Antoninus Pius Sestertius RIC III Antoninus Pius 644

Monetary and Administrative Context

The sestertius represented the principal large-denomination brass or bronze coin within the Augustan monetary system, retaining its traditional tariff of four sestertii to one silver denarius and one hundred sestertii to an imperial gold aureus. Under the Antonine administration, the sestertius functioned as the primary vehicle for high-value daily retail trade, civic payments, and public distributions throughout the Roman Empire. Its broad copper-alloy flan made it an exceptionally effective platform for imperial messaging. While contemporary issues frequently promoted military victories, imperial charity, or personifications of virtues such as Moneta and Aequitas, the appearance of Janus on RIC III Antoninus Pius 644 highlighted traditional Roman religious foundations. In Roman tradition, Janus presided over beginnings, transitions, and the gates of peace. The reign of Antoninus Pius was celebrated by contemporary and later writers as a period of profound external peace and civic tranquility, making Janus a poignant symbol of domestic security and the preservation of traditional religious rites.

Production Standards and Minting

The issue was struck exclusively at the central imperial mint in Rome, which maintained strict administrative control over the production of official senatorial copper-alloy coinage during this period. The sestertii of Antoninus Pius were typically manufactured from orichalcum (a copper-zinc alloy often referred to in older numismatic literature as bronze or brass), which imparted a bright golden tone to freshly minted pieces. The blank flans were cast in open or two-part molds before being trimmed, heated, and struck between hand-engraved iron or bronze dies. Consistent with early Antonine standards, specimens of this type typically adhere to an average weight standard clustering between 25 and 28 grams, although individual surviving examples can fluctuate more broadly due to manufacturing tolerances and natural wear. Diameters generally range between 31 and 34 millimeters. Dies were aligned predominantly in an upright or inverted orientation (commonly die axis 6 or 12 o'clock), reflecting the careful alignment procedures of the Rome mint workshops during the 140s AD.

Obverse Iconography and Imperial Portraiture

The obverse presents a right-facing portrait of the emperor Antoninus Pius, depicted with a laurel wreath tied at the nape of the neck with fluttering ribbons. The portraiture belongs to the mature imperial style developed early in his reign, characterized by dignified, idealized facial features, closely cropped curly hair, and a neatly trimmed beard that aligns with contemporary Antonine aristocratic fashions. Unlike heavily militarized portraits of earlier or later reigns, the bust displays the emperor bare-shouldered or minimally draped at the neck truncation, projecting the serene, paternal demeanor associated with civil governance and religious devotion. The surrounding inscription is executed in formal Roman square capitals, carefully scaled to fit the outer rim of the coin.

Reverse Design and Religious Symbolism

The reverse iconography of RIC III Antoninus Pius 644 features the standing figure of Janus, rendered frontally with his characteristic two faces turned to the left and to the right. The god is draped in traditional vestments and holds a tall upright sceptre (hasta pura) in one hand, while his other hand typically rests at his side or holds a fold of drapery. In the field, the large letters S C (Senatus Consulto) flank the figure, certifying the traditional constitutional authorization of the Roman Senate for the striking of base-metal coinage. The depiction of Janus is relatively rare on imperial sestertii, where standing personifications of virtues far outnumber archaic deities of this class. Janus symbolized not only temporal progression and the opening of new eras but also the maintenance of universal peace, referencing the ritual closing of the doors of the Temple of Janus in the Roman Forum when the empire was free from war.

Inscriptions and Epigraphic Analysis

The obverse inscription reads ANTONINVS AVG PIVS P P, expanding to 'Antoninus Augustus Pius, Pater Patriae' (Antoninus Augustus, the Pious, Father of his Country). The inclusion of the title Pater Patriae, accepted by Antoninus Pius in AD 139, is standard for his bronze coinage from AD 140 onwards. The reverse legend is inscribed TR POT COS III, which expands epigraphically to 'Tribunicia Potestate, Consul Tertium' (invested with the Tribunician Power, Consul for the third time). Antoninus entered his third consulship on January 1, AD 140, a title that remained in his official titulature until he entered his fourth consulship in AD 145. The senatorial formula S C occupies the left and right fields of the reverse, reaffirming senatorial prerogative in public bronze production.

Typology and Chronological Placement

Catalogued as number 644 in Volume III of The Roman Imperial Coinage, this issue is securely positioned within the broad chronological window of AD 140 to 144, delimited by the emperor's third consulship (commencing in AD 140) and his fourth consulship (commencing on January 1, AD 145). Because the reverse legend does not record a specific tribunician regnal year number (such as TR P IIII or TR P V), the series cannot be pinned down to an individual calendar year within this span on epigraphic evidence alone. Related issues of this period explore archaic and traditional Italian religious cults, forming part of a conscious program under Antoninus Pius to re-emphasize the foundational myths and classical deities of Rome in the years leading up to the celebration of the city's nine-hundredth anniversary in AD 148.

Circulation Patterns and Archaeological Recovery

As the highest-denomination base-metal coin, sestertii such as RIC 644 circulated extensively throughout the central and western provinces of the Roman Empire, including Italy, Gaul, Britain, and along the Rhine-Danube military frontiers. Because of the substantial intrinsic value of heavy orichalcum pieces and the robust economic vitality of the mid-second century, sestertii remained in active circulation for decades, often staying in use until the late third century AD. Excavation finds and hoards from northwestern Europe and the Mediterranean basin demonstrate substantial surface wear on surviving specimens, attesting to repeated transactional use. Over generations of circulation, many of these heavy bronzes acquired rich green or dark brown patinas resulting from mineral interaction in diverse European soils.

References

1. A Catalogue of the Roman Coins in the British Museum. Antoninus Pius sestertii (AD 140-144)
2. Coins of the Roman Empire in the British Museum, Vol. IV: Antoninus Pius to Commodus. pp. 195-200
3. Online Coins of the Roman Empire: RIC III Antoninus Pius 644. ric.3.ant.644
4. The Roman Imperial Coinage, Vol. III: Antoninus Pius to Commodus. p. 113, no. 644