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,
As (Roman coin) 14th century. It was a low-quality flat copper coin, weighing ca. 3–4 grams and forming the lowest denomination of contemporary Byzantine coinage, being exchanged at 1:768 to the gold "hyperpyron". It appears that the designs on the "assarion" changed annually, hence they display great variations. The "assarion" was replaced in 1367 by two other copper denominations, the "tournesion" and the "follaro". As (Roman coin) The (plural ), occasionally assarius (plural assarii, rendered into Greek as , assarion) was a bronze, and later copper, coin used during the Roman Republic and Roman Empire. The Romans replaced the usage of Greek coins,