Philip I Antoninianus RIC IV Philip I 106A

Monetary and Economic Context

By the accession of Philip the Arab in AD 244, the double denarius or radiate antoninianus had effectively eclipsed the traditional silver denarius as the primary silver denomination of Roman state finance. Introduced in AD 215 under Caracalla, the antoninianus had initially represented a formal tariff of two denarii while containing silver content roughly equivalent to only 1.5 denarii, creating a built-in overvaluation that provided substantial seigniorage profits for the imperial fiscus. Following a brief suspension of its emission under Severus Alexander, the denomination was reintroduced in massive quantities by Balbinus, Pupienus, and Gordian III, becoming the workhorse coin of legionary stipends and civil administration. During Philip's reign, the Roman monetary system faced persistent fiscal demands, including heavy payments associated with concluding peace on the eastern front with Shapur I, defending the Danubian frontier against Germanic and Sarmatian incursions, and funding elaborate public celebrations in the capital. The antoninianus served as the principal vehicle for meeting these liabilities. Although nominally silver, the alloy used for issues such as RIC IV Philip I 106A had declined into a debased billon containing roughly 40 to 45 percent silver, with the remainder composed primarily of copper and small trace impurities. Contemporary financial administrators utilized surface enrichment techniques, such as blanching the flans in an acid bath prior to striking, to dissolve surface copper and impart an attractive silvery sheen upon newly minted coins. This surface sheen wore away rapidly in circulation, leaving the underlying base metal exposed as a visible symptom of mid-third-century monetary debasement.

Mint Production and Workshop Organization

The production of RIC IV Philip I 106A is securely attributed to the imperial mint situated in Rome. During the middle of the third century AD, the Rome mint operated under a highly organized system of administrative subdivisions, typically referred to as officinae or workshops. Under Philip, the mint operated at least six distinct officinae dedicated to striking base silver antoniniani for the imperial family, consisting of Philip I, his wife Otacilia Severa, and his young son and co-ruler Philip II. Unlike later issues from Philip's millennium celebration in AD 248, which frequently bore explicit officina marks in the reverse field or exergue such as Roman numerals I through VI or Greek letters, type 106A lacks an exergual workshop mark. The assignment to individual workshops during this substantive phase must instead be reconstructed through die linkages, stylistic groupings, and portrait conventions. The manufacturing process was executed under high-pressure manual conditions. Blanks were cast in multiple mold arrangements or cut from cast strips, heated to increase malleability, and positioned between an engraved lower die embedded in an anvil and an engraved upper die held by a hammer-wielding mint worker. The massive scale of Philip's Rome output required dozens of concurrently operating obverse and reverse dies, resulting in noticeable variations in flan thickness, centering, die axis alignment, and peripheral striking quality across surviving specimens of the issue.

Obverse Iconography and Portraiture

The obverse of RIC IV Philip I 106A features an official imperial portrait of Philip the Arab facing right. The emperor is depicted with mature, distinctive facial features characteristic of Rome's realistic mid-third-century portrait tradition, including a short military beard, cropped hair, a strong jawline, and prominent brow. He wears the radiate solar crown, a crown of sun rays derived from the Hellenistic depiction of Helios or Sol, which since the reform of Caracalla had functioned as the diagnostic denomination mark distinguishing the radiate double piece from the laureate single denarius. Philip is portrayed in military dress, shown as both draped and cuirassed. The drapery of the paludamentum (military cloak) is fastened over the armor at the shoulder, revealing portions of the metal breastplate beneath. This martial iconography directly reinforced the emperor's identity as supreme commander of the Roman legions, an essential attribute for an emperor who ascended the throne on campaign in the East and had to maintain the loyalty of competitive provincial armies. While the general composition remains consistent, die engravers produced minor stylistic nuances in the rendering of the radiate spikes, the angle of the bust, and the decorative details of the shoulder brooch, reflecting the collaborative output of multiple skilled engravers at the capital mint.

Reverse Iconography: Roma Aeterna

The reverse of the coin presents a full-length personification of Roma, the divine embodiment of the Roman state and imperial majesty. Roma is shown seated toward the left upon a curule seat or low-backed throne. She is attired in traditional classical military dress, wearing a crested helmet and draped in a long stola or chiton. In her outstretched right hand, she supports a small winged figure of Victory, who holds a wreath or palm branch directed toward the goddess. In her left hand, Roma holds a vertical or slightly inclined spear, grounding her martial sovereignty. Resting at her side on the ground plane is a large oval or round defensive shield. The combination of seated Roma, holding Victory and spear with her shield at hand, descends from a revered classical sculptural archetype established in the late Republic and early Empire, closely connected to the iconic cult statue housed in the Temple of Venus and Roma built by Hadrian. On RIC IV Philip I 106A, this imagery was intended to project stability, ancient majesty, and divinely sanctioned triumph during a period when the empire faced grave territorial uncertainty. The personification reassured citizens and soldiers alike that the core institutions and military might of Rome remained unyielding.

Epigraphy and Legends

The inscriptions on RIC IV Philip I 106A are executed in clear, serifed Roman capitals, designed to convey imperial legitimacy and theological continuity. The obverse legend reads IMP M IVL PHILIPPVS AVG, expanding to Imperator Marcus Iulius Philippus Augustus. This standardized titulature claims supreme military command through the title Imperator, lists the emperor's adopted Roman tria nomina demonstrating his citizen lineage from the province of Arabia, and concludes with Augustus, the ultimate signifier of supreme imperial sovereignty. This formulation belongs to the core period of Philip's reign, prior to the adoption of victorious cognomina in official coin legends. The reverse legend is inscribed as ROMAE AETERNAE, employing the dative case. This grammatical construction serves as a formal dedication: 'To Eternal Rome.' The concept of Roma Aeterna represented an essential ideological slogan in Roman public discourse, expressing the conviction that the Roman state and civilization were immortal, protected by the gods against foreign invaders and internal fracture. The epigraphic engraving demonstrates high technical competence, with letters neatly curved to follow the perimeter of the die, although mint wear, off-center striking, and die exhaustion on individual specimens often cause portions of the legend to be weakly struck or partially truncated at the flan edges.

Typology and Chronological Sequence

Within the typology of Philip the Arab's coinage formulated by Harold Mattingly and Edward A. Sydenham in Roman Imperial Coinage Volume IV Part 3, RIC IV Philip I 106A occupies a prominent place among the emperor's central Rome issues. The broad issue date provided by standard references spans from the beginning of Philip's reign in AD 244 through his death in AD 249, though internal chronological evidence and hoard analyses indicate that the bulk of the ROMAE AETERNAE issues were struck between AD 244 and 247, serving as an ideological precursor to the famous saecular celebration series of AD 248. RIC IV Philip I 106A is specifically differentiated from other Roma seated reverses by the precise combination of obverse bust style and reverse accoutrements. While closely related entries in the catalogue record variants with bust draped only, cuirassed only, or variations in the position of Roma's spear and shield, type 106A denotes the standard radiate, draped, and cuirassed bust paired with the seated Roma holding Victory and spear with adjacent shield. Neighboring types also include Philip's AD 248 millennial issues, where seated Roma reverses appear with officina numerals (such as RIC IV Philip I 44b) or different legend arrangements. Recognizing these distinctions is vital for accurate numismatic classification, as type 106A represents the unnumbered capital series struck prior to or alongside the specialized commemorative emissions.

Circulation, Hoard Evidence, and Survival

Antoninianii of RIC IV Philip I 106A saw wide circulation across the expanse of the Roman Empire, from the northwestern frontier garrisons of Britannia and the Rhine to the eastern marches of Syria and Mesopotamia. Hoard evidence demonstrates that coins of Philip I were integrated rapidly into the empire-wide monetary stream. Major third-century hoards, including the Dorchester Hoard in Britain and the Gibraltar Hoard, along with numerous continental European deposits from Gaul, the Balkans, and Italy, feature significant representations of this type. Because the antoninianus underwent accelerated debasement during the subsequent reigns of Trebonianus Gallus, Valerian, and Gallienus, coins struck under Philip retained a noticeably higher silver content (around 40 to 45 percent) than the nearly pure bronze radiates struck by AD 260. Consequently, Philip's radiates were subject to Gresham's Law: older, relatively fine antoniniani were selectively removed from daily trade, hoarded, or melted down by individuals seeking to preserve intrinsic metal value. Many preserved specimens of RIC IV Philip I 106A display moderate to heavy wear consistent with one to two decades of vigorous commercial exchange prior to their deposition during the crisis period of the AD 250s and 260s.

References

1. Coin Hoards and Hoarding in the Roman Empire. pp. 142-168
2. Coining Images of Power: Patterns in the Representation of Roman Emperors on Coinage, A.D. 193-284. pp. 180-215
3. The Great Dorchester Hoard of 1936. Numismatic Chronicle, Ser. 5, Vol. 19, pp. 21-61
4. Online Coins of the Roman Empire: RIC IV Philip I 106A. Type record ric.4.ph_i.106A
5. The Roman Imperial Coinage, Vol. IV, Part III: Gordian III - Uranius Antoninus. pp. 68-73, no. 106