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.
House of Romanov
The House of Romanov (; also Romanoff; , "Románovy", ) was the reigning dynasty in Russia from 1613 until the abdication of Tsar Nicholas II on 15 March 1917, as a result of the February Revolution. The House of Romanov was the second dynasty to rule Russia, the first being the House of Rurik.