London

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. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its founding by the Romans, who named it Londinium.

London's ancient core, the City of London, largely retains its square-mile mediaeval boundaries. Since at least the 19th century, the name London has also referred to the metropolis developed around this core.

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 has been described as a world cultural capital. It is the world's most visited city and has the world's largest city airport system measured by passenger traffic. London's 43 universities form the largest concentration of higher education in Europe. In 2012 London will become the first city to host the modern Summer Olympic Games three times.

London has a diverse range of peoples and cultures, and more than 300 languages are spoken within its boundaries. 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, St Paul's Cathedral, Tower Bridge, Trafalgar Square and Wembley Stadium. London is home to numerous museums, galleries, libraries, sporting events and other cultural institutions, including the British Museum, National Gallery, Tate Modern, British Library, Wimbledon, and 40 West End theatres.

The etymology of London is uncertain.  It is an ancient name and can be found in sources from the 2nd century. It is recorded c. 121 as Londinium, which points to Romano-British origin.

The administration of London is formed of two tiers—a city-wide, strategic tier and a local tier. London is the seat of the Government of the United Kingdom, which is located around the Palace of Westminster. Many government departments are located close to Parliament, particularly along Whitehall, including the Prime Minister's residence at 10 Downing Street.

Within London, both the City of London and the City of Westminster have city status and both the City of London and the remainder of Greater London are the ceremonial counties.

London has a temperate oceanic climate, similar to much of southern Britain.

London's buildings are too diverse to be characterised by any particular architectural style, partly due to their varying ages. Many grand houses and public buildings, such as the National Gallery, are constructed from Portland stone. Some areas of the city, particularly those just west of the centre, are characterised by white stucco or whitewashed buildings. Few structures in Central London pre-date the Great Fire of 1666, these being a few trace Roman remains, the Tower of London and a few scattered Tudor survivors in the City. Further out is, for example, the Tudor period Hampton Court Palace, England's oldest surviving Tudor palace, built by Cardinal Thomas Wolsey circa 1515.

The largest parks in the central area of London are the Royal Parks of Hyde Park, its neighbour Kensington Gardens at the western edge of central London and Regent's Park on the northern edge.

With increasing industrialisation, London's population grew rapidly throughout the 19th and early 20th centuries, and it was for some time in the late 19th and early 20th centuries the most populous city in the world until overtaken by New York in 1925. Its population peaked at 8,615,245 in 1939 immediately before the outbreak of the Second World War. There were an estimated 7,556,900 official residents in Greater London as of mid-2007. According to the Office for National Statistics, based on 2009 estimates, 69.7 per cent of the 7,753,600 inhabitants of London were White, with 59.5 per cent White British, 2.2 per cent White Irish and 8.0 per cent classified as Other White. Some 13.2 per cent are of South Asian descent, with Indians making up 6.2 per cent of London's population, followed by Pakistanis and Bangladeshis at 2.8 per cent and 2.2 per cent respectively. The majority of Londoners –  58.2 per cent – identify themselves as Christians. This is followed by those of no religion (15.8 per cent), Muslims (8.5 per cent), Hindus (4.1 per cent), Jews (2.1 per cent), Sikhs (1.5 per cent), Buddhists (0.8 per cent) and other (0.2 per cent), though 8.7 per cent of people did not answer this question in the 2001 Census.