Otacilia Severa Sestertius, RIC IV Philip I 200A

Monetary Context and the Saecular Games

The reign of Philip I, known historically as Philip the Arab (AD 244 to 249), coincided with a defining epochal milestone: the completion of Rome's first millennium since its traditional founding by Romulus in 753 BC. To honor the year 1000 Ab Urbe Condita in AD 248, the imperial administration organized the Ludi Saeculares, or Saecular Games, on an unprecedented scale. These celebrations served not only as religious purifications and public entertainments, but also as vital political mechanisms designed to legitimize Philip's regime, solidify dynastic security, and project an image of renewed prosperity across an empire increasingly beset by internal rebellions and frontier pressures. Within the Roman monetary hierarchy, the sestertius retained a prestigious position. Although the double denarius or antoninianus had emerged as the predominant silver coin driving military expenditures and state finance, the sestertius, typically minted from orichalcum or bronze, functioned as the premier large token denomination for civilian commerce and everyday market exchanges in Rome and the Western provinces. Base-metal coinage struck at Rome still bore the senatorial formula Senatus Consulto (S C), preserving the long-standing constitutional fiction of shared administration between the emperor and the Roman Senate. Issuing commemorative bronze types under Otacilia Severa's name underscored her exalted status as Augusta and mother of the young co-emperor Philip II, weaving her dynastic identity into the sacred continuity of the state.

Production and Mint Organization

All attested specimens of RIC IV Philip I 200A were produced exclusively at the primary imperial mint in Rome. During the Saecular festivities of AD 248, the Rome mint was mobilized to strike an extraordinary volume of commemorative coinage across gold, silver, and copper alloys. Numismatic scholarship, beginning with the foundational analyses of Karl Pink and expanded by Harold Mattingly, has demonstrated that the Rome mint operated through an organized system of officinae or workshops. The commemorative Saeculares coinage was distributed systematically among these workshops, with specific reverse typologies, frequently featuring sacrificial altars or wild beasts associated with the amphitheater, allocated across different members of the imperial family. While the silver antoniniani of this issue frequently carried workshop marks in their reverse fields or exergues (such as Roman numerals or Greek letters), the large bronze sestertii typically omitted explicit officina letters, relying instead on standard iconographic conventions and the prominent S C mark. Production of these heavy bronze planchets required considerable physical force, employing heated copper-alloy blanks struck between engraved iron dies. Die alignment for the issue typically adheres to the standard Roman medallic or inverted axis (approximately 12 o'clock or 6 o'clock), though minor variations in alignment are common in mid-third-century bronze manufacture.

Obverse Iconography and Imperial Portraiture

The obverse of RIC IV Philip I 200A features a right-facing bust of Empress Marcia Otacilia Severa, diademed and draped in traditional imperial attire. Her hair is rendered in the distinctive coiffure fashionable among noble women of the late Severan and mid-third-century periods: drawn back from the face in gentle waves, braided or plaited horizontally, and secured up the back of the head into a broad, flat woven braid that fastens near the crown beneath a stephane or diadem. This style deliberately echoed the dignified, conservative matronly iconography popularized by earlier Severan empresses such as Julia Domna and Julia Mamaea. Otacilia's features are delineated with restrained naturalism, portraying a composed and mature demeanor appropriate for the empress consort and mother of the heir. Unlike the radiate crown reserved for the emperor on double denominations or the crescent moon frequently placed beneath an empress's bust on double-value antoniniani and double sestertii, the portrait on this standard sestertius terminates cleanly on draped shoulders with a diadem, signaling the singular unit value of the denomination.

Reverse Iconography: The Hippopotamus

The reverse design of this type features a hippopotamus standing to the right, a creature rarely depicted in the Roman imperial numismatic corpus. The beast is depicted with a heavy, barrel-shaped torso, thick columnar legs, small ears, and an open or squared snout, capturing the recognizable anatomy of the Nilotic mammal. In the Roman arena, exotic animals from Africa and the eastern provinces were collected at enormous expense for public venationes (beast hunts) and displays of imperial dominion over the known natural world. The Historia Augusta and contemporary accounts note that the menageries displayed during Philip's millennial games included animals previously assembled by Gordian III for his planned Persian triumph, among them lions, leopards, giraffes, rhinoceroses, and hippopotami. In the context of the Saecular celebration, the presence of the hippopotamus on Otacilia Severa's coinage symbolized both the vast geographic extent of imperial reach and the lavish generosity of the imperial house in providing magnificent public spectacles. In the lower field or exergue, the large letters S C denote the formal sanction of the Senate for the striking of aes coinage.

Inscriptions and Epigraphy

The legends of RIC IV Philip I 200A are concise and politically purposeful. The obverse inscription reads MARCIA OTACIL SEVERA AVG, an abbreviated form of 'Marcia Otacilia Severa Augusta'. This epigraphic formulation directly identifies the empress by her full maternal and family gentilicium alongside her supreme title of Augusta, which she received upon Philip's accession in AD 244. The reverse legend carries the celebratory slogan SAECVLARES AVGG, which translates as 'Of the Saecular Games of the Emperors'. The use of the geminated 'GG' in 'AVGG' signifies the joint rule of the two Augusti, Philip I and his young son Philip II, who had been elevated from Caesar to co-Augustus in AD 247. This plural genitive inscription firmly attributes the celebration and its benefactions to the collective imperial collegium, even while appearing on the coinage of the Augusta. In the field or lower exergue, the abbreviation S C stands for 'Senatus Consulto' ('By decree of the Senate'), affirming the constitutional validity of the token bronze denomination in the traditional Roman capital.

Typology and Chronological Classification

RIC IV Philip I 200A is classified within the monumental Saecular series of AD 248. In the cataloging system established by Harold Mattingly and Edward A. Sydenham in Roman Imperial Coinage, the type is cataloged under Otacilia Severa's bronze issues during Philip I's reign as RIC IV Part III, page 94, number 200A. The type corresponds closely to neighboring silver antoniniani bearing the identical reverse motif of the hippopotamus (such as RIC IV Philip I 116), which served as Otacilia's designated animal type within the Saecular bestiary. While Philip I was associated with the lion, stag, and she-wolf with twins, and Philip II with the elk and goat, Otacilia was consistently paired with the hippopotamus. Minor stylistic variants exist in the die cutting of 200A, such as the exact posture of the hippopotamus, the presence of skin folds, or the positioning of the letters S C either in the exergue beneath a ground line or divided across the left and right fields. However, all these minor die-level variations represent a single conceptual emission struck strictly within the commemorative window of AD 248.

Circulation Patterns and Archaeological Evidence

As a sestertius struck in Rome, RIC IV Philip I 200A circulated primarily in Italy and the western provinces of the Roman Empire, such as Gaul, Britain, and the Danube frontier, where base-metal civic transactions remained prevalent during the mid-third century. In the eastern provinces, local civic bronzes and provincial tetradrachms largely met currency demands, making western hoards and urban excavations the primary recovery environments for this type. Mid-third-century sestertii often circulated for several decades following their release, frequently showing substantial wear and gradual loss of mass before being buried or withdrawn during the economic reorganizations under Aurelian and Diocletian. Weight standards for sestertii under Philip I typically center between 16 and 22 grams, with flan diameters ranging approximately from 27 to 31 millimeters. Surviving specimens recovered from stratified deposits reflect both the intense monetary velocity of the period and the widespread geographical dissemination of Rome's millennial propaganda to civilian populations across the western empire.

References

1. The Roman Empire and Its Coinage: The Third Century. The Millennial Issues of AD 248
2. I Medaglioni Romani, Vol. II: Bronzo. Monete e medaglioni di Otacilia Severa
3. The Roman Imperial Coinage, Vol. IV, Part III: Gordian III - Uranius Antoninus. pp. 68-96
4. Online Coins of the Roman Empire: RIC IV Philip I 200A. RIC IV Philip I 200A
5. Der Aufbau der römischen Münzprägung in der Kaiserzeit: VI/1. Probus. Saeculares Series of AD 248
6. Roman Silver Coins and Their Bronze Counterparts, Vol. IV. Philip I to Otacilia Severa