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
Roman Rosen of Portsmouth was a diplomatic triumph, which ended the war on very favorable terms for Russia. Rosen stayed in the United States until autumn 1911, when he was recalled to St. Petersburg to retire from the diplomatic service. He was subsequently appointed by Tsar Nicholas II to the State Council of Imperial Russia. He held this membership in the Russian parliamentary Upper House under the Constitution of 1905 until the overthrow of the monarchy by the February Revolution in 1917. After the Bolshevik takeover in November 1917 October Revolution and the subsequent persecution of the old political and social elites,