Antoninus Pius Sestertius, RIC III Antoninus Pius 1378A

Monetary and Denominational Context

During the Antonine era, the monetary system established by Augustus remained fundamentally intact, relying on a trimetallic structure of gold, silver, and copper alloys. Within this hierarchy, the sestertius stood as the premier large-format base-metal denomination, valued at four asses, two dupondii, or one quarter of a silver denarius. Sestertii were struck in orichalcum, a golden-toned brass alloy composed primarily of copper and zinc, which distinguished them visibly from the reddish pure copper of the as and the lower-denomination quadrans. Due to its substantial mass and diameter, the sestertius served as the core medium for major day-to-day cash transactions in Italian markets, retail purchases, tax payments, and regional military disbursements across the western half of the empire. Furthermore, its broad circular flan of more than thirty millimeters provided imperial authorities with an ideal visual platform. While precious-metal denarii and aurei carried the core ideological motifs to elite holders and legionaries, the sestertius reached ordinary urban citizens, shopkeepers, and provincial tradesmen, making it one of the most effective instruments of state-sponsored public communication in the ancient world.

Production Technology and Minting Operations

The entire imperial bronze output of this type was produced centrally at the principal mint of Rome. Operating under the administrative oversight of the imperial treasury and monitored by moneyers answerable to the emperor and the Roman Senate, the urban mint maintained strict standards of metallurgic control and flan preparation. Blanks were cast in individual disc moulds or dynamic gang moulds, then trimmed to eliminate casting sprues and adjust planchet weights before striking. The metallurgical composition of the sestertius in this period relied on cementation brass, where zinc vapor from calamine ore was infused into molten copper. Striking was performed by teams of mint workers using engraved iron or bronze dies: a lower die fixed into an anvil, which typically held the obverse portrait, and an upper punch die carrying the reverse figure of Laetitia, struck by a heavy sledgehammer. Die axis orientations at the Rome mint under Antoninus Pius show a strong tendency toward regular die alignment, frequently oriented at twelve o'clock or six o'clock, reflecting disciplined workshop procedures. Although official weight tolerances fluctuated, typical sestertii of Antoninus Pius struck between AD 145 and 161 cluster roughly around twenty-two to twenty-six grams with diameters between thirty-one and thirty-four millimeters.

Obverse Iconography and Imperial Portraiture

The obverse of RIC III Antoninus Pius 1378A is devoted to a dignified, draped bust of the young Faustina facing right. Roman gem-engravers and mint celators in the capital depicted her youthful features with high refinement, capturing her soft facial contours, prominent eyes, and aristocratic bearing. Her hair is rendered with great technical virtuosity, parted neatly and dressed into tightly waved horizontal crimps across the scalp, accented by fine individual ringlets or curls framing the temple and ear, while the long rear locks are drawn back and coiled into a braided chignon pinned low at the nape of the neck. This coiffure represents the classic youthful court style adopted following her marriage to Marcus Aurelius in AD 145 and preceding the more complex, higher-positioned chignons seen after her husband's accession as Augustus in AD 161. The drapery across her shoulders falls in soft, classical folds, emphasizing her modest domestic decorum and status as a Roman matron of the ruling domus.

Reverse Design and Allegorical Meaning

The reverse iconography depicts the personification Laetitia Publica standing draped, frontally oriented with her head turned gracefully to the left. In her right hand she extends a round vegetal wreath, while her left hand cradles or supports a long vertical sceptre resting near the ground. Laetitia embodies public joy, festive celebration, and civic prosperity, an ideological concept repeatedly invoked on imperial issues to mark momentous dynastic milestones, such as marriages, imperial births, or anniversary festivities. The wreath symbolized public festival and victory over misfortune, while the upright sceptre denoted imperial authority, majesty, and divine favour. Flanking Laetitia in the lower fields to left and right are the large capital letters S and C, representing Senatus Consulto. This formula formally asserted that the base-metal coinage was produced by decree of the Senate, an enduring legal convention from the Augustan Principate that honored constitutional tradition even as actual policy remained firmly under the emperor's direction.

Epigraphic Features and Inscriptions

The inscriptions on RIC III Antoninus Pius 1378A are cut in clear, standard Roman lapidary capitals and convey precise dynastic and public formulas. The obverse legend reads FAVSTINAE AVG PII AVG FIL, running continuously clockwise along the rim. Formulated in the dative case of dedication, Faustinae, this inscription records that the coinage was minted in honor of Faustina, designated Augusta and Daughter of Pius Augustus. By emphasizing her filial bond to the reigning sovereign Antoninus Pius, the legend confirmed her central role in the legal and biological continuity of the ruling dynasty. The reverse inscription reads LAETITIAE PVBLICAE, likewise framed in the dative case or genitive case of dedication, meaning To Public Rejoicing. It announces the shared communal happiness guaranteed by the imperial family's flourishing succession. The letters S C, positioned symmetrically in the left and right fields across the lower half of the flan, confirm the formal senatorial authorization of the brass issue.

Typological Development and Chronological Context

RIC III Antoninus Pius 1378A fits within the broader series of bronze issues struck under Antoninus Pius between AD 145 and 161 celebrating the dynastic status of Faustina the Younger. Faustina received the title Augusta in AD 147 following the birth of her first child with Marcus Aurelius, Domitia Faustina. Consequently, issues bearing the title Augusta alongside PII AVG FIL belong securely to the period spanning AD 147 through Antoninus Pius's death in March AD 161. Within this bracket, numismatists including Strack and Mattingly observed stylistic shifts in Faustina's hairstyle: earlier portrait types from AD 147 through approximately AD 152 favor a lower chignon with crisp wave bands, whereas subsequent issues progressively alter the placement of the hair bun and forehead curls. The reverse type of Laetitia holding a wreath and sceptre appears in both brass sestertii and smaller middle bronzes such as dupondii and asses, sharing common thematic programs that celebrated the fertility, stability, and joyful prosperity of the Antonine golden age.

Circulation Patterns and Archaeological Recovery

Sestertii of the Antonine era enjoyed extensive and long-lasting circulation across the Roman world. Because base-metal coinages were struck primarily for domestic and provincial commerce rather than high-level diplomatic remittances, this sestertius circulated widely through Italy, the Gallic provinces, the Rhine and Danube frontiers, and Roman Britain. Site-find assemblages and river deposits demonstrate that Antonine sestertii frequently remained in active commercial use for several decades, often continuing to circulate well into the third century AD until the severe debasement of the silver coinage and subsequent inflationary crises disrupted the traditional bronze denominations. Many recovered specimens show signs of prolonged wear, countermarking, or corrosion caused by aggressive agricultural soils. Hoard evidence from Roman military camps and urban settlements confirms that issues bearing the portrait of Faustina the Younger were accepted alongside older Julio-Claudian, Flavian, and Trajanic sestertii without distinction, provided their weight and recognizable metallic integrity were maintained.

References

1. Coins of the Roman Empire in the British Museum. Vol. IV: Antoninus Pius to Commodus. pp. 377-380
2. RIC III Antoninus Pius 1378A in Online Coins of the Roman Empire. ric.3.ant.1378A
3. The Roman Imperial Coinage. Vol. III: Antoninus Pius to Commodus. p. 165, no. 1378A
4. Untersuchungen zur romischen Reichspragung des zweiten Jahrhunderts. Teil III: Die Reichspragung zur Zeit des Antoninus Pius. no. 1205