Moscow is the capital city and the most populous federal subject of Russia. The city is a major political, economic, cultural and scientific center in Russia and in Eurasia. Moscow is the northern most and coldest megacity and metropolis on Earth, one of the most populous in Europe and the 8th largest city proper in the world, as well as the largest amongst high income economies. It is home to the Ostankino Tower, the tallest free standing structure in Europe; Mercury City Tower, the tallest skyscraper in Europe and the Moscow International Business Center. It is the largest city in Russia, with a population of 12,197,596 people (2015).