3This second volume of Pietro Nigro's impressive numismatic collection covers a period starting from the time of Caracalla, for which a new silver coin called "Antoninianus" was minted, and reaches up to the days of Licinius II, who was caesar of the Roman Empire from 317 to 324 AD. The description of the coins, reproduced and accompanied by indications on their features and provenance, is accompanied by historical notes on emperors, governors, generals, and on the most important families.