necessitated by time and place. — Conde.
was the first who had the image of Christ struck on coins, A. D. 710.
The Pope's effigy first occurs on a coin in 1480.
The as libra, in the time of Servius Tullius (550 B. C.), weighed a pound, as its name indicates; by 190 B. C., it had fallen to half an ounce.
Silver was coined 269 B. C., when the denarius weighed 90 grains; in the time of Vespasian, A. D. 70, it had fallen to 53 grains.
The aureus was first issued about 204 B. C., and weighed 166 grains, but had fallen to 96 grains in the time of Heliogabalus, A. D. 218.
The silver coinage of Crotona, 600 B. C., was pure, as was also the gold coinage of Philip of Macedon, 350 B. C. Under Vespasian, A. D. 79, the silver money contained one fourth its weight of copper.
Under Antoninus Pius, A. D. 138, more than one third.
Under Commodus, A. D. 180, nearly one half.
Under Gordian, A. D. 236, more than two thirds of the so-called silver coin was copper.