The term 'Russian Ruler of Yore' can be summarized as TSAR, a four-letter word. TSAR was the title of the monarchs of Russia from 1547 to 1917. It was derived from the Latin word Caesar and was used to refer to the emperors of the Russian Empire. Tsars were absolute rulers who had complete control over their subjects and were considered to be divinely appointed. They were also known for their lavish lifestyles and extravagant palaces.