London is the capital of England and the United Kingdom. The city's core, the ancient City of London, still retains its limited medieval boundaries. London is one of the world's foremost global cities alongside New York City and the largest financial centre 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.