French Crown Jewels Holy Ampulla, performed for the first time at Notre-Dame de Reims in 816 for Louis the Pious, then with the Crown of Charlemagne. From 888 to 922, then 1027, all monarchs were crowned until the French revolution, in the Notre-Dame de Reims cathedral (apart from Louis VI and Henry IV, who were crowned in Orléans and Chartres). After the revolution, only Emperor Napoleon I, Empress Josephine and King Charles X were crowned. Though not always used, a set of expensive crown jewels did exist and was augmented by various monarchs. The Crown Jewels or "Diamants de la Couronne de France",
Painting of the Six Kings Betsy Williams of the Metropolitan Museum of Art suggested that the six figures are depicted in supplication, presumably towards the caliph who would be seated in the hall. Other scholars, including Arabic epigraphist Max van Berchem and architectural historian K. A. C. Creswell, argued that the six rulers are a representation of the defeated enemies of Islam. Iranologist and archaeologist Ernst Herzfeld argued that the painting is an Umayyad copy or version of the Sassanian "Kings of the Earth" located at Kermanshah, as recorded by Yaqut al-Hamawi in his work "Mu'jam al-Buldan" ("Dictionary of Countries"). Art historian Oleg Grabar interpreted