The 13th-century church of St Leonard, Foster Lane, about north of St Paul's Cathedral on Foster Lane, was badly damaged in the 1666 Great Fire of London, and was not considered to be worth the cost of repair. Instead its parish was united with that of the nearby Christ Church Greyfriars, which was rebuilt after the fire to a design by Sir Christopher Wren; the incumbent from that time onwards has held the joint titles of Vicar of Christ Church Greyfriars and Rector of St Leonard, Foster Lane. Although destroyed in 1666, the ruins of St Leonard, Foster Lane, were not cleared until the early 19th century.