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 Airways "Castor" for Imperial Airways' Empires Air Routes, in 1937. In November 2016, 80 years later, the Crete2Cape Vintage Air Rally flew this old route with fifteen vintage aeroplanes - a celebration of the skill and determination of these early aviators. Imperial Airways operated many types of aircraft from its formation on 1 April 1924 until 1 April 1940 when all aircraft still in service were transferred to BOAC. Imperial Airways Imperial Airways was the early British commercial long-range airline, operating from 1924 to 1939 and serving parts of Europe but principally the British Empire routes to South Africa, India and