What was Ivan IV (the Terrible) known for?

expanding the Russian Empire, building magnificent colored domes, and ruling through cruelty


creating a new code of law for Russia, building many churches, but allowing serfs to starve because of high taxes


building a new capital at Kiev, defeating the Mongols with enormous violence, and converting to Christianity


building the Russian army, introducing a new religion, and restoring the Kremlin at great cost to his people