The “antoninianus” was a silver coin introduced during the Roman Empire in the late 3rd century AD. It was notable for its silvered appearance and featured the portrait of the reigning emperor on one side and various symbols and inscriptions on the reverse. The antoninianus replaced the denarius as a common currency, but it also experienced debasement, with a decreasing silver content over time. These coins are important for understanding the economic challenges and inflationary pressures faced by the Roman Empire during this period.