Muscovy, also known as the Grand Duchy of Moscow, was a historical state that emerged in the late 13th century in what is now western Russia. It played a crucial role in the formation of the modern Russian state and expanded its territory through conquest and diplomacy. Muscovy became a powerful principality, especially under rulers like Ivan III and Ivan IV. By the 16th century, Muscovy had transformed into the Tsardom of Russia, marking the beginning of a centralized Russian state. The region's influence grew significantly, leading to the eventual establishment of the Russian Empire in the 18th century. Muscovy's legacy continues to shape Russian history and culture today.