Prince-elector
Members of the electoral college that elected the emperor of the Holy Roman Empire
A Prince-Elector of the Holy Roman Empire (Latin: Sacri Romani Imperii Princeps Elector; German: Kurfürst [ˈkuːɐ̯ˌfʏʁst] , pl. Kurfürsten [ˈkuːɐ̯ˌfʏʁstn̩] , from the Middle High German kure "choice" and the German Fürst "prince") was a member of the Electoral College of the Holy Roman Empire, which elected the Holy Roman Emperor, initially according to formally unregulated customs, and since 1356 in accordance with provisions of the Golden Bull. The office was abolished in 1806, upon the Dissolution of the Holy Roman Empire.
From Wikipedia, under CC BY-SA. More on occurri.