Emperor of the Antoninus dynasty. He is the father of Marcus Aurelius' wife. Hadrian adopted him to rule in place of his own heirs.

CAESAR TITVS AELIVS HADRIANVS ANTONINVS AVGVSTVS PIVS

Emperor Antoninus Pius ruled the Roman Empire from 138-161. During his reign, the empire lived in peace and prosperity. His coinage also reflects this peace and prosperity. The main types of coins of Antoninus Pius were aureus, denarii, antoninians and sestertius. The aureus were made of gold, the denarii of silver, the Antoninians of bronze, and the sestertii of copper. The aureus and denarii retained their former weight and quality even during the reign of Antoninus Pius. The weight of the aureus was 7.9 grams, and the weight of the Antoninians was 2.96 grams. The silver content of the denarius was 94%. The Antoninians began to spread during the reign of Antoninus Pius. Their weight and silver content were smaller than the denarii, but their value was the same. Their weight was 29 grams, and their silver content was 80%. The coinage of Antoninus Pius was one of the most significant periods in Roman monetary history. The quality and weight of the coins preserved the stability of the Roman monetary system. Some examples of coins of Antoninus Pius: Aureus: portrait of Antoninus Pius, the goddess of peace, Pax on the reverse. Denarius: portrait of Antoninus Pius, coat of arms of the Roman Empire on the reverse. Antoninianus: portrait of Antoninus Pius, the the Roman army on the back. Sestertius: portrait of Antoninus Pius, the Roman people on the reverse. Coins of Antoninus Pius are still valuable numismatic rarities.