St Mary de Crypt Church, Southgate Street, Gloucester, is an Anglican[1] Church, which was first recorded in 1140 as The Church of the Blessed Mary within Southgate. It is in the Diocese of Gloucester and is located adjacent to the ruins of Greyfriars. It has also been known as Christ Church and St. Mary in the South.[2] St Mary de Crypt is a Grade I listed building.[3]