Durham University there is no formal teaching at Durham colleges (with the exception of Cranmer Hall theological college within St John's), although colleges are active in research. The colleges dominate the residential, social, sporting, and pastoral functions within the university, and there is heavy student involvement in their operation. Formal dinners (known as "formals") are held at every college; gowns are worn to these events at just over half of the colleges. Gowns are not worn for formals at Collingwood, St Aidan's, St Cuthbert's, Hild Bede, Van Mildert, Stephenson or Ustinov. There is a great deal of intercollegiate rivalry, particularly in rowing
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