Russia – Europa Universalis 4 Wiki

Russia does not exist at the beginning of the Grand Campaign; it is a formable country. Historically, the Tsardom of Russia was formed by the Grand Principality of Muscovy on 16 January 1547 when Ivan IV the Terrible crowned himself the “Tsar and Grand Duke of all Rus’”, and Muscovy will usually form Russia in most campaigns.

https://eu4.paradoxwikis.com/Russia