Denarius Debasement of the coin's silver content continued after Nero. Later Roman emperors reduced its content to 3 grams around the late 3rd century. The value at its introduction was 10 asses, giving the denarius its name, which translates as "containing ten". In about 141 BC, it was re-tariffed at 16 asses, to reflect the decrease in weight of the as. The denarius continued to be the main coin of the Roman Empire until it was replaced by the antoninianus in the middle of the 3rd century. The coin was last issued, in bronze, under Aurelian between AD 270 and 275,
Silver coin which was basically what was left of the eastern Roman Empire, the currency system was reorganised, but the coinage mostly consisted of copper and gold. A silver miliaresion was developed, usually with a cross on steps obverse and an inscription forming the reverse. Later, the cup-shaped (or 'scyphate') trachy were issued, but the silver content of these rapidly declined towards only a few per cent, finally ending up as a pure copper coin after the Fourth Crusade (13th century). Muhammad established the Constitution of Medina in 622 in the Arabian Peninsula. After the death of Mohammed in 632, the state