Moscow ( , romanised: Moskva, IPA: ; see also other names) is the capital and the largest city of Russia. It is also the largest metropolitan area in Europe, and ranks among the largest urban areas in the world. Moscow is a major political, economic, cultural, religious, financial, educational, and transportation centre of Russia and the world. It is also the seventh largest city proper in the world, and a megacity.

It is located on the Moscow River in the Central Federal District, in the European part of Russia. Historically, it was the capital of the former Soviet Union, Russian Empire, Tsardom of Russia and the Grand Duchy of Moscow. It is the site of the Moscow Kremlin, which serves as the residence of the President of Russia. The Russian parliament (the State Duma and the Federation Council) and the Government of Russia also sit in Moscow.

Moscow is a major economic centre and is home to the largest number of billionaires in the world; in 2008 Moscow was named the world's most expensive city for foreign employees for the third year in a row.

It is home to many scientific and educational institutions, as well as numerous sport facilities. It possesses a complex transport system, that includes 3 international airports, 9 railroad terminals, and the world's second busiest (after Tokyo) metro system which is famous for its architecture and artwork. Its metro is the busiest single-operator subway in the world.

A person from Moscow is called a Muscovite.

History

City is named after the river (old , literally "the city by the Moskva River"). The origin of the name is unknown, although several theories exist. One theory suggests that the source of the name is an ancient Finnic language, in which it means “dark” and “turbid”. The first Russian reference to Moscow dates from 1147 when Yuri Dolgoruki called upon the prince of the Novgorod Republic to “come to me, brother, to Moscow.”

Nine years later, in 1156, Prince Yuri Dolgoruki of Rostov ordered the construction of a wooden wall, which had to be rebuilt multiple times, to surround the emerging city. After the sacking of 1237–1238, when the Mongols burned the city to the ground and killed its inhabitants, Moscow recovered and became the capital of the independent Vladimir-Suzdal principality in 1327. Its favourable position on the headwaters of the Volga River contributed to steady expansion. Moscow developed into a stable and prosperous principality, known as Grand Duchy of Moscow, for many years and attracted a large number of refugees from across Russia.

Under Ivan I the city replaced Tver as a political centre of Vladimir-Suzdal and became the sole collector of taxes for the Mongol-Tatar rulers. By paying high tribute, Ivan won an important concession from the Khan. Unlike other principalities, Moscow was not divided among his sons but was passed intact to his eldest. However, Moscow's opposition against foreign domination grew. In 1380, prince Dmitry Donskoy of Moscow led a united Russian army to an important victory over the Tatars in the Battle of Kulikovo which was not decisive, though. Only two years later Moscow was sacked by khan Tokhtamysh. In 1480, Ivan III had finally broken the Russians free from Tatar control, allowing Moscow to become the centre of power in Russia. Under Ivan III the city became the capital of an empire that would eventually encompass all of present-day Russia and other lands.