From the middle of the 13th century, the territories of the Moscow region were under the Mongol-Tatar yoke, and in the middle of the 14th century, the Moscow Principality began to unite the surrounding Russian lands to fight the Mongol-Tatars. Serpukhov, Zaraysk, Kolomna, Mozhaisk and other cities of the modern Moscow region were fortresses, and the Trinity-Sergius Monastery, founded in the middle of the 14th century, became one of the most important centers of national revival. After the overthrow of the Mongol-Tatar yoke, Grand Duke Ivan III united a significant part of the Russian lands around Moscow, creating the Russian state.
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5. Moscow province – the “predecessor” of the Moscow region
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By decree of Peter I in 1708, Russia was divided into eight provinces, including Moscow. This province was very large, it included the territories of today's Vladimir, Ivanovo, Ryazan, Tula, Yaroslavl, Kaluga and Kostroma regions. At that time, its area was more than 128,000 square kilometers (three times larger than the area of today's Moscow region). However, later, one region after another was separated from Moscow province, and by the beginning of the 20th century it occupied only 33,000 square kilometers.
By the way, the modern coat of arms of the Moscow region is based on the coat of arms of the Moscow province, approved in 1856.