RIC III Antoninus Pius 785 Sestertius

Monetary Context and Denominational Role

During the mid-second century AD, the sestertius functioned as the principal large-format base-metal denomination of the Roman monetary system. Valued at one-quarter of a silver denarius or four copper asses, the sestertius played a critical dual role: it was an essential instrument for everyday high-value market transactions and served as the preeminent physical canvas for imperial political communication. Under the Antonine monetary administration, the denomination was struck in orichalcum, a golden-toned brass alloy composed primarily of copper and zinc. The large surface area of the sestertius provided the administration and the Senate with unmatched scope for detailed portraiture, elaborate thematic reverses, and explicit commemorative inscriptions. Within this economic framework, RIC III Antoninus Pius 785 served both fiscal needs and civic messaging, commemorating imperial vows associated with Antoninus Pius's decennalia while injecting substantial token currency into imperial trade networks.

Production Standards and Mint Organization

RIC III Antoninus Pius 785 was produced exclusively by the imperial mint at Rome, which held a functional monopoly over base-metal token coinage for the western and central empire. The production technique relied on preparing cast disc flans of brass that were subsequently struck by hand between engraved intaglio dies. The obverse die was fixed in an anvil while the reverse die was held by hand and struck with heavy hammers. Weight standards for sestertii during the mid-reign of Antoninus Pius generally aimed for a median modal range between 24 and 27 grams, though striking tolerances allowed individual specimens to fluctuate between roughly 21 and 30 grams without loss of face value. Typical diameters ranged from 30 to 33 millimeters. Alignment of the dies was commonly oriented in a regular or nearly regular six o'clock axis, consistent with standard Antonine mint practices in Rome.

Obverse Iconography and Imperial Titulature

The obverse of RIC III Antoninus Pius 785 presents a right-facing, mature portrait of Antoninus Pius, depicted with a laurel wreath tied at the back of the head. The portraiture belongs to the emperor's mature stylistic phase, characterized by carefully modeled, curling hair, a trimmed beard, and calm, restrained facial features typical of the Antonine classicizing style. The surrounding inscription reads ANTONINVS AVG PIVS P P IMP II, beginning at the lower left and running clockwise around the rim. The inclusion of P P (Pater Patriae) reflects his accepted honorific as Father of the Country, while IMP II marks his second imperatorial acclamation, granted originally after military successes in Britain during the early 140s AD and retained on coinage into the mid-to-late 140s AD.

Reverse Iconography and the Civic Crown

The reverse iconography of RIC III Antoninus Pius 785 is dominated by a substantial oak wreath, traditionally known in Roman state religion and public honors as the corona civica. Within this enclosing garland, the legend SECVND DECEM ANNALES COS IIII S C is arranged across four or five horizontal lines. The wreath itself is bound with ties at the base, displaying detailed foliage with distinct leaves and acorns. In Roman tradition, the civic crown was an archaic military decoration awarded to a soldier who saved the life of a fellow Roman citizen in battle. By adopting the wreath on imperial coinage alongside decennial vows, the imperial administration cast the emperor as the perpetual guardian and preserver of the Roman citizenry, emphasizing sustained internal peace and civic well-being.

Epigraphy and Inscriptional Formulas

The inscriptional framework of RIC III Antoninus Pius 785 unites imperial nomenclature on the obverse with a specific ritual formula on the reverse. The obverse legend ANTONINVS AVG PIVS P P IMP II condenses Antoninus Augustus Pius, Pater Patriae, Imperator II. On the reverse, the phrase SECVND DECEM ANNALES refers directly to the 'secundi decennales annales' or the celebrations marking the completion of the first decade and the entering into the second ten-year period of rule. COS IIII records the emperor's fourth consulship, assumed in January of AD 145, which remained his final consular tenure throughout his reign. The letters S C, abbreviating Senatus Consulto ('by decree of the Senate'), occupy the lower register within the wreath, reaffirming the traditional senatorial oversight of base-metal issues.

Typological Classification and Chronological Placement

Harold Mattingly and Edward A. Sydenham catalogued this specific issue as RIC III Antoninus Pius 785, classifying it within the fourth consular issue (COS IIII). While the titular parameters of COS IIII (AD 145 to 161) and IMP II provide broad legal termini, the thematic content of the reverse provides a much tighter chronological anchor. The decennalia of Antoninus Pius, marking the tenth anniversary of his accession in July AD 138, was celebrated in AD 147 and 148. Consequently, specialist numismatic corpora, including Paul Strack's Untersuchungen zur romischen Reichspragung and the British Museum catalogue, assign the striking of this issue specifically to circa AD 147 or 148, coinciding with the vota decennalia festivities rather than continuing across the entire consular period.

Circulation Patterns and Archaeological Context

As a principal denomination in high-volume production, sestertii of Antoninus Pius circulated extensively throughout the western and Danubian provinces, including Roman Britain, Gaul, the Germanies, and Pannonia, as well as the Italian heartland. Hoard evidence and excavation finds from military camps, frontier vici, and urban centers indicate that Antonine brass remained in active commercial circulation for decades after production, often continuing in use well into the third-century AD crisis until severe debasement of silver coinage rendered high-purity orichalcum pieces targets for hoarding and melting. Wear patterns on recovered specimens of RIC 785 frequently exhibit extensive edge wear and smoothed high points, reflecting prolonged transactional service before eventual loss or deliberate burial.

References

1. Coins of the Roman Empire in the British Museum, Vol. IV: Antoninus Pius to Commodus. pp. 278-280
2. The Roman Imperial Coinage, Vol. III: Antoninus Pius to Commodus. p. 126, no. 785
3. Online Coins of the Roman Empire: RIC III Antoninus Pius 785. ric.3.ant.785
4. Untersuchungen zur romischen Reichspragung des zweiten Jahrhunderts, Teil III: Die Reichspragung zur Zeit des Antoninus Pius. pp. 110-115