Prince-electors were high-ranking nobles in the Holy Roman Empire responsible for electing the Emperor. This unique electoral system was established in the 13th century, allowing a select group of princes to have significant political power. The original number of electors was seven, which included both secular and ecclesiastical leaders, such as the Archbishop of Cologne and the King of Bohemia. The role of prince-electors was crucial in shaping the governance of the empire. Their elections were often influenced by political alliances and territorial interests, reflecting the complex relationships among the various states within the Holy Roman Empire.