Age of DiscoveryGovernment & Law Ivan IV crowned tsar 1547Notable Ivan IV becomes the first ruler crowned Tsar of All Russia. He conquers Kazan and Astrakhan and rules through terror in his later years. ▲ MattersSaveShareTrace roots Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → First stone tools → Genus Homo appears → Homo erectus → Control of fire → Habitual fire and cooking → Homo sapiens appears → First seagoing watercraft → Sailing boats → Viking Age begins → Kievan Rus' → Mongols sack Kyiv → Golden Horde → Muscovy ends Mongol overlordship → Ivan IV crowned tsar Community notesLoading notes… Learn more ranked by votesDocumentbritannica.comIvan the Terrible (Britannica) ↗Editor's pickBookIsabel de MadariagaIvan the Terrible ↗Editor's pickVideoSearch on YouTubeIvan the Terrible first tsar ↗Editor's pick