London is the capital city of England and the United Kingdom, the largest metropolitan area in the United Kingdom and the largest urban zone in the European Union by most
measures. London has been a major settlement for two millennia, its history going back to its founding by the Romans, who called it
Londinium. London's ancient core, the City of London, largely retains its square-mile mediaeval boundaries. Since at least the 17th. century, the name London has also referred to the metropolis developed around this
core. The bulk of this conurbation forms the London region and the Greater London administrative area, governed by the elected Mayor of London and the London Assembly.
London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism and transport all contributing to its
prominence. London is the world's largest financial centre alongside New York,
London has the largest city GDP in Europe and London is home to the headquarters of more than 100 of Europe's 500 largest companies. It has the most international visitors of any city in the world. London Heathrow is the world's busiest airport by number of international
passengers. London's 43 universities form the largest concentration of higher education institutions in Europe.
London has a diverse range of peoples, cultures and religions, and more than 300 languages are spoken within its
boundaries. In July 2007 Londan had an official population of 7,556,900 within the boundaries of
London, making it the most populous municipality in the European Union. The Greater London Urban Area is the second largest in the EU with a population of 8,278,251, while London's metropolitan area is the largest in the EU with an estimated total population of between 12
million and 14 million.
London contains four World Heritage Sites: the Tower of
London; Kew Gardens; the site comprising the Palace of Westminster, Westminster Abbey and St Margaret's Church; and the historic settlement of Greenwich (in which the Royal Observatory marks the Prime Meridian (0° longitude) and
GMT). Other famous landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, 30 St Mary Axe ("The Gherkin"), St Paul's Cathedral, Tower Bridge and Trafalgar Square. London is home to numerous museums, galleries, libraries, sporting events and other cultural institutions including the British Museum, National Gallery, British Library, Wimbledon and 40
theatres. London's Chinatown is the largest in Europe. The London Underground network is the oldest underground railway network in the world and the most extensive after the Shanghai Metro