St. Mary's Diocesan School for Girls is a South African Anglican private boarding school for girls located in Hillcrest, Pretoria, Gauteng. St Mary's DSG was founded in 1879 by the Rt Revd Henry Bousfield, the first Bishop of Pretoria.  For 75 years of its existence the school was run by the nuns of the Community of St Mary the Virgin. St Mary's DSG has a deep sense of tradition and core of values. locally and from many countries in Africa and abroad.