Imperial diptych offerings to the emperor. However, the fact that the Barberini ivory was almost certainly not a diptych, but some kind of imperial icon without a second panel is a serious argument against the existence of the imperial diptych type. The two panels representing the empress Ariadne, in the Bargello in Florence and the Kunsthistorisches Museum in Vienna, also belong to the hypothesied imperial diptych type. They are the only central panels of such a diptych (other than the Barberini ivory) to survive, since all other fragments of such diptychs are from side panels. Imperial diptych In Late Antiquity, an imperial
Imperial crown Imperial crown An Imperial Crown is a crown used for the coronation of emperors. Crowns in Europe during the medieval period varied in design: During the medieval era the crowns worn by English kings had been described as both closed (or arched) and open designs. This was in contrast with kings of France who always wore an open crown. However, there is academic debate on how often closed crowns were used in England during this period, as the first unequivocal use of the closed crown was by Henry IV at his coronation on 13 October 1399. However his effigy on