Numerian Silver Antoninianus

Monetary Context and Reform Standards

The antoniniani issued under Numerian belong to the terminal phase of the radiate billon denomination established during the third-century imperial monetary crisis. Originally introduced under Caracalla in AD 215 as a double denarius containing roughly fifty percent silver, the antoninianus suffered decades of severe debasement that reduced its precious metal content to under three percent by the joint reign of Gallienus and Valerian. In AD 274, the emperor Aurelian instituted a major currency reform aimed at restoring public confidence and stabilizing the imperial fiscal machinery. Aurelian defined a reformed radiate coin, frequently termed the aurelianus by modern numismatists, pegged to a fixed weight standard of approximately 1/84 of a Roman pound (roughly 3.9 grams) with a standardized billon composition of twenty parts copper to one part silver, or approximately five percent silver by weight. This reformed standard was explicitly proclaimed on the reverse exergue by the value mark XXI in Latin-speaking western and central mints, or KA (the Greek numerical equivalent for twenty and one) in eastern and bilingual workshops. The mints maintained this exact monetary formula through the successive reigns of Tacitus, Florianus, Probus, Carus, and Carus's sons, Carinus and Numerian. Although classified systematically under silver coinages in major catalogues such as Roman Imperial Coinage and Online Coins of the Roman Empire, the antoniniani of Numerian are metallurgical billon or silvered bronze. To present the visual appearance of a high-grade silver denomination, blank planchets were subjected to an acid blanching or pickling process before striking. This depletion silvering dissolved copper from the outer surface of the flan, leaving an exterior enrichment of micro-thin pure silver. In practical circulation, this delicate layer wore away quickly, exposing the base metal core beneath.

Production Technology and Mint Organization

The production of antoniniani for Numerian was distributed across an empire-wide network of established state mints: Lugdunum (modern Lyon), Rome, Ticinum (modern Pavia), Siscia (modern Sisak), Cyzicus, Antioch, and Tripolis in Phoenicia. Each facility operated multiple workshops (officinae) to manage large-scale military and civic coin production. Mint organization during this period was characterized by strict bureaucratic accountability, recorded directly in the coin dies through complex systems of exergual marks, field letters, and workshop symbols. Different regional centres utilized distinctive marking systems. The mint of Rome employed Greek officina letters (Alpha through Zeta) alongside the value code KA, producing exergual marks such as KAΔ or KAΓ. At Ticinum, the workshop letters were integrated directly into the value mark, yielding variants such as VXXI, VIXXI, or TXXI. Siscia struck antoniniani marked with XXI or prefixes such as SMSXXI. In the East, Cyzicus and Antioch combined XXI in the exergue with workshop letters (such as A through H, or Greek combinations) placed in the left, right, or central reverse fields. Tripolis utilized marks pairing TR in the field with XXI in the exergue. In contrast, the mint of Lugdunum routinely omitted the XXI value mark entirely, identifying its officinae via simple single letters such as A, B, C, or D in the reverse fields or exergue. Metrologically, Numerian's antoniniani display considerable internal variation resulting from rapid batch production. Struck flans generally range in diameter between 20 and 24 millimetres. Individual specimen weights cluster between 3.0 and 4.5 grams, with an overall average hovering between 3.6 and 4.0 grams. Striking was executed using heavy iron dies; while die axes are often upright (12 o'clock) or inverted (6 o'clock), irregular intermediate alignments are also frequently encountered.

Obverse Iconography and Imperial Portraiture

The primary defining attribute of the obverse design is the radiate crown worn by Numerian, the traditional numismatic signifier of a double-denomination fraction since the early Principate. The emperor's portraiture directly reflects his constitutional status and the evolving political narrative of his brief life. During his first phase as Caesar (autumn AD 282 to summer AD 283), Numerian is portrayed with youthful, idealized features, typically clean-shaven or with faint, light side whiskers. The portrait bust is most commonly depicted facing right, either draped and cuirassed, draped only, or cuirassed only, frequently seen from the front or three-quarters from behind. Following his elevation to Augustus in summer AD 283, the obverse portraits assume greater gravitas and militaristic severity. The bust becomes broader, often sporting close-cropped military stubble or a short beard, dressed in ornate muscle cuirass or scale armor over paludamentum drapery. While right-facing busts remain the overwhelming standard across all mints, rare ceremonial variants exist, including left-facing radiate busts, busts viewed heroically from behind, or portraits holding imperial sceptres or consular scipiones. Following Numerian's death in late AD 284, a distinct series of posthumous consecration antoniniani was struck at Rome by his brother Carinus. On these memorial issues, the obverse bust is inscribed DIVO NVMERIANO, displaying a bare or radiate head right, stripped of military armor to symbolize his ascent to divine status among the gods.

Reverse Iconography and Thematic Program

The reverse repertoire of Numerian's antoniniani combines established dynastic motifs with acute political responses to military events, particularly the ongoing Persian expedition in the East. During his tenure as Caesar, the dominant reverse type across western and central mints was PRINCIPI IVVENTVT or PRINCIPI IVVENT (To the Prince of the Youth). This design depicted the young prince standing in military uniform, holding a military standard, baton, or globe in his right hand and a transverse or vertical sceptre in his left hand, emphasizing his fitness as heir to the throne. Upon his promotion to Augustus, the thematic scope broadened considerably. In the eastern mints of Antioch and Cyzicus, which directly supported the imperial retinue on the Persian campaign, the preeminent reverse type became VIRTVS AVGG (The Valor of the Augusti). This dramatic investiture scene portrays Numerian in full military regalia standing right, receiving a globe or a miniature Victory holding a wreath from Jupiter or his father Carus. Another prominent eastern and western type, CLEMENTIA TEMP (The Clemency of the Times), mirrored this compositional framework to celebrate dynastic order and the clemency of the ruling house. In the central and western mints, civil virtues and divine guardians predominated. Rome struck an iconic and stylistically distinctive series dedicated to PIETAS AVGG, depicting Mercury standing left holding a money bag (crumena) and a caduceus, an unusual divine patron for third-century radiate billon. Lugdunum heavily favoured PAX AVGG, depicting Pax standing left holding an olive branch and a long transverse sceptre, projecting stability and reconciliation in Gaul. At Ticinum and Siscia, the most pervasive design was PROVIDENT AVGG or PROVIDENTIA AVGG, showing Providentia standing left holding ears of grain over a modius in her right hand and a cornucopiae in her left hand, affirming the regime's foresight in securing imperial food supplies and administrative stability. Other standard types include ORIENS AVGG depicting the sun god Sol advancing with a raised right hand and whip, MARS VICTOR, FIDES MILITVM, and IOVI CONSERVAT AVGG. Posthumous consecration coins struck under Carinus feature an eagle standing front with spread wings or an altar, accompanied by the inscription CONSECRATIO.

Epigraphy and Titular Formulas

The legends on Numerian's antoniniani follow strict epigraphic formulas that allow numismatists to establish chronological sequences and differentiate mint practices. All inscriptions are in Latin characters, although Greek letters frequently occur in exergues and fields as workshop numbers or value marks. As Caesar (AD 282 to 283), obverse legends emphasize Numerian's junior dynastic position: - M AVR NVMERIANVS C (Rome, Ticinum) - M AVR NVMERIANVS NOB C (Rome, Siscia) - NVMAERIANVS NOB CAES (Cyzicus, noting the regional phonetic spelling with 'AE') - IMP C M AVR NVMERIANVS NOB C (Antioch, incorporating the imperatorial title prematurely in certain eastern emissions) As Augustus (AD 283 to 284), the legends adopt full imperial titulature, expressing supreme executive and religious authority: - IMP NVMERIANVS AVG (Rome, Lugdunum) - IMP C NVMERIANVS AVG (Lugdunum, Rome) - IMP NVMERIANVS P F AVG (Ticinum, Siscia) - IMP C M AVR NVMERIANVS P F AVG (Antioch, Cyzicus, Rome) On the reverse, grammatical constructions alternate between nominative declarations of abstract virtues (PAX AVGG, PROVIDENT AVGG, PIETAS AVGG) and dative dedications honoring the ruler or deities (PRINCIPI IVVENTVT, IOVI CONSERVAT AVGG, DIVO NVMERIANO). The recurring use of the double 'G' in AVGG (abbreviating Augustorum) directly communicates collegial rule, referencing the joint reigns of Carus and his sons, or the subsequent fraternal partnership between Carinus and Numerian.

Typology and Chronological Classification

The modern chronological framework for Numerian's antoniniani relies on the foundational classification systems established by Percy H. Webb in Roman Imperial Coinage (Volume V, Part II) and refined through Karl Pink's detailed die and emission studies in Der Aufbau der römischen Münzprägung in der Kaiserzeit. The coinage divides neatly into three major chronological phases: 1. Caesariate Emissions (autumn AD 282 to mid AD 283): Following Carus's seizure of power and the elevation of his two sons, the mints commenced production for Numerian as Caesar. In the West, Lugdunum and Rome struck modest introductory issues centered almost exclusively on the PRINCIPI IVVENTVT type. In the East, Antioch and Cyzicus produced extensive series celebrating the gathering military force for the upcoming Persian campaign, employing CLEMENTIA TEMP and early investiture types. 2. Augustan Emissions (mid AD 283 to November AD 284): Upon the sudden death of Carus near Ctesiphon in summer AD 283, Numerian was elevated to Augustus alongside Carinus. Antioch and Cyzicus expanded production enormously, striking the prolific VIRTVS AVGG radiates that circulated throughout the mobile eastern army. Simultaneously, western mints recognized Numerian's new rank by integrating his name into parallel production cycles alongside Carinus, allocating specific officinae to each brother. At Rome, workshop Delta was frequently assigned to Numerian's PIETAS AVGG series, while Ticinum produced substantial runs of PROVIDENT AVGG. 3. Posthumous Consecration Series (late AD 284 to early AD 285): Following Numerian's death in Asia Minor and the immediate proclamation of Diocletian by the eastern legions, Carinus retained control of the western mints. At Rome, Carinus struck an official emission of DIVO NVMERIANO antoniniani with CONSECRATIO reverses, officially deifying his deceased brother before Carinus himself was defeated at the Battle of the Margus in AD 285.

Circulation, Hoard Evidence, and Monetary Impact

Despite Numerian's reign lasting barely two years, his billon antoniniani were produced in massive numbers and achieved extensive circulation throughout the Roman Empire. Archaeological hoard evidence demonstrates that these coins circulated seamlessly alongside the abundant radiates of Aurelian, Tacitus, Florianus, and Probus. They are consistently present in major late third-century hoards across the western provinces (such as the Cunetio and Normanby hoards in Roman Britain and the Venèra hoard in northern Italy) as well as Near Eastern deposits (such as the Nahr Ibrahim hoard in modern Lebanon). Hoard analyses demonstrate clear regional distribution patterns. Eastern hoards from Syria, Asia Minor, and the Levant show a heavy preponderance of Antioch and Cyzicus antoniniani bearing the VIRTVS AVGG type, confirming that these coins were distributed directly to the eastern expeditionary forces as military pay. In contrast, European finds are dominated by products of Rome, Ticinum, and Lugdunum. The circulation lifespan of Numerian's antoniniani extended well beyond his death. They remained an active medium of exchange until the monetary reform of Diocletian in AD 294, which reorganized the Roman currency system around the bronze follis (nummus) and reintroduced a pure silver denomination, the argenteus. Even after the reform of AD 294, third-century billon radiates continued to circulate as heavily discounted fractional small change alongside post-reform radiate fractions during the First Tetrarchy, disappearing completely only in the currency demonetizations and recalls of the early fourth century AD. Contemporary imitations (barbarous radiates) copying Numerian's types occur occasionally in northwestern Europe, but they are significantly less common than the mass imitations inspired by the Gallic Empire and the Divus Claudius series.

References

1. Online Coins of the Roman Empire: Numerian. American Numismatic Society and Institute for the Study of the Ancient World. Online Coins of the Roman Empire (OCRE).
2. Der Aufbau der römischen Münzprägung in der Kaiserzeit, VI/2: Carus und Söhne. Pink, K. (1963). Der Aufbau der römischen Münzprägung in der Kaiserzeit, VI/2: Carus und Söhne. Numismatische Zeitschrift, 80, pp. 5-68.
3. The Roman Imperial Coinage, Volume V, Part II: Probus to Amandus. Webb, P. H. (1933). The Roman Imperial Coinage, Vol. V, Part II. London: Spink & Son, pp. 187-202.