on Feb 18, 2016
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 | Measurements | 7 grams, 27 mm (diameter) |  | Culture / Period | Ancient / Roman - AD 100 - 300 |   The assassination of Alexander Severus in 235 led to the Crisis of the Third Century in which 26 men were declared Emperor by the Roman Senate over a fifty year period  At its height under Trajan, it covered 5 million square kilometers  [3]     [5]    and held sway over some 70 million people, at that time, 21% of the  world's entire population
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