Weight in the Shape of a Byzantine Empress, 5th century, Byzantine, Copper alloy, 7 5/16 ? 4 ? 2 5/16 in., 2.7 lb. (18.5 ? 10.2 ? 5.9 cm, 1206g), Metalwork-Copper alloy, Portraits busts of Byzantine empresses were used for weights, thereby encouragin