House of Romanov (1881–1894), and Nicholas II (1894–1917). Constantine Pavlovich and Michael Alexandrovich, both morganatically married, are occasionally counted among Russia's emperors by historians who observe that the Russian monarchy did not legally permit interregnums. But neither was crowned and both actively declined the throne. The February Revolution of 1917 resulted in the abdication of Nicholas II in favor of his brother Grand Duke Michael Alexandrovich. The latter declined to accept imperial authority save to delegate it to the Provisional Government pending a future democratic referendum, effectively terminating the Romanov dynasty's rule over Russia. After the February Revolution, Nicholas II and his family
Coronation of the Russian monarch Russian Revolution of 1917, coronation ceremonies no longer play any role in Russian political or religious life. While earlier rulers of Muscovy had been crowned prior to Prince Ivan III, the coronation ceremony in its "Byzantine" form was first brought to Russia by Ivan's wife, Sophia Paleologue, niece to the last Emperor of Byzantium, Constantine XI. Sophia is credited with introducing this and other Byzantine ceremonies and customs, which were adopted by her husband Ivan III and continued under his Muscovite and Russian successors. The modern coronation, introducing "European-style" elements, was first used for Catherine I in 1724. While several