In the late Middle Ages, the title "grand prince/grand duke" became increasingly a purely ceremonial courtesy title for close relatives of ruling monarchs, such as the Tsar of Russia, who granted his brothers the title Grand Duke of Russia ().
In the late Middle Ages the title "grand prince/grand duke" became increasingly a purely ceremonial courtesy title for close relatives of ruling monarchs such as the Tsar of Russia who granted his brothers the title Grand Duke of Russia ()