Gallienus Antoninianus RIC V Gallienus 575a: Subtype 2

Monetary Context and the Crisis of the Third Century

The antoninianus, or double denarius, formed the core of the Roman imperial monetary system during the mid third century AD. Initially introduced by Caracalla in AD 215 as an argentiferous radiate coin containing approximately one and a half times the silver of a contemporary denarius, the denomination suffered continuous metallurgical debasement across successive administrations. By the onset of Gallienus's sole reign in AD 260, following the disastrous capture of his father and co-emperor Valerian I by the Persian king Shapur I, the Roman monetary system faced an existential crisis. Gallienus inherited a fragmented empire contested by the breakaway Gallic Empire in the west and regional commanders across the eastern frontier. To maintain the payment of the imperial legions and finance ongoing military campaigns across the Danubian and Alpine frontiers, the imperial government accelerated the debasement of the antoninianus. Silver fineness plunged precipitously, leaving the coins as billon compositions that frequently possessed less than five percent silver by weight, often supplemented by a fleeting chemical surface blanching or dipping in silver-rich solutions to mimic high-purity precious metal. Coins produced under the classification of RIC V Gallienus 575a: Subtype 2 represent this severely depreciated monetary standard. The massive scale of antoninianus production crowded out remaining denominations, such as the bronze sestertius and silver denarius, leaving the billon radiate as the practically ubiquitous medium of transactional commerce and state expenditure throughout the Roman provinces.

Establishment and Operation of the Siscia Mint

The production of RIC V Gallienus 575a: Subtype 2 is assigned by numismatic consensus to the mint of Siscia, situated in modern Sisak, Croatia. Historically, imperial coinage had been heavily concentrated at Rome, with supplementary emissions produced at auxiliary centers such as Antioch, Mediolanum, and Lugdunum. As strategic pressures increased along the Illyrian and Balkan frontiers, transport of cash to mobile field forces became increasingly precarious and slow. Gallienus resolved this operational challenge by establishing an active mint facility at Siscia around AD 262 to 264. Siscia occupied an advantageous geopolitical and logistical hub on the Sava River, allowing rapid coin distribution to legions defending the middle Danube against Germanic and Sarmatian incursions. Early Siscan issues, including catalogue series 575a, are recognized for their robust, regional engraving style, which contrasts distinctly with the products of Rome and Mediolanum. Die cutters at Siscia produced broad, neatly centered portraits with distinct eye and hair treatment. In this initial phase of the mint's operation, officina marks were not consistently applied in the field or exergue of every issue, rendering typographic, stylistic, and hoard linkages essential for assigning un-marked strikings to Siscia. Production relied on manual striking between engraved bronze or iron dies, with blanks prepared by casting or flan-flattening techniques that occasionally produced irregular flan edges and fissures.

Obverse Iconography and Subtype Distinction

The obverse of RIC V Gallienus 575a: Subtype 2 features the radiate bust of Gallienus facing right, presented with distinctive imperial drapery. The radiate crown, originally introduced under the Julio-Claudian emperors to signify deification and later adopted on imperial coins to visually distinguish the double denomination from the single unit, sits prominently atop the emperor's curls. The hair is rendered in orderly rows of stylized locks framing the temples, accompanied by a closely cropped beard characteristic of Gallienus's mature portraiture. In modern typology, the defining feature of Subtype 2 is the drapery visible across the shoulders and chest. In the foundational typology of Roman Imperial Coinage Volume V, Part 1, Percy H. Webb segregated the variants of catalogue number 575a according to bust treatment. While Subtype 1 typically presents the emperor's bust with cuirass or bare neck variations depending on specific die preparation, Subtype 2 specifically isolates the radiate, draped bust right. This drapery, representing the paludamentum or imperial cloak gathered over the shoulder, evokes civil and ceremonial leadership alongside military command. The die engraving at Siscia imparts a composed, dignified expression to the portrait, reflecting official court portrait models transmitted from the imperial center to provincial mint masters.

Reverse Design and the Symbolism of Pax

The reverse design of this subtype features Pax, the Roman personification of peace and stability, standing draped and facing left. In her extended right hand she holds an olive branch, the universal classical symbol of reconciliation, tranquility, and cessation of hostilities. In her left arm she cradles a long transverse or vertical sceptre, denoting divine sovereignty and legislative authority. Her garments fall in vertical folds toward her feet, executed with classical restraint by the Siscan die engravers. Pax was among the most frequently invoked reverse personifications of the third century AD, recurring systematically across virtually all active imperial mints. Within the specific political context of Gallienus's sole reign, the proclamation of peace was deeply ideological and programmatic rather than descriptive of contemporary geopolitical reality. Confronted with chronic border wars against the Alamanni, Goths, and Heruli, and faced with the loss of territorial control over Gaul and Palmyra, the imperial administration utilized the Pax motif to reassure the Roman citizenry and soldierly corps of the emperor's restorative mission. By claiming the patronage of Pax, the regime framed its defensive military maneuvers not merely as violent engagements, but as the essential mechanisms required to re-establish universal Roman tranquility and divine order.

Epigraphy and Legend Structure

The epigraphy of RIC V Gallienus 575a: Subtype 2 is concise and functional, reflecting the standardized abbreviations developed for mid-third-century radiate coinage. The obverse carries the legend GALLIENVS AVG, inscribed continuously along the rim beginning at the lower left and terminating at the lower right. This inscription incorporates the emperor's single personal name alongside the fundamental imperial title Augustus (abbreviated AVG), omitting the extended consular, tribunician, and pontifical honorifics that characterized earlier imperial coinage. This brevity was necessitated partly by the diminishing flan sizes of late radiate issues, which left insufficient perimeter space for expansive titles, and partly by the need for immediate, unambiguous recognition of the sovereign authority backing the currency. The reverse inscription reads PAX AVG, representing an abbreviation of Pax Augusti, or the Peace of the Augustus. This grammatical formulation directly associates the personification of peace with the person and fortune of the living emperor. The lettering on Siscan dies is typically clear and sharply carved, displaying upright capital letters with delicate serifs, distinguishing it from the often hurried, irregular lettering found on contemporary products of the Rome mint.

Typological Classification and Chronological Placement

Within modern numismatic frameworks, this issue is catalogued under the reference RIC V Gallienus 575a: Subtype 2, following Percy H. Webb's classification in Roman Imperial Coinage and its updated digital cataloguing within the Online Coins of the Roman Empire (OCRE) system. The overarching type 575 in RIC V encompasses several sub-varieties distinguished primarily by reverse field markings, officina signatures, and minor bust drapery or armour treatments. Subtype 2 specifically denotes the radiate and draped bust right without elaborate field letters. Chronologically, this emission falls securely within Gallienus's sole reign, spanning the period from AD 260 to his assassination in AD 268. Because the mint of Siscia was not active from the very beginning of Gallienus's independent rule, specialized studies of the mint's opening by scholars such as Ludwik Gorecki date the start of significant regular production at Siscia to approximately AD 262 to 264. Consequently, type 575a represents part of the foundational output of Siscia during the middle to late 260s AD, predating the highly standardized, numbered officina series that characterized the mint under Claudius II Gothicus, Aurelian, and Probus.

Circulation, Hoard Evidence, and Modern Preservation

Once released into military payroll and imperial expenditure streams, billon antoniniani of Gallienus from Siscia circulated broadly across the central and western provinces of the Roman Empire. Heavy concentrations of these radiates have been recovered in Danubian and Balkan military zones, illustrating their intended primary function as local garrison payments. Due to rampant inflation and successive reductions in coin weight and fineness culminating in the monetary reforms of Aurelian in AD 274, older billon antoniniani were heavily hoarded. Radiates of Gallienus's sole reign frequently appear in massive third-century European savings hoards, such as the Cunetio and Normanby hoards in Roman Britain, as well as continental assemblages throughout the Rhine and Danube basins. Because the alloy of these coins contained high percentages of base copper and tin, extant specimens often demonstrate characteristic corrosion patterns, including localized bronze disease, cuprite encrustation, and the near-total loss of the fragile original surface silvering. Well-preserved specimens of RIC V Gallienus 575a: Subtype 2 displaying crisp drapery, complete legends, and intact flans are valuable diagnostic pieces for assessing early Siscan die production and regional coin distribution patterns.

References

1. La première émission de l'atelier de Siscia sous le règne de Gallien. Revue Numismatique 23, pp. 86-104
2. Coinage in the Roman Economy, 300 B.C. to A.D. 700. pp. 126-157
3. Coining Images of Power: Patterns in the Representation of Roman Emperors on Imperial Coinage, A.D. 193-284. pp. 195-224
4. Online Coins of the Roman Empire: RIC V Gallienus 575a: Subtype 2. ric.5.gall(2).575a.2
5. The Roman Imperial Coinage, Volume V, Part 1: Valerian to Florian. p. 177, no. 575a