Coins minted during the reign of Commodus contained images ranging from the emperor himself and deities.  On these coins we can see the evolution of names and political titles that Commodus adopted.  Different value coins could have been a potential medium for the emperor to communicate with different classes of people.  For example, lower class individuals would have considerably less exposure to an Aureus than a wealthy Senator.  Coins also gave the emperor the means to communicate through images.  Many of the people who came into contact with these coins could not read, so the ability to communicate through pictures provided a powerful tool.  Many historians debate whether or not coins were a propaganda tool used by the emperor, but nevertheless they provide unique insight into the workings of the Roman Empire under Commodus.