Emperor Crispus, son of Roman Emperor Constantine I and Minervina, ruled from 317-326. During his reign, many coins were minted, which can be divided into the following groups: Gold coins of Crispus: Aureus: the coins were made of gold and weighed 4.5 grams. They featured the portrait of Crispus and the imperial symbols on the reverse.Solidus: these coins were made of gold and weighed 4.55 grams. Crispus' portrait and the imperial symbols were depicted on the reverse, as well as the inscription "CONSTANTINVS MAXIMVS AVGVSTVS ET CRISPVS NOB(ILIS) CAESAR". Crispus' silver coins: Denarius: the coins were made of silver and weighed 3.4 grams. The portrait of Crispus and the imperial symbols can be seen on the reverse.Follis: the coins were made of silver and weighed 10.7 grams. The portrait of Crispus and the imperial symbols were depicted on the reverse, as well as the inscription "CONSTANTINVS MAXIMVS AVGVSTVS ET CRISPVS NOB(ILIS) CAESAR". Bronze coins of Crispus: Antoninianus: these coins were made of bronze and weighed 23.4 grams. The portrait of Crispus and the imperial symbols were depicted on the reverse.Semis: the coins were made of bronze and weighed 11.7 grams. The portrait of Crispus and the imperial symbols can be seen on the reverse.Quadrans: these coins were made of bronze and weighed 5.85 grams. The portrait of Crispus and the imperial symbols were depicted on the back. The coinage of Crispus was roughly the same as that of his father, Constantine I. The coinage of Crispus is important for Roman numismatics as these coins provide insight into the period of the emperor's reign.