In a time when few members of the population could read or write, the symbols depicted on coins offered a medium for communication, propaganda, and historical archiving. This work hypothesizes that astronomical symbols on ancient and medieval coins were often used as a way to record actual celestial events. The author provides more than 550 figures and line drawings of coins, maps, and astronomical events to illustrate this hypothesis. In addition, several appendices evaluate the historical accuracy of ancient and medieval coinage and offer additional examples not included in the main volume.