London is the capital of the United Kingdom (UK), and its largest city.
It is also the city with the highest population in the UK. The population is just under 9 million. The city is the largest in western Europe by population and area.
On the Thames, London has been a central city since it was founded by the Romans two millennia ago as Londinium. The Romans bridged the river Thames and built a road network to connect Londinium with the rest of the country.