London is the capital of England and the United Kingdom and is the second largest city in Europe after Moscow. It includes both the City of London (the Square Mile) and Greater London. London will be the host city of the 2012 Olympic Games, having previously hosted the games in 1908 and 1948. It will become the only city to host the games three times.
Archaeologists have found evidence that the area that would become London had been populated since the Ice Age, the broad Thames Valley with its shallow river, lush meadows and broad-leafed woodlands providing an ideal location in which early farmers settled.
Julius Caesar reported in 54 B.C. that, when passing through the area to engage Cassivellaunus in battle, the area was home to many settlements, and in A.D. 43 the Roman invasion force under Claudius estimated that there were around 5000 inhabitants. The first Roman settlement, called Londinium, was founded in A.D. 50, but was razed to the ground by Boudicca in A.D. 60. The Roman's second settlement on the site flourished, however, becoming a key port and centre for trade and commerce. By A.D. 100, its population had reached around 45,000 and it replaced Camulodunum (modern day Colchester) as the capital.
As the Roman occupation began to draw to a close in the 5th century, the Roman population fell untill by 410 it was abandoned completely. The Angles, Saxons and Jutes were quick to take advantage of the now undefended Britain, and the Saxons won their first major victory in Kent in 457, giving them control over Londinium and the surrounding region. Renamed Lundenwic, the settlement once again became a thriving population centre and by 600 had become the base of political power in Saxon-occupied Britain, which accounted for around half of the country. Lundenwic changed hands again in the 9th century, when feuding between Saxon leaders allowed the Danes to take control.
In 871, the English king of Wessex, Alfred, fought the Danes for control and regained most of the city, although the Danes retained the eastern-most section, which today corresponds to the East End.
In 1666 the city was nearly destoyed by the Great Fire. Starting on Pudding Lane in a bakers shop the small fire spread to engulf nearly 80% of the city. Despite the massive loss of property loss of life was minimal. With estimates ranging from a 2 to 16.
In the Renaissance, London became a centre of learning and culture, though the rise of Puritanism in the late 16th century temporarily stifled much art and culture within the city centre. A lot of what Puritans deemed 'unacceptable' moved to the South Bank (the land lying on the south-side of the River Thames). Shakespeare's Globe theatre was located in this area.
Government of London
London is governed by the Mayor of London (currently Boris Johnson), a post not to be confused with that of Lord Mayor of London, which is a largely ceremonial role relating solely to the small City of London district. The mayor's executive is subject to scrutiny by the Greater London Assembly. Most matters relating to local government - local planning control, housing, education, libraries and arts, refuse collection, etc. - are controlled by London's 33 local authorities: 32 London Boroughs, and the City of London Corporation.
Although London is frequently depicted in the American media as a quaint and historic city perpetually shrouded in fog, the reality is that London is a modern city at the cutting edge of developments in architecture, transport, commerce, industry and entertainment, and fog is a rare occurrence. In fact, London is considered by many to be the financial capital of the world as well as the theater capital of the world, and one of the world's premier cities,  a position bolstered by the fact that it contains rich and diverse cultures, due to many waves of immigration since the 17th century.
Notable landmarks include the Houses of Parliament, The London Eye, Buckingham Palace and Westminster Abbey. The London Underground (London's subway system, also known as the Tube) is the oldest in the world.
- Z/Yen Limited (November 2005). The Competitive Position of London as a Global Financial Centre (PDF). CityOfLondon.gov.uk. Retrieved on 2006-09-17.
- The World According to GaWC, GaWC, Loughborough University