Psychiatry & Mental Health

The City

London, city, capital of the United Kingdom. It is among the oldest of the world’s great cities—its history spanning nearly two millennia—and one of the most cosmopolitan. By far Britain’s largest metropolis, it is also the country’s economic, transportation, and cultural Centre. It stands on the river Thames in south-east England at the head of a 50-mile (80 km) estuary down to the North Sea and has been a major settlement for two millennia. The City of London, its ancient core and financial center, was founded by the Romans as Londinium and retains boundaries close to its medieval ones. Since the 19th century, “London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises London, governed by the Greater London Authority. The City of Westminster, to the west of the City of London, has for centuries held the national government and parliament. London  is influence on its arts, commerce, education, entertainment, fashion, finance, healthcare, media, tourism, and communications, and therefore has sometimes been called the capital of the world. Its GDP (€801.66 billion in 2017) makes it the biggest urban economy in Europe, and it is one of the major financial centers in the world. In 2019 it had the second-highest number of ultra-high-net-worth individuals in Europe after Paris and the second-highest number of billionaires of any city in Europe after Moscow. With Europe's largest concentration of higher education institutions, it includes Imperial College London in natural and applied sciences, the London School of Economics in social sciences, and the comprehensive London. The city is home to the most 5-star hotels of any city in the world. In 2012, London became the first city to host three Summer Olympic Games.

London's diverse cultures encompass over 300 languages. The mid-2018 population of Greater London of about 9 million made it Europe's third-most populous city, accounting for 13.4% of the population of the United Kingdom. Greater London Built-up Area is the fourth-most populous in Europe, after Istanbul, Moscow, and Paris, with about 9.8 million inhabitants at the 2011 census. The London metropolitan area is the third-most populous in Europe after Istanbul's and Moscow's, with about 14 million inhabitants in 2016.

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