London is located in southeastern England on the River Thames, with the City of London being its historic centre. The Greater London Authority region, which covers much of the Greater London Built-Up Area, had an estimated 8.3 million inhabitants in 2017, making it the largest metropolitan area in the United Kingdom. London is the third most populous city in Europe, after Paris and Istanbul, and the 26th most populous city in the world.
London has a long history, dating back to its founding by the Romans in the 1st century. It has been the capital of England since the late 11th century and has been a major centre for politics, finance, commerce, culture and the arts for many centuries. London is a global city and a major business and financial centre, with many of the world's largest banks, corporations and law firms headquartered in the city. London is also a major tourist destination, with many iconic landmarks such as the Tower of London, Buckingham Palace, the British Museum and the London Eye.
London has a diverse population and is home to many different cultures and ethnicities. The city has a rich history of immigration and has been shaped by the contributions of people from all over the world. London is a vibrant and cosmopolitan city with a wide range of attractions, including world-class museums, art galleries, theatres and restaurants.