Philip I Silver Antoninianus, RIC IV Philip I 72

Monetary Context and Historical Setting

The antoninianus, or radiate double denarius, formed the core of the Roman imperial silver currency during the reign of Philip I (AD 244 to 249). Introduced decades earlier under Caracalla, the denomination had steadily displaced the traditional denarius as the primary silver medium for state disbursements, particularly military pay. By the mid-240s AD, economic strain and prolonged military commitments had driven the precious metal content of the antoninianus downward to approximately 40 to 45 percent silver, with the balance composed of copper and trace alloy elements. RIC IV Philip I 72 was produced under direct geopolitical exigency. Following the death of Emperor Gordian III during his Persian expedition in early AD 244, Philip concluded a negotiated settlement with the Sasanian King of Kings, Shapur I. Under the terms of the accord, Rome agreed to substantial financial payments and territorial concessions in exchange for the safe withdrawal of Roman forces. This coin type materialized the official imperial representation of that controversial treaty, framing the settlement not as a humiliating retreat, but as an enduring, foundational peace won on Roman terms.

Mint Organization and Production at Antioch

Numismatic scholarship securely attributes RIC IV Philip I 72 to the mint of Antioch on the Orontes, the administrative and military hub of the Roman Near East. Antioch had periodically served as a supplemental or emergency imperial mint for expeditionary emperors campaigning against Parthia and the Sasanian state. Upon Philip's accession, the facility was mobilized to produce massive quantities of radiate silver to fulfill campaign disbursements, pay the withdrawing legions, and provide regional economic stability. The coins struck at Antioch during this transitional phase display marked stylistic divergence from contemporary issues produced at Rome. The Antioch engraving style is characterized by broader portrait flans, distinctively rendered eye contours, and sharper, slightly elongated lettering. Unlike later third-century Roman coinages, this issue does not carry officina or workshop marks in the reverse field or exergue, reflecting an earlier organizational phase at the Antioch mint before systematic workshop numbering was regularized across eastern production facilities.

Obverse Iconography and Imperial Presentation

The obverse design presents the bust of Philip the Arab facing right. The emperor is depicted wearing the radiate crown, the definitive numismatic attribute signifying the double denarius denomination. His portrait integrates both military and civic attributes, combining heavy drapery with visible elements of a cuirass. Iconographically, the portrait conforms to the soldier-emperor model prevalent during the third century: Philip is rendered with a squared jaw, cropped hair, and closely clipped facial stubble, reflecting military austerity and discipline. The eastern die engravers captured these features with high-relief modeling, giving the Antioch portraits a distinctively resolute expression compared to the more idealized portraiture seen on coins from the capital. The combination of radiate crown, mantle, and armor visually affirmed Philip's dual identity as supreme military commander and lawful magistrate of the Roman state.

Reverse Iconography of Pax

The reverse iconography centers on the personification of Pax, the Roman goddess of peace. She stands draped, turned toward the left, holding an olive branch upright in her extended right hand and grasping a transverse spear in her left. The olive branch was the universal Mediterranean symbol of conciliation, agricultural prosperity, and the cessation of conflict. The transverse spear, held diagonally across her body rather than held vertically in an aggressive stance, emphasized that peace had been achieved through Roman military might and remained protected by Roman arms. By adopting traditional imagery of Pax to announce the conclusion of hostilities with the Sasanians, imperial authorities utilized a visual idiom deeply familiar to legionary soldiers and provincial subjects alike, reassuring the empire of stability on its vulnerable eastern frontier.

Inscriptions and Epigraphic Analysis

The obverse legend reads IMP IVL PHILIPPVS PIVS FEL AVG P M, with occasional die variants abbreviating FELIX in place of FEL. This inscription expands to Imperator Iulius Philippus Pius Felix Augustus Pontifex Maximus. The explicit inclusion of Pontifex Maximus on the initial Antioch coinage served to advertise Philip's assumption of the chief priesthood early in his reign, legitimizing his imperial authority while still in the East. The reverse legend, PAX FVNDATA CVM PERSIS, is of extraordinary historical and epigraphic importance. Roman coinage almost universally avoided naming foreign adversaries on reverse inscriptions, preferring generic formulas like VICTORIA AVGVSTI or PAX AETERNA. The specific phrasing 'Pax Fundata cum Persis' (Peace Established with the Persians) stands out as an unprecedented official declaration. The verb 'fundata' implies a deep, grounded, and lasting foundation, a deliberate ideological effort by the new administration to portray the treaty of AD 244 as a durable political achievement rather than a costly compromise.

Typology and Chronological Placement

Catalogued under Roman Imperial Coinage as RIC IV Part III, page 79, number 72, this type belongs to the opening phase of Philip's reign, dating between AD 244 and 246. Production commenced almost immediately after the death of Gordian III and Philip's elevation in the spring of AD 244, while the emperor was still stationed in the Syrian capital preparing his march to Rome. Modern hoard studies and stylistic analyses by Roger Bland demonstrate that this eastern emission formed an inaugural series produced before the establishment of more routine reverse types at Antioch. A scarce laureate silver denarius counterpart was also struck, but the radiate antoninianus comprised the overwhelming bulk of the output. While Philip departed for Rome later in AD 244, numismatists recognize that the Antioch mint continued to strike regional issues through AD 246 to sustain the eastern military apparatus.

Circulation, Hoard Evidence, and Distribution

The circulation pattern of RIC IV Philip I 72 reflects its primary function as an eastern military issue. Significant quantities have been recorded in coin hoards and site finds across the Syrian steppe, northern Mesopotamia, and along the Levantine limes, including assemblages from Dura-Europos and regional military encampments. Because Antioch antoniniani were struck to imperial weight standards, specimens circulated alongside western issues throughout the wider Mediterranean basin, occasionally appearing in hoards discovered in the Danubian provinces and Italy. However, the concentration of finds in Syria and the eastern Mediterranean confirms that the type predominantly serviced the eastern frontier garrison and local markets before gradual integration into general third-century currency circulation.

References

1. The Coinage of Vabalathus and Zenobia from Antioch and Alexandria. pp. 11-28 (Antioch mint survey and third-century emissions)
2. Online Coins of the Roman Empire: RIC IV Philip I 72. Type ric.4.ph_i.72
3. Roman Imperial Titulature and Chronology, A.D. 235-284. pp. 30-34
4. The Roman Imperial Coinage, Volume IV, Part III: Gordian III to Uranius Antoninus. p. 79, no. 72