The election of a Holy Roman Emperor was generally a two-stage process whereby the King of the Romans was elected by a small body of the greatest princes of the realm, the prince-electors. This was then followed shortly thereafter by his coronation as king, originally at Aachen and later at Frankfurt. The king was then expected to march to Rome, to be crowned Emperor by the pope. In 1356, the Emperor Charles IV promulgated the Golden Bull, which became the fundamental law by which all future kings and emperors were elected. After 1508, rulers usually were recognized as "Emperor elect" after their first, royal coronation.
The election of Matthias as Roman-German Emperor by the prince electors in 1612 depicted on a contemporary engraving
The Emperor and the eight electors (of Trier, Cologne, Mainz, Bohemia, Bavaria, Saxony, Brandenburg and the Electorate of the Palatinate). Copper engraving by Abraham Aubry, Nuremberg, 1663/64.
The Holy Roman Emperor, originally and officially the Emperor of the Romans during the Middle Ages, and also known as the Roman-German Emperor since the early modern period, was the ruler and head of state of the Holy Roman Empire. The title was held in conjunction with the title of king of Italy from the 8th to the 16th century, and, almost without interruption, with the title of king of Germany throughout the 12th to 18th centuries.
Longest reigning Frederick III 19 March 1452 – 19 August 1493
Coats of arms of prince electors surround the imperial coat of arms; from a 1545 armorial. Electors voted in an Imperial Diet for a new Holy Roman Emperor.
Depiction of Charlemagne in a 12th-century stained glass window, Strasbourg Cathedral, now at Musée de l'Œuvre Notre-Dame.
Illustration of the election of Henry VII (27 November 1308) showing (left to right) the Archbishop of Cologne, Archbishop of Mainz, Archbishop of Trier, Count Palatine of the Rhine, Duke of Saxony, Margrave of Brandenburg and King of Bohemia (Codex Balduini Trevirorum, c. 1340).
