Brisith Museum
Great Russell Street
London
England
WC1B
GB
Gold coin; Ruler: Manuel I Comnenus, Byzantine emperor; Period: Middle Byzantine; circa: 1143-1180; Minted in Constantinople. 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).