Russian Empire
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.
Romanov Empire (micronation)
Proponents of the new Russian Empire purport it to be the successor of the historical Russian Empire founded by Peter the Great in 1721. As such, the nation stakes its claim to unpopulated territory that belonged to the historical Russian Empire through "right of discovery", but which was not claimed by the Soviet Union after the 1917 Russian Revolution. It does not claim land that was part of the historical Russian Empire that is now part of Finland, Poland, or the former Soviet republics.