The city is served by a transit network, which includes four international airports, nine railway terminals, numerous trams, a monorail system and one of the deepest underground rapid transit systems in the world, the Moscow Metro, the fourth-largest in the world and largest outside Asia in terms of passenger numbers, and the busiest in Europe.It is recognised as one of the city's landmarks due to the rich architecture of its 200 stations.) (The Forty Soroks, "sorok" translates as forty, but here it is old name of district or parish, and "forty" in old Russian means not 40, but "great many"). In old Russian the word " However, there have been proposed several theories of the origin of the name of the river.In the 9th century, the Oka River was part of the Volga trade route, and the upper Volga watershed became an area of contact between the indigenous Finno-Ugric such as the Merya and the expanding Volga Bulgars (particularly the second son of Khan Kubrat who expanded the borders of the Old Great Bulgaria), Scandinavian (Varangians) and Slavic peoples.
In 1156, Knjaz Yury Dolgoruky fortified the town with a timber fence and a moat.
In the course of the Mongol invasion of Rus, the Mongols under Batu Khan burned the city to the ground and killed its inhabitants.
The timber fort na Moskvě "on the Moscow river" was inherited by Daniel, the youngest son of Alexander Nevsky, in the 1260s, at the time considered the least valuable of his father's possessions.
Daniel was still a child at the time, and the big fort was governed by tiuns (deputies), appointed by Daniel's paternal uncle, Yaroslav of Tver.
The most linguistically well-grounded and widely accepted is from the Proto-Balto-Slavic root *mŭzg-/muzg- from the Proto-Indo-European * hence it was one of a few Slavic ū-stem nouns.
As with other nouns of that declension, it had been undergoing a morphological transformation at the early stage of the development of the language, as a result the first written mentions in the 12th century were has been formed, later it became a colloquial name for Russia used in Western Europe in the 16th–17th centuries.The oldest evidence of humans on the territory of Moscow dates from the Neolithic (Schukinskaya site on the Moscow River).Within the modern bounds of the city other late evidence was discovered (the burial ground of the Fatyanovskaya culture, the site of the Iron Age settlement of the Dyakovo culture), on the territory of the Kremlin, Sparrow Hills, Setun River and Kuntsevskiy forest park, etc.Daniel has been credited with founding the first Moscow monasteries, dedicated to the Lord's Epiphany and to Saint Daniel. Before his death he became a monk and, according to his will, was buried in the cemetery of the St. Moscow was stable and prosperous for many years and attracted a large number of refugees from across Russia.Daniel I ruled Moscow as Grand Duke until 1303 and established it as a prosperous city that would eclipse its parent principality of Vladimir by the 1320s. The Rurikids maintained large landholdings by practicing primogeniture, whereby all land was passed to the eldest sons, rather than dividing it up among all sons.Moscow is the seat of power of the Government of Russia, being the site of the Moscow Kremlin, a medieval city-fortress that is today the residence for work of the President of Russia.