Russian Empire
Though the Empire was only officially proclaimed by Tsar Peter I following the Treaty of Nystad (1721), some historians would argue that it was truly born either when Ivan III of Russia conquered Veliky Novgorod in 1478, or when Ivan the Terrible conquered the Khanate of Kazan in 1552. According to another point of view, the term "Tsardom", which was used after the coronation of Ivan IV in 1547, was already a contemporary Russian word for empire.
Russian Empire
Economically, the empire had a predominantly agricultural base, with low productivity on large estates worked by serfs, Russian peasants (until they were freed in 1861). The economy slowly industrialized with the help of foreign investments in railways and factories. The land was ruled by a nobility (the boyars) from the 10th through the 17th centuries, and subsequently by an emperor. Tsar Ivan III (1462–1505) laid the groundwork for the empire that later emerged. He tripled the territory of his state, ended the dominance of the Golden Horde, renovated the Moscow Kremlin, and laid the foundations of the Russian state. Emperor Peter the Great (1682–1725) fought numerous wars and expanded an already huge empire into a major European power. He moved the capital from Moscow to the new model city of St. Petersburg, and led a cultural revolution that replaced some of the traditionalist and medieval social and political mores with a modern, scientific, Europe-oriented, and rationalist system.