London is the capital of England and the United Kingdom. It has been an influential city for two millennia and its history goes back to its founding by the Romans. The city's core, the ancient City of London, still retains its limited medieval boundaries. However, since at least the nineteenth century, the name "London" has also referred to the whole metropolis that has developed around it. Today the bulk of this conurbation forms the London metropolitan region and the Greater London administrative area, with its own elected mayor and assembly.
London is one of the world's foremost global cities alongside New York City and one of the largest financial centres alongside New York City and Tokyo. Central London is home to the headquarters of more than half of the UK's top 100 listed companies and more than 100 of Europe's 500 largest. The city's influence in politics, education, entertainment, media, fashion, the arts and culture in general contributes to its global position. It is a major tourist destination for both domestic and overseas visitors. London hosted the 1908 and 1948 Summer Olympics and will host the 2012 Summer Olympics.
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