London is the capital and largest city in England and the UK. Located on the banks of the river Thames, it's an important human settlement since the Roman foundation under the name of Londinium over 2000 years ago. The old city center still its square mile medieval perimeter. Since the 19th Century, the name "London" also refers to the whole metropolis that surrounds the Capital. 4 important icons have been declared Heritage of Humanity: The Tower of London, The Royal Botanic Gardens, The Westminster Abbey, St Margaret's Church and Greenwich, the location of the Royal Observatory that marks the Prime Meridian Line.