The product is a Roman Empire Constantius II AD 337-361 AE4 coin, also known as a "Bi Nummus." This ancient coin belongs to the historical period of Roman Imperial rule, specifically from 27 BC to 476 AD. The coin features the denomination of Nummus and reflects the era of Ancient Rome. With a specific year of 11 AD, this collectible piece offers a glimpse into the rich history and unique numismatic artistry of the Roman Empire.