Christs Hospital , Corporation of London x Greyfriars

Greyfriars Franciscan monastery was situated in Farringdon on Newgate Street. It was suppressed during the dissolution of the monasteries in 1538 and given to the Lord Mayor and citizens of London in December 1547. It was decided by Edward VI to convert the monastery into an orphanage and school for poor children. By November 1552 the building was ready and 340 fatherless children were admitted (at this date a child was considered orphaned if the father had died, even if the mother was still alive). In the early years of the school, those too young to receive full-time education were "put out to nurse" in the country, usually in Essex or Hertfordshire, or else remained with their parents, who received a weekly allowance.

The school became known as the 'Blue Coat School' because the children were required to wear a uniform of blue gown, red belt and yellow stockings. In 1553 a Charter was signed to confirm the transformation of Greyfriars into Christ's Hospital; a hospital in the older sense of 'a charitable institution for the housing and maintenance of the needy' (Oxford English Dictionary).

Branches of the school existed at Hertford from at least 1653, at Hoddesdon, Hertfordshire, from 1666 to circa 1690, and at Ware, Hertfordshire, from about the same period until 1760. From 1778 the Hertford premises were used as the girls' school and as a preparatory school for boys.

The Royal Mathematical School, founded in 1673, was an integral part of Christ's Hospital, from which its pupils, all boys, were chosen at the age of 11 or 12. They were educated in mathematics and navigation, and were intended for service in the Royal Navy.

Christ's Hospital moved from the City of London to Horsham in 1902, and at the same time the boys' preparatory school also moved from Hertford to Horsham. The girls' school remained at Hertford until 1985, when it also moved to Horsham.