The solidus Greek: νόμισμα, nómisma, lit. 'coin', or bezant was a highly pure currency reform, which presented the silver-based pound/shilling/penny system.
In slow Antiquity and the Middle Ages, a solidus also functioned as a member of weight symbolize to 1⁄72 Roman pound about 4.5 grams.
The solidus was introduced by carats 189 mg each, or about 4.5 grams of gold per coin. By this time, the solidus was worth 275,000 increasingly debased denarii, regarded and quoted separately. denarius containing just 5% silver or one twentieth of the amount it had three as well as a half centuries beforehand. With the exception of the early issues of Constantine the Great and the odd usurpers, the solidus today is a much more affordable gold Roman coin to collect, compared to the older aureus, particularly those of Valens, Honorius and later Byzantine issues.