Marcus Aurelius Orichalcum Sestertius, RIC III Marcus Aurelius 963

Monetary Context and Denominational Function

During the Antonine period, the sestertius occupied a central position within the Roman imperial monetary system as the premier high-denomination copper-alloy coin. Valued at one-quarter of a silver denarius or four copper asses, the sestertius was predominantly struck from orichalcum, a golden-toned copper-zinc brass alloy prized for its bright appearance and substantial heft. Under Marcus Aurelius, the imperial treasury maintained the traditional weight standard established under the early Principate, though slight variations in flan thickness and alloy purity occurred across mass production batches. The broad surface area of the sestertius flan, routinely measuring over thirty millimeters in diameter, provided Roman authorities with an exceptional vehicle for visual messaging. Unlike smaller silver or bronze denominations where narrative imagery was necessarily compressed, large brass sestertii allowed engravers to execute complex multi-figure historical compositions. Issued amidst the severe financial stresses caused by the northern border wars and the internal disruption of the Antonine Plague, this denomination acted both as practical currency for substantial everyday marketplace transactions and as military compensation, simultaneously circulating public announcements of imperial vigilance and martial dedication directly to citizens, traders, and soldiers throughout the empire.

Mint Organization and Die Production

All official specimens of RIC III Marcus Aurelius 963 were produced by the central imperial mint in the city of Rome, which exercised exclusive control over the casting and striking of senatorial bronze coinage in this period. Production of orichalcum sestertii required meticulous logistical coordination, beginning with the smelting of copper and zinc calamine ore to produce standardized flans. Blanks were cast in moulds, trimmed of sprues, and heated prior to striking between hardened iron or bronze dies. The die cutters at Rome demonstrated high artistic proficiency, utilizing carefully measured relief to capture the fine features of the emperor's mature portrait and the dynamic movement of the marching soldiers. Striking large brass flans demanded considerable manual force, often requiring several strikes of heavy sledgehammers held by teams of mint workers. Because dies experienced intense stress when transferring deeply incised relief to dense brass, mechanical wear and die breaks were frequent occurrences. Mint personnel routinely paired single obverse dies with multiple reverse dies as reverses deteriorated faster under the direct impact of the hammer. The reverse field retains the traditional senatorial mark SC (Senatus Consulto), reflecting the enduring constitutional fiction that bronze coinage was sanctioned by decree of the Roman Senate, even though operational and thematic direction emanated entirely from the imperial administration.

Obverse Design and Iconography

The obverse of this sestertius presents the mature portrait of Marcus Aurelius facing right, depicted with a laurel wreath tied at the nape of his neck with falling ribbon ties. In accordance with Antonine court style and Stoic philosophical practice, the emperor is shown with an abundant head of curly hair and a full, carefully groomed beard. The portrait captures the sovereign in middle age, balancing the dignified sobriety expected of an imperial philosopher with the regal authority required of the supreme commander. The die carving exhibits refined plastic modeling in the treatment of facial musculature, the prominent brow, and the disciplined expression of the eyes. Encircling the bust is the imperial legend M ANTONINVS AVG TR P XXIII, rendered in neat capital letters read clockwise from the lower left. The presence of the laurel wreath immediately signals imperatorial triumph and sacred protection, while the absence of a military cuirass or paludamentum on this standard bust variety focuses attention directly on the sacred person of the Augustus. Die studies across related Antonine bronze issues confirm minor stylistic variations in the rendering of curls, ribbon angles, and flan centering, all conforming to the established typographic conventions of the Rome mint's chief engravers.

Reverse Iconography: The Profectio Scene

The reverse composition provides a vivid and crowded narrative representation of the ceremonial departure known as the profectio. In the center of the design, Marcus Aurelius appears in full military attire, mounted upon a spirited horse prancing toward the right. The emperor holds a spear horizontally or obliquely in his right hand, poised as an active leader taking the field in defense of Rome. Preceding the equestrian figure is an armed Roman soldier marching forward to the right, glancing backward toward his sovereign while leading the vanguard. Following immediately behind the horse are three additional infantry soldiers, one of whom clearly carries a military spear, depicted closely grouped to form an escorting rearguard. Beneath the horse and in the field flanking the figures, the letters S and C appear to validate senatorial authority. The profectio ceremony was an established religious and military ritual celebrating the emperor's formal exit from Rome to assume personal command of an army on active campaign. Rather than depicting allegorical personifications such as Victoria or Pax, the type illustrates actual operational duty, reassuring Roman audiences that the princeps was physically departing to confront the Germanic and Sarmatian tribes who had broken through the Danubian limes into northern Italy.

Epigraphic Analysis and Imperial Titulature

The inscriptions on both faces of RIC III Marcus Aurelius 963 provide exact chronological markers and explicit ideological framing. The obverse legend reads M ANTONINVS AVG TR P XXIII, expanding to Marcus Antoninus Augustus, Tribunicia Potestate XXIII. This formula references his legal adoption into the Antonine dynasty, his supreme imperial title, and his twenty-third renewal of the tribunician power, an office traditionally renewed annually on December 10. The reverse legend carries the concise military inscription PROFECTIO AVG COS III, accompanied by S C in the lower fields. This expands to Profectio Augusti, Consul Tertium, Senatus Consulto. The phrase Profectio Augusti explicitly announces the formal departure of the emperor on a military expedition. The consular notation COS III refers to Marcus Aurelius having entered his third consulship in AD 161, a permanent title retained for the remainder of his life since he took no further ordinary consulships. The letters SC reinforce the traditional constitutional sanction of the Senate for bronze issues. Epigraphically, the lettering is executed in classic Roman square capitals with disciplined serif terminations, well-proportioned curves, and standardized spacing adapted to the circular circumference of the bronze flan.

Chronology and Typological Position

The precise date of issue for RIC III Marcus Aurelius 963 is established by the combination of the emperor's twenty-third tribunician term (TR P XXIII) and the historical circumstances surrounding the Marcomannic Wars. Tribunician year XXIII ran from December 10, AD 168 through December 9, AD 169. This narrow window corresponds to a dramatic turning point in Roman imperial history. Following the unexpected death of his co-emperor Lucius Verus early in AD 169 at Altinum, Marcus Aurelius returned briefly to Rome to oversee the deification of his brother and stabilize public morale. By the autumn of AD 169, the emperor prepared to depart Rome once more for the Danubian front, undertaking the protracted campaigns that would occupy the majority of his remaining reign. While Mattingly and Sydenham grouped related profectio types across both co-emperors in the initial volumes of Roman Imperial Coinage, specimens carrying solely the name of Marcus Aurelius with TR P XXIII were struck between late 168 and late 169, primarily marking his renewed departure as sole Augustus. This sestertius type forms an interconnected typological family with contemporaneous silver denarii and gold aurei bearing related profectio themes, although the expansive physical format of the sestertius enabled the unique inclusion of the four supporting soldiers omitted on smaller denominations.

Circulation and Archaeological Distribution

Sestertii of the Antonine era enjoyed extensive and prolonged circulation throughout the Roman Empire, remaining functional currency for decades after their initial manufacture. Because sestertii represented substantial intrinsic value in base metal and held a high face value within retail markets, they circulated intensely along primary military roads, major urban centers, and garrison settlements along the Rhine and Danube frontiers. Hoard evidence and archaeological site finds across Roman Britain, Gaul, the Germanies, and the Balkan provinces reveal that brass sestertii of Marcus Aurelius circulated continuously well into the third century AD, often recovered in heavily worn or countermarked conditions alongside issues of the Severan dynasty. In everyday commerce, sestertii were used for paying market fees, settling rent contracts, purchasing grain and wine, and accumulating personal savings in ceramic vessels. As later third-century debasement reduced the silver content of the antoninianus and caused severe price inflation, early orichalcum sestertii retained physical utility due to their substantial mass, frequently remaining in local circulation pools until the comprehensive monetary reforms of Diocletian at the end of the third century AD rendered classical bronze denominations obsolete.

References

1. Coins of the Roman Empire in the British Museum, Vol. IV: Antoninus Pius to Commodus. Marcus Aurelius Sestertii AD 168-169
2. The Roman Imperial Coinage, Vol. III: Antoninus Pius to Commodus. pp. 290-293
3. Online Coins of the Roman Empire: RIC III Marcus Aurelius 963. RIC III Marcus Aurelius 963
4. Die Münzprägung der Kaiser Marcus Aurelius, Lucius Verus und Commodus (161-192). Wien 1986, Chronologische Typologie