The famed empress of Russia known for her significant reforms is Catherine the Great, who ruled from 1762 to 1796. She is remembered for her ambitious and transformative policies that expanded the Russian Empire and modernized its governance. Catherine implemented administrative reforms, promoted education, and fostered the cultural arts, embodying Enlightenment ideas in her rule. She also effectively expanded Russia's territory, including the annexation of Crimea. Despite her successes, Catherine faced challenges, such as serfdom and internal rebellions, but her legacy remains influential in Russia’s history, showcasing her as a pivotal figure in accelerating the country towards modernity.