From the Wikipedia page 
St Sepulchre was an ancient parish partly within the City of London and partly within Middlesex, England.
For civil purposes it was divided into two civil parishes, each called St Sepulchre, although the parish in the City of London was also known as St Sepulchre without Newgate. The boundary between the two parishes cut right though the Smithfield market.
The parish in the City of London was abolished in 1907. The parish outside the City of London became part of the Metropolitan Borough of Finsbury in 1900 and was abolished in 1915. The area is now split between the City of London and the London Borough of Islington.