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.
Emperor of All Russia
On November 2, 1721 Peter I accepted the title. The Dutch Republic and Kingdom of Prussia immediately recognized the new title of the Russian Tsar, followed by the Kingdom of Sweden in 1723, the Ottoman Empire in 1739, the British Empire and the Austrian Empire in 1742, French Empire and the Spanish Empire in 1745, and finally the Polish-Lithuanian Commonwealth in 1764. Since then the Russian State was referred to as the Russian Empire.