CONSTANTINVS AVG, laureate head right. / DN CONSTANTINI MAX AVG, VOT XX in wreath with star in badge at top of wreath. Mintmark TSΓVI in exergue. 19mm, 3.22 grams. Thessalonica mint. RIC VII 117. 

Constantine the Great was a pivotal Roman emperor who unified the empire after defeating Maxentius at the Battle of the Milvian Bridge and later overcoming Licinius to become sole ruler. He issued the Edict of Milan, granting religious tolerance and favoring Christianity, and founded Constantinople as a new imperial capital. He also convened the Council of Nicaea, shaping early Christian doctrine, and his reign marked a major turning point in the Roman Empire’s shift toward Christianity.