The antoninianus was a coin used during the Roman Empire that was valued at 2 denarii. It was initially silver, but was slowly debased to bronze.

The coin was introduced by Caracalla in early 215 and was a full silver coin similar to the denarius except that it was slightly larger and featured the emperor wearing a radiate crown, indicating that it was valued twice as much. Antoniniani depicting females (usually the emperor's wife), featured the bust resting upon a crescent moon. Although valued twice as much as a denarius, the antoninianus had only one and a half the silver content.

Coins of Ancient Rome | Severan Dynasty

Antoninián | Antoninian | Antoniniano | Antoninianus | Antoninian | Antoniniano