Moscow is Russia's capital and the most populous city in Europe. Moscow is one of the world's largest cities, with over 12.5 million residents within the city limits and over 20 million in the metropolitan area. The city has an 800-year history and has played a key role in Russian politics, culture, and economics. Many historical and cultural landmarks may be found in Moscow, including the Kremlin, Red Square, and St. Basil's Cathedral. The city is also a major economic and financial centre, and it is home to the Moscow Exchange, one of Europe's largest stock markets. Moscow is a cosmopolitan and energetic city with a diversified population. People from throughout Russia, as well as from many other countries, live in the city. With towering skyscrapers and centuries-old churches and monasteries, Moscow is a city of contrasts. It is a city rich in history and culture, as well as in commerce and finance, as well as in diversity and excitement.