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 Highness imperial houses, among many others. Archdukes of Austria from the Habsburg dynasty traditionally hold the style of Imperial and Royal Highness (), with the "Royal" signifying their status as Princes of Hungary. These styles have been abrogated but are often given out of courtesy. Some members of the royal family of Belgium descending from the Habsburgs do hold it as an official style (the "and Royal" might here possibly be read as referring as well to Belgium). Members of the British Royal Family, theoretically, as the Imperial Family of British India, could have used the title, but did not. Imperial