Crown (heraldry)
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A crown is often an emblem of a sovereign state, usually a monarchy, but also used by some republics.
The Imperial Crown of the Holy Roman Empire, a hoop crown with a characteristic octagonal shape, was the coronation crown of the Holy Roman Emperor, probably from the late 10th century until the dissolution of the Holy 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 at the Hofburg in Vienna, Austria.
Charlemagne wearing the Imperial Crown, by Albrecht Dürer, c. 1512, Germanisches Nationalmuseum in Nuremberg. The picture is anachronistic, since the crown was made a century and a half after Charlemagne's death.
The front right plate shows Jesus with two angels
Front view