|Face Value||1 Dollar|
|Size||ca. 11.8 mm|
21. A solidus of Constantine the Great. Constantine who was born in the city of Naissus in about 280 A.D., todays Serbia, replaced the aureus with the lighter solidus during his reign from 306-337. Before long, this new Roman currency was also used outside the realms of the Empire. Constantine was not only clever in dealing with the army and political matters, he also knew how to make the most of all propaganda opportunities. There were many drastic changes in the structure of the Roman Empire during his reign. The system of tetrarchy was abandoned once again, in order to facilitate autocratic rule. The development of Byzantium into an Imperial city, which the Emperor appropriately named Constantinople also, began around the year 330.