London two months. The fortifications failed their only test when the New Model Army entered London in 1647, and they were levelled by Parliament the same year. London was plagued by disease in the early 17th century, culminating in the Great Plague of 1665–1666, which killed up to 100,000 people, or a fifth of the population. The Great Fire of London broke out in 1666 in Pudding Lane in the city and quickly swept through the wooden buildings. Rebuilding took over ten years and was supervised by Robert Hooke as Surveyor of London. In 1708 Christopher Wren's masterpiece, St Paul's Cathedral
City of London sections near the Tower of London. The River Fleet was canalised after the Great Fire of 1666 and then in stages was bricked up and has been since the 18th century one of London's "lost rivers or streams", today underground as a storm drain. The boundary of the City was unchanged until minor boundary changes on 1 April 1994, when it expanded slightly to the west, north and east, taking small parcels of land from the London Boroughs of Westminster, Camden, Islington, Hackney and Tower Hamlets. The main purpose of these changes was to tidy up the boundary where it