London is the capital and biggest city of England and the United Kingdom. Remaining on the River Thames in the south-east of England, at the leader of its 50-mile (80 km) estuary prompting the North Sea, London has been a significant settlement for two centuries. Londinium was established by the Romans. The City of London, London's antiquated center − a region of simply 1.12 square miles (2.9 km²) and informally known as the Square Mile − holds limits that pursue intently its medieval breaking points. The City of Westminster is additionally an Inner London district holding city status. More noteworthy London is administered by the Mayor of London and the London Assembly. London is viewed as one of the world's most significant worldwide urban areas and has been named the world's generally ground-breaking, generally alluring, generally compelling, most visited, generally costly, imaginative, reasonable, most venture inviting, and generally prevalent for work city on the planet. London applies a significant effect upon expressions of the human experience, business, instruction, diversion, design, account, social insurance, media, proficient administrations, innovative work, the travel industry, and transportation.