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.
Ukrainians in Russia
Grand Prince of Kiev Vladimir II Monomakh founded the principality of Vladimir-Suzdal, and his son Yuri Dolgoruki founded the city of Moscow in 1147. However, by the end of the 12th century the prominence of Rus' began to decline as Kiev's central role became disputed by the surrounding principalities which were increasingly more powerful and independent. Dolgoruki's son Andrei I Bogolyubsky plundered Kiev in 1169, an event that allowed the Principality of Vladimir-Suzdal to take a leading role as the predecessor of the modern Russian state.