The principal founder of the school was
John Chadworth (d. 1471),
Bishop of Lincoln. He is recorded in
Lincoln Cathedral as a "Gloucester Man". He was educated at Oxford and was afterwards a Fellow and
Provost of King's College, Cambridge. The school moved into new buildings in Victoria Road, Cirencester, in 1881.
Princess Alexandra of Kent visited the school on 23 July 1958 as part of its quincentenary celebrations.
Closure The school finally closed in July 1966, at the end of the summer term, as part of a reorganisation of county schools. In September 1966 its
forms became part of the
Cirencester School, combining with pupils from the
Deer Park Secondary Modern School, and the new First Form entrants for 1966 went directly to the Deer Park site. Eventually the old Cirencester Grammar School forms all moved there, also. The School's Victoria Road buildings still survive much as they were in 1966. They were taken over by a junior school (previously in Lewis Lane), which was subsequently joined by a primary school. The junior school closed in July 2010 ==Notable former pupils==