Lycurgus Cup
Art object
The Lycurgus Cup is a 4th-century Roman glass cage cup made of a dichroic glass, which shows a different colour depending on whether or not light is passing through it: red when lit from behind and green when lit from in front. Wikipedia
Created: 4th century CE
Material: Glass, dichroic, later gilt-silver ornament mounted to rim and foot
Location: the British Museum
Identification: 1958,1202.1
Period/culture: Late Roman
Size: Height: 15.9 cm (6.3 in); Width: 13.2 cm (5.2 in)
Weight: 700 g (1.5 lb)