Which ruler is known for centralizing power in Russia and expanding the state's territory?

Peter the Great is recognized for significantly centralizing power in Russia and expanding its territory during his reign from 1682 to 1725. He implemented extensive reforms across various aspects of Russian society, government, and the military to modernize and strengthen the state. His efforts included building a powerful navy and creating a professional army, which helped Russia become a major European power. Additionally, Peter focused on territorial expansion, notably through his engagements in the Great Northern War, which ultimately led to Russia gaining access to the Baltic Sea and establishing the new capital, St. Petersburg. These actions laid the groundwork for Russia’s transformation into a formidable empire.