London is the capital city of England and the United Kingdom, with a population of over 14 million people. It was founded by the Romans in 40 AD and named Londinium. Some of London's most famous landmarks include Big Ben, Buckingham Palace, the Tower of London, Westminster Abbey, Hyde Park, and Trafalgar Square. London has a well-developed public transport system including the iconic red double decker buses and the Underground, known locally as the "Tube".