Imagine, you are walking through a field in England. You aren't particularly looking for anything, just taking a stroll, when you see a coin. You know how the saying goes - see a penny, pick it up, all day long you'll have good luck! When you pick the coin up though, you know it is something a bit more special - you've seen them in the local museum. This is a Roman coin and it was just lying around in a field. Amazing!