<P> The vast territory known today as Russia covers an area that has been known historically by various names , including Rus ' , Kievan Rus ' , the Grand Duchy of Moscow , the Tsardom of Russia and the Russian Empire , and the sovereigns of these many nations and throughout their histories have used likewise as wide a range of titles in their positions as chief magistrates of a country . Some of the earliest titles include Kniaz and Velikiy Kniaz , which mean `` Prince '' and `` Great Prince '' respectively but are often rendered as `` Duke '' and `` Grand Duke '' in Western literature ; then the title of Tsar , meaning `` Caesar '' , which was disputed to be the equal of either a king or emperor ; finally culminating in the title of Emperor . According to Article 59 of the 1906 Russian Constitution , the Russian Tsar held several dozen titles , each one representing a region which the monarch governed . </P>
<P> The vast territory known today as Russia covers an area that has been known historically by various names , including Rus ' , Kievan Rus ' , the Grand Duchy of Moscow , the Tsardom of Russia and the Russian Empire , and the sovereigns of these many nations and throughout their histories have used likewise as wide a range of titles in their positions as chief magistrates of a country . Some of the earliest titles include Kniaz and Velikiy Kniaz , which mean `` Prince '' and `` Great Prince '' respectively but are often rendered as `` Duke '' and `` Grand Duke '' in Western literature ; then the title of Tsar , meaning `` Caesar '' , which was disputed to be the equal of either a king or emperor ; finally culminating in the title of Emperor . According to Article 59 of the 1906 Russian Constitution , the Russian Tsar held several dozen titles , each one representing a region which the monarch governed . </P>
what were the emperors of the russian empire called
what were the emperors of the russian empire called
Tsar
Tsar