Probus Antoninianus RIC V Probus 711

Monetary Context and the Aurelianic Radiate Standard

The coinage catalogued as RIC V Probus 711 belongs to the late third-century monetary system established by Emperor Aurelian in his sweeping reforms of AD 274. Following decades of severe fiscal debasement and runaway inflation during the Crisis of the Third Century, Aurelian sought to restore public faith in base-metal radiate currency by fixing the metallurgical standard of the radiate denomination, conventionally known in modern numismatics as the antoninianus. Under this stabilized framework, which Probus maintained throughout his reign from AD 276 to 282, these radiates were struck in billon composed of approximately five percent silver and ninety-five percent copper, alloyed with traces of tin and lead. The surface was artificially enriched through chemical blanching during blank manufacture to impart a deceptive, silvery appearance that wore away during prolonged circulation. The nominal tariff of the reform radiate was generally signified by the value mark XXI, representing twenty parts base metal to one part fine silver, or alternately denoting a fixed ratio of twenty sestertii to one antoninianus. Operating in an empire plagued by constant frontier warfare and provincial uprisings, Probus depended heavily on continuous outputs of billon radiates to disburse soldiers' pay, finance civic and defensive construction, and maintain market stability. Within this broader economic framework, the peace-themed issue of Siscia represents a standard circulating denomination issued under rigorous weight and purity controls, balancing military requirements with the ideological imperative to project financial and geopolitical security.

Production and the Siscia Mint Operations

The mint of Siscia, situated at modern Sisak in Croatia along the Sava River, held an indispensable strategic position for the Danubian defense network and became one of the most prolific imperial mints of the Illyrian soldier-emperors. During the reign of Probus, Siscia maintained multiple operational officinae, typically numbered from one to seven and designated by Greek letters (Alpha through Zeta) or Latin numerals. The mint was recognized for its exceptional die-engraving quality, deep striking relief, and expansive repertoire of specialized imperial bust types. Production of RIC V Probus 711 occurred under strict bureaucratic oversight, where dies were engraved by master artisans capable of executing intricate decorative armor, plumage on helmets, and consular embroidery. Flans were cast, blanched in an acidic bath to bring the silver content to the exterior, and subsequently struck using paired iron dies. Workshop designations appeared either within the left or right reverse fields or in the lower exergual line beneath the reverse groundline, frequently accompanied by the XXI value mark or mint identification elements. The output of Siscia during this emission was substantial, providing liquidity not only for regional civilian markets along the Sava and Drava valleys but primarily for the legionary camps deployed to pacify the Danubian limes and neighboring northern frontiers.

Obverse Iconography and Bust Variations

The obverse of RIC V Probus 711 is notable for its repertoire of elaborate left-facing busts, distinguishing it from the standard right-facing radiates commonly produced in the western mints. These left-facing compositions reflect Siscia's sophisticated artistic tradition, underscoring the complementary civilian, consular, and martial identities of the emperor. One major variant depicts Probus helmeted, radiate, and cuirassed, turned to the left, grasping a spear in his right hand and bearing a decorative round shield on his left shoulder. The helmet and shield highlight his status as an active field general and defender of the frontier. A second major variation presents the emperor wearing the trabea or imperial consular mantle, holding an eagle-tipped sceptre (scipio) in his right hand. This format highlights Probus's civilian magistracies, particularly his recurring imperial consulships, conveying legitimate senatorial dignity and majestic governance. A third variant features the emperor bare-headed save for the radiate crown, cuirassed, and turned left, at times seen from behind with a spear and shield, or holding the spear alone across his chest. Across all variants, the radiate crown remains a central numismatic device, serving as the traditional signifier of the double-denarius value while associating the living ruler with Sol Invictus, the unconquered sun god whose cult was closely woven into imperial ideology.

Reverse Iconography of Pax Augusti

The reverse design of RIC V Probus 711 presents the divine personification Pax, embodying the tranquil state of civil harmony and victory achieved through imperial arms. Pax stands facing left, draped in flowing stola and palla, holding a branch of olive aloft in her extended right hand while cradling a transverse or vertical sceptre in her left arm. The olive branch was the universal Mediterranean symbol of peaceful resolution, reconciliation, and the cessation of conflict, while the long sceptre represented legitimate divine and imperial authority. This imagery was among the most durable allegorical motifs of imperial coinage, but in the context of Probus's reign, it carried urgent political resonance. Probus spent virtually his entire rule marching between Gaul, the Rhineland, the Danube, and the East to suppress foreign incursions and eliminate domestic usurpers. By invoking Pax Augusti, the coin asserts that the ruler's relentless campaigning was not waged for personal aggrandizement but to establish enduring imperial peace. In Siscia's execution of the design, the figure of Pax is rendered with slender proportions, delicate drapery folds, and clear attributes, maintaining high artistic standards across multiple die sequences.

Inscriptions and Epigraphic Analysis

The legends on RIC V Probus 711 adhere to the standardized epigraphic grammar of the late third century. The obverse is inscribed with the continuous legend IMP C M AVR PROBVS P F AVG, which reads outwardly around the border of dots. This legend abbreviates the imperial titulature: 'Imperator Caesar Marcus Aurelius Probus Pius Felix Augustus'. The initial title Imperator establishes his supreme military command; Caesar denotes his legitimate dynastic rank; Marcus Aurelius Probus preserves his official imperial nomenclature following his elevation; Pius and Felix characterize his devotion to duty and heaven-favored fortune; and Augustus crowns his constitutional standing as supreme sovereign. On the reverse, the inscription PAX AVGVSTI surrounds the standing figure of Pax. The genitive construction translates to 'The Peace of the Emperor', directly tying the abstract blessing of tranquil security to the person and deeds of Probus. In the exergue or field, Siscia's administrative markings include workshop designations such as Greek officina letters combined with XXI (such as XXIQ, XXI V, or individual officina marks), which provided institutional accountability for alloy compliance and batch volume during mass production.

Typology and Chronological Classification

Within the typology established in Roman Imperial Coinage Volume V, Part II, Percy H. Webb grouped the antoniniani of Siscia into broad chronological emissions. Later specialized studies by Karl Pink in 1949 and subsequent updates by Sylviane Estiot have refined the sequence of Siscia's issues into distinct series based on bust styles, mintmark arrangements, and consular dates. RIC V Probus 711 encompasses the Siscan radiate type bearing the IMP C M AVR PROBVS P F AVG obverse formula and the left-facing busts paired with the PAX AVGVSTI reverse. In Karl Pink's chronological arrangement, Siscia's production is divided into multiple emissions spanning AD 276 to 282. The introduction of elaborate left-facing military and consular busts became prominent during the middle and later emissions of the mint, notably coinciding with Probus's visits to the Danubian theater and his successive consulships (such as his second consulship in AD 278, third in AD 279, and fourth in AD 281). Because dies carrying the PAX AVGVSTI reverse were periodically paired with multiple obverse varieties across distinct officinae, RIC V Probus 711 functions as an overarching type designation encompassing these specific bust variations rather than a single static die pair.

Circulation, Hoard Evidence, and Survival

Antoniniani of the RIC V Probus 711 type enjoyed widespread circulation across the European provinces of the Roman Empire, as confirmed by comprehensive hoard documentation and river finds. Siscia's heavy output circulated along military corridors through Pannonia, Moesia, Dacia, and northern Italy, but these coins were also transported into Gaul and Britain by legionary transfers and interprovincial trade. Significant numbers of billon radiates from Probus's Siscan issues appear in major western hoards such as the Normanby, Cunetio, and La Venèra hoards. In these deposits, Siscan coins are often preserved in substantial quantities alongside issues of Rome, Ticinum, Lugdunum, and Cyzicus. While the fragile silver wash was readily abraded by circulation wear and acidic soil environments, many surviving specimens retain significant portions of their original silvering, particularly those hoarded shortly after striking. Because of the vast scale of imperial production, specimens of this general type survive in sufficient numbers for modern study, though specific officina letters and elaborate consular bust variants exhibit considerable variation in frequency.

References

1. L'atelier de Siscia sous Probus (276-282 ap. J.-C.). pp. 199-234
2. Online Coins of the Roman Empire: RIC V Probus 711. RIC V Probus 711
3. Der Aufbau der römischen Münzprägung in der Kaiserzeit VI/1: Probus. Siscia issues
4. The Roman Imperial Coinage, Volume V, Part II. p. 93, no. 711