History of Russia
The war ended in 1721 when an exhausted Sweden sued for peace with Russia. Peter acquired four provinces situated south and east of the Gulf of Finland, thus securing his coveted access to the sea. There, in 1703, he had already founded the city that was to become Russia's new capital, Saint Petersburg, as a "window opened upon Europe" to replace Moscow, long Russia's cultural center. Russian intervention in the Commonwealth marked, with the Silent Sejm, the beginning of a 200-year domination of that region by the Russian Empire. In celebration of his conquests, Peter assumed the title of emperor, and the Russian Tsardom officially became the Russian Empire in 1721.
Russian Empire
In addition to almost the entire territory of modern Russia, prior to 1917 the Russian Empire included most of Dnieper Ukraine, Belarus, Bessarabia, the Grand Duchy of Finland, Armenia, Azerbaijan, Georgia, the Central Asian states of Russian Turkestan, most of the Baltic governorates, as well as a significant portion of the Kingdom of Poland and Ardahan, Artvin, Iğdır, Kars and northeastern part of Erzurum Provinces from the Ottoman Empire.