St Magnus the Martyr, London Bridge is a Church of England church and parish within the City of London. The church, which is located in Lower Thames Street near The Monument to the Great Fire of London, is part of the Diocese of London and under the pastoral care of the Bishop of Fulham. It is a Grade I listed building. The rector uses the title "Cardinal Rector" and, since the abolition of the College of Minor Canons of St Paul's Cathedral in 2016, is the only cleric in the Church of England to use the title Cardinal.