Explain Russian empire in english.

The Russian Empire also known as Imperial Russia or simply Russia was an empire that existed across Eurasia and North America from 1721, following the end of the Great Northern War, until the Republic was proclaimed by the Provisional Government that took power after the February Revolution of 1917.

The third largest empire in world history, stretching over a massive three continents, the Russian Empire was surpassed in landmass only by the British and Mongol empires. The rise of the Russian Empire happened in association with the decline of neighboring rival powers: the Swedish Empire, the Polish-Lithuanian Commonwealth, Persia and the Ottoman Empire. It played a major role in 1812-1814 in defeating Napoleon's ambitions to control Europe and expanded to the west and south.

It was an absolute monarchy ruled by Russian emperors known as "Tsars". They were members of the House of Romanov and believed that they had the divine right of kings over their people. In 1914, the Russian Empire covered an area of about 21,799,825 km². In 1897, it had a population of 128,200,000 (1897 year).