The Crown of Charlemagne is a historic royal crown that symbolizes the authority of the Holy Roman Empire. Made of gold and adorned with precious stones, it was created in the late 8th or early 9th century. The crown is associated with Charlemagne, the first Holy Roman Emperor, who was crowned by Pope Leo III in 800 AD. This crown is part of the Regalia of the Holy Roman Empire, which includes other important items like the scepter and orb. The Crown of Charlemagne is currently housed in the Palatine Chapel in Aachen, Germany, where Charlemagne established his court.