Postman's Park is a public garden in central London, a short distance north of St Paul's Cathedral. Bordered by Little Britain, Aldersgate Street, St. Martin's Le Grand, King Edward Street, and the site of the former headquarters of the General Post Office, it is one of the largest open spaces in the City of London, the walled city which gives its name to modern London.Postman's Park opened in 1880 on the site of the former churchyard and burial ground of St Botolph's Aldersgate church and expanded over the next 20 years to incorporate the adjacent burial grounds of Christ Church Greyfriars and St Leonard, Foster Lane, together with the site of housing demolished during the widening of Little Britain in 1880; the ownership of the last location became the subject of a lengthy dispute between the church authorities, the General Post Office, the Treasury, and the City Parochial Foundation.