Rome's conquests gave her access to the accumulated metal resources of most of the known world. An abundant gold and silver coinage circulated within her empire as a result. But coinage changes later suggest difficulty in maintaining metal supplies. By studying Roman coin-survivals in a wider context, Dr Duncan-Jones uncovers important facts about the origin of coin hoards of the Principate. He constructs a new profile of minting, financial policy and monetary circulation, by analysing extensive coin evidence collected for the first time. His findings considerably advance our knowledge of crucial areas of the Roman economy.