Octagonal intaglio, Period: Late Byzantine; circa: 14thc. Made in: Constantinople. Dimensions: Height: 1.7 centimetre. Material: sard. 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).
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