 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 St Hild, which joined the university in 1979 as the College of St Hild and St Bede.The 1960s and 70s also saw building on New Elvet.