Ivan became the Grand Prince of Moscow when he was just three years old. When he was young, a group of Russian nobles ran the country in his place. In those days, Russia was divided into many kingdoms like Moscow. At the age of 16, Ivan and his government changed his title to Tsar of all Russia. Over the next few years, Ivan took full control of the government and conquered lands to the east of the Tatars. He began turning Russia from a divided group of kingdoms into an empire with one powerful ruler, at the cost of many lives.