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.
Romanov Empire (micronation)
The Romanov Empire (), also known as the Imperial Throne (), formerly the Russian Empire (Российская Империя), is a state proposed by Russian businessman and politician Anton Bakov as a re-creation of the Russian monarchy. It would be led by Romanov pretender Prince Karl Emich of Leiningen as Emperor Nicholas III, with Bakov serving as Archchancellor.