With ever more coins in circulation in the Roman Empire during this time, the individual value of these coins fell. As the empire began to contract in the third century, silver became harder to get.
A rare Roman coin with an image of Brutus ... adding its circulation offered "propaganda value" for Brutus. It is one of only 17 known artefacts of its kind, the auction house in Geneva added.
A hoard of early 4th Century Roman coins is believed to be the largest ... finding an object believed to be more than 300 years old and containing precious metal must declare it.