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
San Luca Altarpiece the figures and the "azzurro Todesco" (a blue pigment derived from copper) with which to inlay them. The work was completed within that or the following year. The polyptych is located in Pinacoteca di Brera, Milan. San Luca Altarpiece The San Lucas Altarpiece, also known as the San Lucas Polyptych, is a polyptych panel painting by Northern Italian Renaissance painter Andrea Mantegna. The altarpiece is a polyptych panel painting featuring 12 figures each in his or her own arch. The seven figures in the top row flank the central figure of Jesus Christ. The five beneath flank Saint Luke. On