Sabina Sestertius, RIC II, Part 3 (second edition) Hadrian 2558

Monetary Context and Denominational Role

During the reign of Hadrian, the sestertius represented the principal base-metal denomination of imperial Roman currency. Manufactured from orichalcum, a golden-toned copper alloy predominantly composed of copper and zinc, the sestertius held a nominal value of four asses or one quarter of a silver denarius. Its substantial module and weight made it an ideal vehicle for state messaging, as large-format flans provided Roman die cutters with ample space for intricate portraits and nuanced religious personifications. Unlike imperial gold and silver, which carried direct imperial administrative weight, official bronze and brass denominations retained the traditional formula Senatus Consulto, abbreviated as S C, signifying formal senatorial sanction of the coinage. In the wider economic system of the early second century AD, sestertii facilitated vital mid-tier market exchanges, military payments, administrative expenditures, and inter-provincial commerce. Coinage struck in the name of the Augusta fulfilled a double function: it injected requisite liquidity into the Roman economy while asserting the prominence, dynastic legitimacy, and public virtues of the imperial consort.

Production Standards and Mint Organization

This sestertius type was produced exclusively at the central imperial mint in Rome. Mint operations under Hadrian were highly specialized, staffed by skilled engravers, flan casters, aligners, and hammerers under the supervision of equestrian officials. Production of sestertii entailed casting thick orichalcum planchets that were subsequently hammered between hand-cut iron or bronze dies. Hadrianic sestertii typically adhere to a theoretical weight standard centering around twenty-four to twenty-eight grams, with a module measuring approximately thirty-one to thirty-three millimeters, though individual specimens exhibit minor variations typical of ancient mechanical striking. Die alignment at the Rome mint was generally oriented near twelve o'clock or six o'clock, reflecting disciplined workshop oversight. The alloy choice of orichalcum was deliberately maintained for the sestertius and dupondius to distinguish them visually and economically from the pure red copper asses. The metallic composition, visual artistry, and tight quality controls evident in RIC 2558 demonstrate the maturity of the Rome mint during the late Hadrianic period.

Obverse Iconography and Imperial Portraiture

The obverse of the coin features a right-facing bust of Vibia Sabina, richly draped in imperial costume. Her portrait is adorned with a stephane or diadem, and her hair is arranged according to a distinct, late court style where the locks are drawn back smoothly over the head and bound into a long, formal queue trailing down the nape of the neck. This sophisticated coiffure emerged in the latter half of Hadrian's reign, marking a transition away from the elaborate, high-piled hair architecture popular under the Flavian and Trajanic eras toward a classical, idealized simplicity reminiscent of classical Greek statuary. The drapery folds across the shoulders are rendered with careful attention to textile depth and naturalistic movement. The portrait balances individual likeness with idealized imperial dignity, presenting the empress as an embodiment of matronly decorum, stability, and enduring dynastic fidelity within the imperial household.

Reverse Typology and Religious Symbolism

The reverse iconography portrays Vesta, the venerated Roman goddess of the hearth and guardian of state continuity, seated toward the left upon an ornamental throne or stool. In her extended right hand, she cradles the palladium, an archaic wooden statuette of Pallas Athena believed to have been rescued from Troy by Aeneas and preserved within the Temple of Vesta as a sacred pledge of Rome's eternal preservation. In her left hand, Vesta holds a long vertical sceptre, the universal symbol of divine authority and majesty. The senatorial decree formula, S C, is placed prominently in the exergue beneath the ground line. The choice of Vesta on coinage celebrating imperial women carried deep civic and ideological resonance. As protector of the domestic hearth and public safety, Vesta reflected the empress's domestic purity, maternal role within the commonwealth, and religious custody of traditional Roman values, thereby cementing the moral authority of Hadrian's principate.

Epigraphy and Titulature Analysis

The obverse inscription reads SABINA AVGVSTA HADRIANI AVG P P, beginning at the lower left and running continuously clockwise along the rim. This legend is historically significant for its explicit grammatical coupling of Sabina's title of Augusta with that of her husband, Hadrian, identified by the imperial titles Augustus and Pater Patriae. Hadrian accepted the honorific title Pater Patriae in AD 128, providing a definitive terminus post quem for coin series bearing this phrasing. The explicit mention of the emperor in the empress's title reaffirmed her status not merely as an autonomous Augusta, but as the legitimate consort of the supreme ruler and father of the fatherland. On the reverse, the legend is concise: the deity's name VESTA is engraved along the upper arc, clearly identifying the personification, while the senatorial authorization S C occupies the exergual space below the seated figure. The lettering exhibits the refined, seriffed epigraphy characteristic of the best mid-second-century Roman die cutting.

Typological Classification and Chronological Placement

In the revised classification of the second edition of Roman Imperial Coinage, this specific issue is designated as RIC II, Part 3 (second edition) Hadrian 2558, refining the older cataloguing schemes established by Harold Mattingly, Edward A. Sydenham, and Paul L. Strack. The type is securely situated within Hadrian's final emission phase, dated to approximately AD 133 to 135, shortly before Sabina's death around late AD 136 or early 137. This chronological assignment is established by the progression of Sabina's portrait styles, particularly the adoption of the queue hairstyle, and the consistent incorporation of Hadrian's title P P on her obverse legends from the early 130s onward. RIC 2558 is distinguished from related issues by the precise combination of the seated Vesta holding both the palladium and sceptre, the specific drapery and hair arrangement, and the exergual placement of S C rather than having the letters positioned across the reverse field. Unlike subsequent consecration issues that bear the posthumous legend DIVA SABINA, this type was struck during her lifetime.

Circulation, Wear Patterns, and Hoard Evidence

Sestertii of Sabina struck at Rome circulated widely across the European provinces, North Africa, and the Levant, integrating seamlessly into the general pool of Roman bronze currency. Because of their heavy brass composition and substantial purchasing power, sestertii remained in active circulation for decades, frequently surviving in circulation hoards well into the Severan era and the third century AD. Excavated examples from western sites in Britannia, Gallia, Germania, and the Italian peninsula frequently exhibit moderate to heavy wear, softening the fine details of Sabina's queue coiffure and Vesta's diminutive palladium. Over time, contact with varied soils and moisture produced patinas ranging from deep riverine dark brown to malachite green. The enduring physical survival of RIC 2558 in both stray finds and institutional hoard deposits attests to the massive scale of late Hadrianic bronze coin output and its sustained utility across generations of Roman commerce.

References

1. The Roman Imperial Coinage, Volume II, Part 3: From Hadrian to Antoninus Pius (AD 117-138), Hadrian. pp. 165-172, no. 2558
2. Coins of the Roman Empire in the British Museum, Volume III: Nerva to Hadrian. pp. 535-540
3. Online Coins of the Roman Empire: RIC II, Part 3 (second edition) Hadrian 2558. ric.2_3(2).hdn.2558
4. Untersuchungen zur romischen Reichspragung des zweiten Jahrhunderts, Teil II: Die Reichspragung zur Zeit des Hadrian. pp. 142-150