London is a place.
A capital city ( or simply capital ) is the municipality exercising primary status in a country , state , province , or other region , usually as its seat of government . London [ ˈlʌndən ] is the capital and most populous city of England and the United Kingdom . London 's ancient core , the City of London , largely retains its 1.12 sqmi medieval boundaries . governed by the Mayor of London and the London Assembly.The London Mayor is not to be confused with the Lord Mayor of London who heads the City of London Corporation , which administers the City of London . London was the world 's most populous city from around 1831 to 1925 .