The following outline is provided as an overview of and topical guide to the city known as London:
London – capital and most populous city of England, and the United Kingdom. On the River Thames in the south east of the island of Great Britain, London has been a major settlement for two millennia. It was founded by the Romans, who named it Londinium. London is a cultural capital and leading global city in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism, and transport. It is the world's financial capital and has the fifth-or sixth-largest metropolitan areaGDP in the world.