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St Mary's College is a college of Durham University in England. Following the grant of a supplemental charter in 1895 allowing women to receive degrees of the university, St Mary's was founded as the Women's Hostel in 1899, adopting its present name in May 1920.

Grey College is a college of Durham University in England. Although it was originally planned for the college to be named Oliver Cromwell College, this proved too controversial and it was instead named after Charles Grey, 2nd Earl Grey, who was prime minister at the time of the university's foundation.

Trevelyan College (known colloquially as Trevs) is a college of Durham University, England. Founded in 1966, the college takes its name from social historian George Macaulay Trevelyan, Chancellor of the University from 1950 to 1957. Originally an all-female college (the last to open in England), the college became fully mixed in 1992.