1. Coin: billon denarius Bookmark Museum number: 8-4355 Culture or time period: Severan Dynasty (193–235 AD) Object class: Antoniniani, Coins (money), and Denarii Function: 7.5 Issued Currency and Associated Containers Production date: 218 AD Dimensions: weight 4.66 grams and linear 23 millimeters Collector: Alfred Emerson and Lapeysonie Collection place: Rome (ancient city)