Imperial diptych Imperial diptych In Late Antiquity, an imperial diptych is a theoretical type of ivory diptych, made up of two leaves of five panels each and each with a central panel representing the emperor or empress. They are so-named in contrast to consular diptychs. They were produced as unique examples, whereas each consular diptych was produced in large numbers to offer to the emperor on certain occasions, principally a nobleman's entry to the consulship. No complete example of an imperial diptych survives and so their existence is contested. The ivories specialist R. Delbrück has theorised that the 19 surviving fragments of
Mérode Altarpiece Mérode Altarpiece The Mérode Altarpiece (or Annunciation Triptych) is an oil on oak panel triptych, now in The Cloisters, in New York City. It is unsigned and undated, but attributed to Early Netherlandish painter Robert Campin and an assistant. The three panels represent, from left to right, the donors kneeling in prayer in a garden, the moment of the Annunciation to Mary, which is set in a contemporary, domestic setting, and Saint Joseph, a carpenter with the tools of his trade. The many elements of religious symbolism include the lily and fountain (symbolising the purity of Mary), and the Holy