Question

Which Russian ruler enlarged the Russian empire

Answer 1

Ivan IV ruled the country of Russia from 1533 to 1584. In 1547 he became Russia's first tsar. ... Ivan IV was the grand prince of Moscow (Muscovy) from 1533 to 1584. In 1547 he became the first Russian leader to use the title of tsar, and was the one that enlarged RUSSIA.

Answer 2

The Russian ruler that enlarged the Russian empire is Ivan IV the terrible.
I hope this helps