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 Regalia Kleinodien ("Aachen jewels"). It is not known how long they have been considered among the Imperial Regalia, nor how long they had been in Aachen. The inventory of the regalia during the late Middle Ages normally consisted only of five to six items. Goffredo da Viterbo counted following items: the Imperial Cross, the Holy Lance, the crown, the sceptre, the orb, and the sword. On other lists, however, the sword is not mentioned. Whether the medieval chronicles really do refer to the same regalia which are kept in Vienna today depends on a variety of factors. Descriptions of the emperors