British Museum
Great Russell Street
London
England
WC1B
GB
Glass Cameo, Period: Late Byzantine; circa: 13th century A.D. Brick-red, opaque; on the front, the Crucifixion with, the Virgin at left, St John at right. Set in a metal frame. Diameter: 51 millimetres. British Museum is closed 24, 25 and 26 December and 1 January, but is open every other day of the year. Fast facts about the British Museum: Founded: 1753, Collection size: 8 million objects, Oldest object in the collection: Stone chopping tool (nearly 2 million years old).