London is the capital city of England and the United
Kingdom
, and the largest city, urban zone and metropolitan
area in the United Kingdom, and the European Union by most
measures. Located on the River Thames, London has been a
major settlement for two millennia, its history going back to its
founding by the Romans, who named it Londinium.   London's
ancient core, the City of London, largely retains its square-mile
mediaeval boundaries. Since at least the 19th century, the name
London has also referred to the metropolis developed around
this core.  The bulk of this conurbation forms the London region
and the Greater London administrative area, governed by the
elected Mayor of London and the London Assembly.

London is a leading global city, with strengths in the arts,
commerce, education, entertainment, fashion, finance,
healthcare, media, professional services, research and
development, tourism and transport all contributing to its
prominence.[8] It is the world's leading financial centre alongside
New York City and has the fifth- or sixth-largest metropolitan
area GDP in the world depending on measurement.  London has
been described as a world cultural capital   It is the world's most-
visited city measured by international arrivals and has the world's
largest city airport system measured by passenger traffic.
London's 43 universities form the largest concentration of higher
education in Europe.

Sovereign state         United Kingdom
Country         England
Region         London
Ceremonial counties         City and Greater London
Districts         City and 32 boroughs
Settled by Romans         as Londinium, c. 43 AD
Headquarters         City Hall
Government
• Regional authority         Greater London Authority
• Regional assembly         London Assembly
• Mayor of London         Boris Johnson
• UK Parliament
*London Assembly
*European Parliament         74 constituencies
14 constituencies
London constituency
Area
• London         1,570 km2 (607 sq mi)
Elevation[1]         24 m (79 ft)
Population [2]
• London         8,173,194
• Density         5,206/km2 (13,466/sq mi)
• Urban zone         11,905,500 Increase
• Metro         13,709,000 Increase