1. Coin: billon antoninianus Bookmark Museum number: 8-8792 Culture or time period: Diocletian and the Tetrarchy (285–313 AD) Object class: Antoniniani and Coins (money) Function: 7.5 Issued Currency and Associated Containers Production date: 291-292 AD Dimensions: linear 24 millimeters and weight 4.45 grams Collector: Alfred Emerson Collection place: Lugdunum (ancient city), Gaul Collection date: unknown Person depicted: Diocletian (Emperor of Rome)