Antoninus Pius Silver Denarius RIC III Antoninus Pius 10a

Monetary Context and Denominational Function

The accession of Antoninus Pius in July 138 AD inherited a mature, stable monetary system derived from the Augustan and Flavian reforms, as modified under Trajan and Hadrian. The denarius served as the principal silver denomination across the Roman Mediterranean, functioning as the backbone for state expenditures, army salaries, imperial administrative payrolls, and inter-provincial commercial transactions. In late 138 AD, the silver denarius was struck at an average theoretical weight of approximately 3.2 to 3.4 grams, with an intrinsic silver fineness maintained at roughly 80 to 85 percent, matching the standard sustained through the latter years of Hadrian. Denarii circulated alongside brass sestertii and dupondii, copper asses, and gold aurei, valued tariffed at twenty-five denarii to the aureus and four sestertii per denarius. RIC III Antoninus Pius 10a was struck in the opening months of Antoninus's reign, serving to inject freshly minted coin into urban and military channels while announcing the new imperial administrative priorities of fairness, legitimate succession, and financial integrity.

Production and Mint Organization

All specimens corresponding to RIC III Antoninus Pius 10a were produced at the imperial mint of Rome, which held an effective monopoly on regular silver denarius production for the Western Empire. Operating under the administrative oversight of the equestrian procurator monetae and senatorial commissioners (tresviri monetales), the Rome mint was organized into distinct workshops or officinae. Silver planchets were cast in open ceramic or stone molds, carefully adjusted to ensure weight uniformity within bulk tallies, and subsequently heated before being hand-struck between engraved bronze or iron dies. Die axes for this issue predominantly cluster around the typical imperial standard of six o'clock (180 degrees) or twelve o'clock (360 degrees). The volume of output for this inaugural issue was relatively brief but intense, as the Rome mint worked rapidly to replace the late portraiture of Hadrian with the likeness and titles of the new emperor during the remaining months of 138 AD.

Obverse Portraiture and Style

The obverse of RIC III Antoninus Pius 10a presents a mature portrait of Antoninus Pius shown with his head bare, facing right. Unlike many later imperial emissions that consistently depict the emperor wearing a laurel wreath, this early type deliberately omits the laurel garland, continuing a tradition common in the opening phases of Antonine and late Hadrianic portraiture where the bare head accentuated civil modesty, filial pietas, and civilian virtue. The engraving exhibits the refined, classicizing Hellenistic realism characteristic of the late Hadrianic Rome mint engravers, detailing the emperor's short, curled beard, straight classical nose, and thoughtful expression. Variations exist across individual dies in the treatment of the hair curls, the exact angle of the truncation at the neck, and the spacing of the surrounding legend, though the bare-headed direction to the right remains constant across the type.

Reverse Iconography and Symbolism

The reverse iconography of RIC III Antoninus Pius 10a features the personification of Aequitas, represented as a draped female figure standing and facing left. In her lowered or outstretched right hand she balances a pair of scales, while in her left arm she cradles a horn of plenty (cornucopiae). Aequitas embodied the ideal of equitable dealing, fair distribution, and justice, particularly regarding the state's management of weights, market measures, the supply of grain, and monetary honesty. Paired with the cornucopiae, the scales emphasized that equitable governance and fair prices guaranteed material abundance for the populace of the empire. This symbolic program was carefully calculated at the start of the reign to assure senators, merchants, and plebeians alike that the change in princeps would maintain economic balance and benevolent, principled administration.

Epigraphy and Imperial Titulature

The inscriptions on RIC III Antoninus Pius 10a convey the precise political and constitutional sequence of 138 AD. The obverse reads IMP T AEL CAES HADRI ANTONINVS, standing for Imperator Titus Aelius Caesar Hadrianus Antoninus. This inscription emphasizes the emperor's formal adoption by Hadrian, incorporating both 'Aelius' and 'Hadrianus' into his public nomenclature. The reverse legend continues the imperial titulature with AVG PIVS P M TR P COS DES II, expanding to Augustus, Pius, Pontifex Maximus, Tribunicia Potestate, Consul Designatus II. The designation 'PIUS' reflects the cognomen granted to Antoninus by the Senate in late 138 AD, traditionally awarded for his filial devotion in securing the posthumous deification of Hadrian against senatorial opposition. The designation COS DES II (Consul Designatus for the second time) securely records that Antoninus had been nominated for his upcoming second consulship, which commenced on January 1, 139 AD, while TR P denotes his holding of tribunician power.

Typological Classification and Chronological Placement

Under the typological framework established by Harold Mattingly and Edward A. Sydenham in Roman Imperial Coinage (RIC III), type 10 is subdivided based on obverse portrait attributes, with 10a defined specifically by the bare head right, in contrast to variants presenting draped or laureate busts. Chronologically, RIC III Antoninus Pius 10a belongs entirely to late 138 AD. Antoninus succeeded Hadrian upon the latter's death on July 10, 138 AD. The inclusion of PIVS on the reverse indicates striking occurred after the senatorial bestowal of this epithet later that autumn. Concurrently, the formula COS DES II was valid only until Antoninus assumed his second consulship on January 1, 139 AD, when reverse legends shifted to COS II. Consequently, this type represents a tightly bounded struck window of roughly five months between August or September and December 138 AD, making it a critical benchmark for early Antonine numismatic chronology.

Circulation Patterns and Archaeological Evidence

Denarii of Antoninus Pius struck in 138 AD entered a massive imperial circulation pool that spanned the entire Roman world, from the military outposts of Britannia and the Rhine-Danube frontier to the urban centers of Italy, North Africa, and the Levant. Because of their sound weight and standard fineness, denarii of this issue circulated alongside late Flavian, Trajanic, and Hadrianic silver for decades. Hoard evidence from western Europe and the Danubian limes demonstrates that silver denarii from the early years of Antoninus Pius remained actively in commercial and hoarding circulation well into the early third century AD, until the massive debasements under Septimius Severus and Caracalla gradually drove them out of general use. Many surviving specimens show substantial wear from extensive circulation, while others were preserved in hoards concealed during the Marcomannic Wars under Marcus Aurelius.

References

1. Imperial Virtues on Roman Imperial Coinage. pp. 45-52
2. Coins and Power in the Roman World. pp. 110-128
3. Coins of the Roman Empire in the British Museum, Volume IV: Antoninus Pius to Commodus. pp. 3-5
4. Online Coins of the Roman Empire: RIC III Antoninus Pius 10a. ric.3.ant.10a
5. The Roman Imperial Coinage, Volume III: Antoninus Pius to Commodus. p. 27, no. 10a
6. Untersuchungen zur romischen Reichspragung des zweiten Jahrhunderts, Teil III: Die Reichspragung zur Zeit des Antoninus Pius. pp. 12-16