One of the most recognizable of Caesar’s coins, the elephant denarii was one of the most politically charged and symbolically rich coins of the Roman Republic. They were struck by a mobile military mint either in Hispania Citerior or Gallia Narbonensis during the Roman Civil War. Since they were struck using treasury silver and named himself as Imperator these coins stood as a physical representation of Caesar's usurpation of Senate authority. In fact, there are four general theories as to what the elephant-snake imagery means. Firstly, as a political Allegory, the elephant might represent Caesar trampling Pompey Magnus, represented by the snake. Also, it has been argued that the snake may actually be a carnyx, a Gallic war trumpet often shaped like a serpent, referencing Caesar's recent conquest of Gaul. The coin may also be a reference to Caesar's victory at the Battle of Thapsus, where he successfully employed war elephants against the opposing forces. Lastly the coin could be a generalized symbol of good conquering evil.