London is the capital and most populous city of England and the United Kingdom. Standing on the River Thames in the south east of Great Britain. London has been a major settlement for two millennia. It was founded by the Romans, who named it Londinium. London is a leading global city. In 2012, London became the first city to host the modern Summer Olympic Games three times. Some famous landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Paul's Cathedral, Tower Bridge, Trafalgar Square, and The Shard. London is home to numerous museums, galleries, libraries, sporting events and other cultural institutions, including the British Museum, National Gallery,Tate Modern, British Library and 40 West End theatres.