A rare silver coin dating back to 211 BC has been unearthed at the Leicestershire village of Hallaton in the UK. The coin is considered to be the oldest piece of Roman currency.<br/><br/>A metal detectorist found the 2,221-year-old coin — a denarius — along with 5,000 other coins, a richly decorated Roman cavalry helmet and a unique decorated silver bowl.<br/><br/>While one side of the coin depicts the goddess Roma wearing her characteristic helmet, the other side shows mythical twins Castor and Pollux sit astride galloping horses.<br/> <br/>The coin is considered to have been minted in Rome at the time of the Hannibalic wars and reached Britain after passing through many hands. It is preserved at the Harborough Museum in Leicestershire.