London - city and capital of the United Kingdom. It is among the oldest of the world’s great cities—its history spanning nearly two millennia
and one of the most cosmopolitan. By far Britain’s largest metropolis, it is also the country’s economic, transportation, and cultural centre. The city of London was founded by the Romans and their rule extended from 43 AD to the fifth century AD, when the Empire fell. During the third century, Londinium, the name given to the town by the Romans, had a population of 50,000, mainly due to the influence of its major port.