This cup is named for JP Morgan, the famous banker who once owned it. It is the only known ancient Roman cameo glass vessel that has survived intact. The scene shows worshippers at a shrine.
Glass of one color covered, usually by casing, with one or more layers of contrasting color(s). The outer layers are acid-etched, carved, cut, or engraved to produce a design that stands out from the background. The first cameo glasses were made by the ancient Romans. The genre was revived in England and, to a lesser extent, in America in the late 19th century.