Imperial Crown of the Holy Roman Empire

The Imperial Crown of the Holy Roman Empire (German: Reichskrone), a hoop crown (Bügelkrone) with a characteristic octagonal shape, was the coronation crown of the Holy Roman Emperor, probably from the late 10th century until the dissolution of theHoly Roman Empire in 1806. The crown was used in the coronation of the King of the Romans, the title assumed by the Emperor-elect immediately after his election. It is now kept in the Imperial Treasury (Kaiserliche Schatzkammer) at the Hofburg in Vienna, Austria.