The aureus was the main gold coin of ancient Rome from the 1st century BC to the early 4th century AD, when it was replaced by the solidus. This type of coin was sporadically issued during the Republi
Aureus minted in 193 by Septimius Severus to celebrate Legio XIV Gemina, the legion that proclaimed him emperor
Issue worth 40 (XXXX) asses, 211 BC. The obverse depicts the god Mars.
Issue minted by Sulla, 82 BC. The obverse depicts Roma.
Issue minted by Caesar, 45 BC. The obverse depicts Victory.
Roman currency for most of Roman history consisted of gold, silver, bronze, orichalcum, and copper coinage. From its introduction during the Republic, in the third century BC, through Imperial times,
Aureus
…and 100 sestertii. It was about the same size as the denarius, but heavier than the denarius since gold is denser than silver. The production of proper Roman coins began in the 3rd century BC and was limited to the minting of bronze asses; the gold brought back from spoils and war indemnities was stored in the…
Denarius of Marcus Aurelius. Legend: IMP. M. ANTONINVS AVG. TR. P. XXV.
Bronze aes signatum produced by the Roman Republic after 450 BC
Coins of the Roman Republic and Empire from Cassell's History of England, Vol. I
The rapid decline in silver purity of the antoninianus