 Because both coins were of similar average weight, the Antiochian coins were 15 percent purer than the Rome equivalents.The mint at Antioch became more important under Gordian, striking even gold coins, something previously only mints in the capital of Rome did on a large scale.During the reign of Gordian, provincial silver coins, produced from the important mints of Antioch, Caesaria, and Alexandria, increasingly came to be used by the state for funding, becoming roughly equal in use to that of the Antoninianus.