Tsarist autocracy (tsarskoye samoderzhaviye), also called Tsarism, was a form of absolute monarchy localised with the Grand Duchy of Moscow and its successor states the Tsardom of Russia and the Russian Empire. In it, the Tsar possessed in principle authority and wealth, with more power than constitutional monarchs counterbalanced by legislative authority, as well as a more religious authority than Western monarchs. The institution originated during the time of Ivan III (1462−1505) and was abolished after the Russian Revolution of 1917. Imperial autocracy, Russian autocracy, Muscovite autocracy, tsarist absolutism, imperial absolutism, Russian absolutism, Muscovite absolutism, Muscovite despotism, Russian despotism, tsarist despotism or imperial despotism. Ivan III (reigned 1462–1505) built upon Byzantine traditions and laid foundations for the tsarist autocracy which with some variations would govern Russia for centuries. Absolutism in Russia gradually developed during the 17th and 18th centuries, replacing the despotism of the Grand Duchy of Moscow. After chaotic Time of Troubles (1598-1613), the first monarch of the Romanov dynasty, Michael of Russia (reigned 1613–1645), was elected to the throne by a Zemsky Sobor ("assembly of the land"). During Michael's reign, when the Romanov dynasty was still weak, such assemblies were summoned annually. The Romanov dynasty consolidated absolute power in Russia during the reign of Peter the Great (reigned 1682–1725), who reduced the power of the nobility and strengthened the central power of the tsar, establishing a bureaucratic civil service based on the Table of Ranks but theoretically open to all classes of the society, in place of the nobility-only mestnichestvo which Feodor III had abolished in 1682 at the request of the highest boyars. Peter I also strengthened state control over the Russian Orthodox Church. Peter's reforms provoked a series of palace coups seeking to restore the power of the nobility.