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.
List of Russian rulers
This is a list of all reigning monarchs in the history of Russia. It includes titles Prince of Novgorod, Grand Prince of Kiev, Grand Prince of Vladimir, Grand Prince of Moscow, Tsar of All Rus'(Russia), and Emperor of All Russia. The list begins with a semi-legendary Rurik, Prince of Novgorod, sometime in the mid 9th century (c. 862) and ends with the Emperor of All Russia Nicholas II who abdicated in 1917, and was executed with his family in 1918.