Gallienus Antoninianus, RIC V Gallienus 252: Subtype 2

Monetary Context and the Crisis of the Third Century

The antoninianus represented by RIC V Gallienus 252: Subtype 2 emerged during one of the most volatile monetary periods in Roman history. Following the catastrophic defeat and capture of Emperor Valerian I at Edessa in AD 260, his son Gallienus assumed sole authority over an empire besieged by external invasions and internal usurpations. The loss of territories to Postumus in Gaul and Odaenathus in Palmyra severely constricted the tax revenues available to the central government in Rome. Simultaneously, imperial military expenditures escalated rapidly, forcing the Roman mint to produce unprecedented volumes of coin to maintain army loyalty and secure essential frontier defenses. Under this relentless financial pressure, the antoninianus, originally introduced in AD 215 as a silver piece containing approximately fifty percent precious metal, experienced an unprecedented collapse in intrinsic value. During Gallienus's sole reign from AD 260 to AD 268, the silver purity plummeted from roughly twenty percent to less than five percent, with many late emissions falling below two percent fine silver. Metallurgical analyses demonstrate that these coins were composed primarily of copper and lead, enriched through pickling or silver wash techniques to give freshly minted blanks a transient silvery luster. RIC V Gallienus 252: Subtype 2 represents this late billon phase, where denomination value rested almost entirely on imperial decree rather than intrinsic metallic worth.

Production Standards and Rome Mint Operations

This coin subtype was produced exclusively at the primary imperial mint in Rome. Under Gallienus, the Rome mint underwent extensive structural reorganization to accommodate high-volume production, ultimately operating with up to twelve separate workshops or officinae. Mint workers prepared flans using cast copper alloy bars that were sliced, flattened, and chemically depleted of surface base metals to concentrate whatever trace silver remained on the exterior. Because speed of execution took precedence over careful craftsmanship, flans were frequently irregular in shape, uneven in thickness, and undersized relative to earlier third-century standards. Typical diameters for antoniniani of this class range between 17 and 21 millimeters, with weights fluctuating widely between 2.2 and 3.5 grams, although individual specimens often fall outside this median window. Strikers utilized hinged or hand-held dies under heavy daily quotas, which frequently resulted in minor off-centering, weak legend strikes, and rapid die degradation. While many sole reign Rome issues carry explicit workshop marks, such as Greek numerals or letters indicating the striking officina, RIC 252 issues are often distinguished by clean exergues or minimal field markings, reflecting specific emission phases that relied on standard centralized production protocols.

Obverse Typology and Imperial Iconography

The defining characteristic of RIC V Gallienus 252: Subtype 2 is its specific obverse portrait treatment. Roman Imperial Coinage catalogues categorize multiple distinct bust formats across the wider RIC 252 series, including draped, cuirassed, or bare variations. Subtype 2 is strictly defined by the radiate head of Gallienus facing right, presented without the drapery, paludamentum, or cuirass found on related subtypes. The emperor wears the corona radiata, the traditional solar crown that had distinguished the double-denarius denomination since its introduction by Caracalla. Stylistically, the portrait exhibits the refined yet severe features characteristic of Gallienus's mature sole reign. Die engravers depicted the emperor with a short, neatly trimmed beard, an upturned gaze, and tight curls of hair gathered beneath the spikes of the radiate crown. This minimalist, unarmored presentation aligns with a broader stylistic shift observed in mid-to-late sole reign portraiture at Rome, where artistic emphasis turned away from militaristic cuirasses toward a dignified, almost philosophical imperial countenance, evoking Hellenistic ruler ideals and solar divine sanction.

Reverse Iconography of Pax Aeterna

The reverse of the subtype depicts Pax, the Roman personification of peace, standing facing left in a graceful contrapposto stance. She is draped in a long stola that falls to her feet, emphasizing elegance and civil virtue over martial triumph. In her advanced right hand, Pax elevates an olive branch, the universal classical symbol of truce, clemency, and restored harmony. In her left hand, she holds a long sceptre, either held vertically or resting diagonally across her torso, signifying legitimate divine and imperial authority. The presence of Pax on coinage struck during a decade characterized by pervasive warfare and political disunity illustrates the ideological purpose of imperial numismatics. Rather than reflecting an established historical reality, the reverse design of Pax Aeterna operated as programmatic propaganda. It projected an image of stability, reassuring soldiers, citizens, and provincial subjects that the emperor possessed the divine favor necessary to bring an end to internal strife and repel barbarian incursions across the Rhine and Danube frontiers.

Epigraphy and Legend Significance

The epigraphic structure of RIC V Gallienus 252: Subtype 2 is concise and formulaic. The obverse carries the uninterrupted inscription IMP GALLIENVS AVG, moving clockwise from the lower left rim. This formula incorporates the three cornerstone titles of the ruler: Imperator, declaring his supreme military command; the personal imperial name Gallienus; and Augustus, denoting the supreme civic and religious rank of the princeps. By omitting elaborate iteration of consulships or tribunician powers, the inscription maintains brevity, fitting neatly within the constricted border of small, late-period flans. The reverse bears the legend PAX AETERNA, translating to 'Eternal Peace'. The lettering is executed in the standard Roman serif capital style typical of third-century Rome mint cutters, characterized by slightly compressed letterforms, broad crossbars on the letter A, and variable spacing dictated by the contour of the standing deity. The pairing of the Augustus title with Pax Aeterna established a direct theological link between the ruling monarch and the perpetual blessings of peace, framing Gallienus not merely as a commander, but as the indispensable guarantor of civil order.

Classification and Relative Chronology

Within modern numismatic frameworks, RIC V Gallienus 252 constitutes a composite type containing several distinct bust varieties, catalogued as separate subtypes within the Online Coins of the Roman Empire (OCRE) database. Subtype 2 is isolated precisely by its obverse combination: an unadorned radiate head right paired with the uninterrupted IMP GALLIENVS AVG legend and the standard Pax standing reverse. Chronologically, this emission belongs entirely to the sole reign of Gallienus, following the collapse of the joint rule with Valerian in AD 260 and concluding before Gallienus's assassination outside Milan in the late summer of AD 268. Numismatists place this specific subtype in the middle phase of the sole reign, approximately AD 262 to AD 266, before the massive production of the famous 'zoo series' of AD 267 and AD 268, which featured mythological protectors and wild beasts accompanied by officina letters. Subtype 2 is distinguished from earlier joint-reign issues by its noticeably lighter weight, diminished flan size, and depleted silver content, and from neighboring sole-reign variants by the deliberate absence of military drapery around the imperial neck.

Circulation, Hoard Evidence, and Monetary Velocity

Antoniniani of the Pax Aeterna type circulated extensively throughout the central and western territories of the Roman Empire that remained under Gallienus's direct administrative control. Massive quantities of these coins entered circulation to pay legionary salaries, administrative stipends, and imperial supply contracts. Archaeological excavations and hoard analyses provide detailed insight into the behavior of this coinage in daily commerce. Significant deposits, such as the Cunetio and Normanby hoards discovered in Britain, alongside numerous continental hoards from Italy, the Balkans, and the Gallic borders, contain substantial proportions of Gallienus's Rome-minted billon radiates. Under the pressure of Gresham's Law, Roman citizens systematically hoarded older, finer silver antoniniani struck under the Severan emperors and Gordian III, while circulating base billon issues like RIC 252 with tremendous velocity. Because the thin surface silvering wore off rapidly during commercial transactions, surviving specimens frequently show exposed copper cores, moderate to heavy wear on high relief points such as the radiate crown and Pax's drapery, and jagged flan cracks resulting from rapid striking on poorly annealed metal.

References

1. The Cunetio Hoard: Roman Coinage of the Third Century AD. pp. 24-32
2. Crise et monnaie: Le troisième siècle après J.-C.. pp. 112-118
3. Online Coins of the Roman Empire: RIC V Gallienus (2) 252: Subtype 2. ric.5.gall(2).252.2
4. The Roman Imperial Coinage, Volume V, Part I. p. 156, no. 252