sovereign of the Holy Roman Empire

Charlemagne / Charles I / Charles the Great - king of the Franks and Holy Roman Emperor
Charles II / Charles I / Charles the Bald - as Charles II he was Holy Roman Emperor and as Charles I he was king of France (1630-1685)
Ferdinand I - Holy Roman Emperor and king of Hungary and Bohemia (1503-1564)
Ferdinand II - Holy Roman Emperor and king of Bohemia and Hungary who waged war against Protestant forces (1578-1637)
Ferdinand III - Holy Roman Emperor and king of Hungary and Bohemia who signed the Peace of Westphalia ending the Thirty Years'' War (1608-1657)
Francis II / Emperor Francis II - the last Holy Roman Emperor (1768-1835)
Frederick I / Frederick Barbarossa / Barbarossa - Holy Roman Emperor from 1152 to 1190
Frederick II / Holy Roman Emperor Frederick II - the Holy Roman Emperor who led the Sixth Crusade and crowned himself king of Jerusalem (1194-1250)
Otto I / Otho I / Otto the Great - king of Germany and Holy Roman Emperor (912-973)

    Emperor