Knightrider Street is a street in the City of London, located a short distance to the south of St Paul's Cathedral. It was originally the site of the German Church built in 1666–5 and demolished in 1867 to make way for Queen Victoria Street and the District line of the London Underground; the Doctors' Commons, also demolished in 1867 for the same reason; and the church of St Mary Magdelen, demolished in 1866 after being badly damaged in a fire. At No. 5, the physician Thomas Linacre founded the Royal College of Physicians.