Antoninus Pius Bronze Sestertius RIC III Antoninus Pius 843

Monetary Context and Denominational Function

During the reign of Antoninus Pius (138 to 161 AD), the sestertius served as the principal large-format base-metal denomination of the Roman monetary system. Introduced in its imperial form by Augustus, the sestertius was nominally struck in orichalcum, a golden-toned copper-zinc brass alloy that distinguished it in appearance and value from pure copper denominations such as the as. Within the imperial tariff structure, one sestertius equaled two radiate dupondii, four asses, or eight semisses, while four sestertii comprised a single silver denarius, and one hundred constituted an aureus. Because of its substantial weight, expansive diameter, and high purchasing power relative to everyday small change, the sestertius was indispensable for market commerce, civic accounting, tax collection, and military pay distributions. The physical scale of the flan made it an exceptionally effective vehicle for imperial public communication. Unlike everyday fractional copper, which conveyed localized or simpler emblems, the sestertius bore elaborate ideological compositions accessible to all strata of society. RIC III Antoninus Pius 843 was produced at a mature phase of the reign, reflecting monetary stability, steady mint output, and an uncompromised standard of base-metal coinage that persisted throughout the middle of the second century AD.

Production Technology and Mint Organization

The entire regular production of base-metal imperial coinage under Antoninus Pius was centralized at the mint of Rome. The imperial workshop employed specialized guilds of die-cutters, blank preparation workers, aligners, and hammerers. Flans for sestertii were cast individually in open molds or produced via sheet-cutting methods before undergoing annealing to ensure sufficient ductility. Striking occurred while blanks were heated, requiring substantial physical force from heavy two-man hammer teams to impress the deep intaglio relief of the dies into the dense brass. Die alignment for the Rome mint during this period was predominantly regular, adhering to a strict six o'clock (downward) or twelve o'clock (upward) axis, characteristic of organized mechanical coin production under the second-century bureaucracy. Metallurgical analyses of sestertii from the Antonine period demonstrate a deliberate, though gradually diminishing, zinc content in the orichalcum alloy, often balanced by minor lead additions to improve the fluidity of the metal during striking. Standard weight norms for sestertii during this period centered roughly around twenty-five to twenty-eight grams, with broad flan diameters typically falling between thirty-one and thirty-four millimeters, though individual specimens exhibit expected operational variance from casting irregularities and flan trimming.

Obverse Iconography and Imperial Portraiture

The obverse of RIC III Antoninus Pius 843 bears a mature, laureate head of Antoninus Pius facing right. The portraiture is rendered in the characteristic classical style developed by Rome mint engravers during the 140s AD. Rejecting the more idealized, Hellenizing youthfulness of Hadrian, the official imagery of Antoninus emphasized continuity, serene majesty, and philosophical maturity. The emperor is depicted with neatly combed waves of hair held by a laurel wreath tied at the nape of the neck with fluttering ribbons, accompanied by a well-groomed, closely cropped beard that conforms to the standard second-century senatorial aesthetic. Facial features typically present a strong aquiline nose, defined brow, and calm expression, projecting gravitas and temperate governance. As an unadorned head without drapery or cuirass, the portrait adheres to the civic tradition of early Antonine coinage, highlighting the emperor as a premier citizen rather than an aggressive military commander. The surrounding legend starts at the lower left and runs clockwise along the border of fine dots, framing the imperial bust with balance and formal precision.

Reverse Iconography and Religious Symbolism

The reverse iconography of RIC III Antoninus Pius 843 depicts the emperor standing toward the left, engaged in a solemn ritual sacrifice. He is dressed in traditional Roman civil attire, draped in a toga with his head occasionally veiled (capite velato) according to customary sacral practices. In his extended right hand, Antoninus holds a patera, a shallow libation dish, from which he pours an offering over a lit tripod brazier placed on the ground before him. His left arm rests straight at his side, maintaining a calm, restrained posture that reflects classical composure. The scene represents a foundational element of Roman state religion, the performance of vows and public sacrifices on behalf of the empire's welfare (salus reipublicae). By depicting the emperor personally attending the sacrificial fire, the coin reinforces his role as Pontifex Maximus, the supreme head of the college of priests. This visual program conveyed to the Roman populace that the peace and prosperity of the realm were safeguarded through pious devotion and strict adherence to ancestral religious customs (mos maiorum).

Epigraphy and Titulature Analysis

The inscriptions on RIC III Antoninus Pius 843 provide exact chronological markers and explicit ideological framing. The obverse legend reads ANTONINVS AVG PIVS P P TR P XI, presented without word dividers. This expands to Antoninus Augustus Pius, Pater Patriae, Tribunicia Potestate Undecimum. The title Augustus asserts his supreme constitutional status, while Pius commemorates his filial devotion in securing divine honors for his adoptive father Hadrian. Pater Patriae, Father of the Fatherland, conveys paternal protection over Roman citizens. The critical dating element, TR P XI, designates his eleventh conferral of tribunician power, which commenced around December 147 AD and extended into late 148 AD. The reverse legend is concisely stated as COS IIII, expanding to Consul Quartum, recording that the emperor was serving his fourth consulship, a dignity he assumed on January 1, 145 AD and held throughout the remainder of his life without taking a fifth. In the left and right reverse fields sits the monumental senatorial formula S C, for Senatus Consulto, signifying that the base-metal issue was struck under formal senatorial authority, preserving an Augustan administrative tradition.

Typological Classification and Chronological Placement

Within the system of modern numismatic classification, RIC III Antoninus Pius 843 occupies a specific place in the chronological sequence established by Harold Mattingly and Edward Sydenham. In the original 1930 volume of The Roman Imperial Coinage, the type was classified under the issues of 147 to 148 AD on the basis of the TR P XI tribunician formula. Later chronological refinements by Wolfgang Szaivert in his Moneta Imperii Romani study corroborated this window, attributing the issue to his emission series for 148 AD. The type must be carefully distinguished from earlier and later sacrificial issues of Antoninus Pius. For instance, similar reverse compositions showing the emperor sacrificing over a tripod were struck under TR P COS III (140 to 144 AD), TR P XII (148 to 149 AD), and during the decennalian and vicennalian celebrations. RIC 843 is differentiated strictly by the exact combination of obverse legend ANTONINVS AVG PIVS P P TR P XI, the right-facing laureate head, and the unadorned reverse legend COS IIII accompanied by S C in the field.

Circulation Patterns and Monetary Life

Once released from the mint of Rome, sestertii of RIC 843 entered circulation across the western provinces and the Italian heartland, where brass and copper coins were the dominant instruments for daily trade. Archaeological excavation data and recorded hoards throughout Roman Britain, Gaul, the Rhine frontier, and the Danubian provinces frequently include sestertii of Antoninus Pius, testifying to their massive output and long operational lifespan. Because the base-metal coinage of the High Empire maintained substantial intrinsic and fiduciary trust, sestertii remained in active circulation for decades. Many Antonine sestertii continued to change hands through the Severan period and into the mid-third century AD, often showing severe wear, softening of relief, or countermarks from subsequent administrations before being removed from the money supply during the inflationary collapse of the 260s AD. The durable orichalcum alloy withstood long-term mechanical abrasion, allowing the central religious messaging of the emperor sacrificing over a tripod to remain recognizable to users long after the initial issue year of 147 to 148 AD.

References

1. Coins of the Roman Empire in the British Museum, Vol. IV: Antoninus Pius to Commodus. pp. 280-282
2. Online Coins of the Roman Empire: RIC III Antoninus Pius 843. RIC III Antoninus Pius 843
3. The Roman Imperial Coinage, Vol. III: Antoninus Pius to Commodus. p. 132, no. 843
4. Die Münzprägung des Kaisers Antoninus Pius (Moneta Imperii Romani 18). MIR 18, emission 148 AD