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 Valley and to the south the international boundary with the U.S. state of California and Baja California. The culture of the area blends those of the United States and Mexico, due to its regional history and geographic location along the international border. The Imperial Valley economy is based on agriculture. Imperial Valley was so named by the Imperial Land Company, in hopes of attracting settlers. Having done that it is now the home of the El Centro metropolitan area and also an economic center of California's government defined "South Border". Locally, the terms "Imperial Valley" and "Imperial County" are used synonymously.