Gratian Bronze AE4, RIC IX Siscia 31A

Monetary Context and Votive Ideology

The issue catalogued as RIC IX Siscia 31A emerged during the precarious years following the catastrophic Roman defeat at Adrianople in August AD 378. Following the death of Emperor Valens in Thrace, Gratian stood as the senior Augustus alongside his younger half-brother Valentinian II, subsequently elevating Theodosius I to govern the East in January AD 379. Within the Roman imperial collegium, mints routinely struck coin types across multiple denominations for all recognized Augusti. Siscia, situated in modern-day Sisak, Croatia, operated as a critical administrative and logistical mint supporting the Danubian military infrastructure. The denomination represented by RIC IX Siscia 31A is categorized by modern numismatists as an AE4, the smallest bronze fraction of the late imperial monetary system, measuring generally around 13 to 14 millimeters in diameter with a target weight hovering near 1.1 to 1.3 grams. Base-metal coinage in this era served the functional necessities of local markets, petty trade, and subsidiary military payments. The reverse inscription of this type celebrates Gratian's quindecennalia (fifteen years of rule) combined with the prayer for his vicennalia (twenty years of rule). While the vows commemorated ancient Republican religious contracts renewed by Augustus, by the late fourth century they functioned primarily as standardized propaganda markers of imperial legitimacy, longevity, and stability amid profound geopolitical disruptions.

Mint Organization and Production at Siscia

During the joint reigns of Gratian, Valentinian II, and Theodosius I, the mint of Siscia maintained multiple active workshops, or officinae, to supply coin to the province of Pannonia and neighboring regions. The production of RIC IX Siscia 31A took place across these numbered workshops, typically indicated by Greek numeral prefixes or Latin letters integrated into the mint signature located in the reverse exergue. Known exergual markings for Siscia's votive AE4 series include combinations such as ASISC, BSISC, and GSISC, signifying the primary, secondary, and tertiary officinae. Engravers at Siscia worked from standardized imperial guidelines, yet local stylistic handiwork is visible in the rendering of portraits and wreath details. Dies were sink-cut in bronze or iron, producing compact flans by casting strips or flattening cast pellets prior to striking. The mechanical execution reflects the rapid, high-capacity manufacture characteristic of the late fourth-century Pannonian mints, where die alignment and flan centering often varied widely. Siscia closed its mint operations not long after this period, making this votive series among the later systematic base-metal outputs produced by this long-standing Danubian mint before its eventual decommissioning.

Obverse Typology and Imperial Iconography

The obverse of RIC IX Siscia 31A features the right-facing bust of Emperor Gratian. His portrait is depicted with a pearl diadem, draped with imperial robes, and armored with a military cuirass (pearl-diademed, draped, and cuirassed, right). In late fourth-century Roman portraiture, naturalistic individual likeness gave way to formalized, stylized representations of majesty and divine sanction. Gratian is shown clean-shaven with large, upward-tilted eyes and neat, cap-like hair crowned by the diadem, which served as the quintessential emblem of Roman imperial authority established by Constantine I. The combination of paludamentum (drapery) and cuirass signified the dual role of the Augustus as supreme civil magistrate and commander-in-chief of the Roman armies. Die cutting across different obverse dies at Siscia demonstrates noticeable variation in the delicacy of the diadem pearls and the proportion of the head relative to the legend field, reflecting the activity of multiple die sinkers working simultaneously.

Reverse Iconography and Design Composition

The reverse design consists of a four-line inscription enclosed within an intact laurel wreath: VOT / XV / MVLT / XX. The wreath serves as an ancient triumphal symbol, framing the sacred vow and evoking uninterrupted victory and divine favor. The leaves are rendered as repeating chevron or ovate clusters tied at the bottom with a decorative knot or bow, occasionally displaying dangling ribbons or a jewel at the summit. Inside the wreath, the votive lettering is neatly organized in a balanced, central block. Below the wreath, set off by a horizontal exergual baseline, stands the mint mark confirming production at Siscia. Unlike earlier periods where reverse types depicted complex allegorical scenes, personifications, or deities, late fourth-century small bronzes increasingly favored straightforward epigraphed designs such as wreaths and short Christian or civic mottoes, facilitating rapid die production and immediate textual comprehension.

Epigraphy and Legend Structure

The obverse inscription of RIC IX Siscia 31A reads D N GRATIA-NVS P F AVG, broken around the crown of the head between the letters A and N. This text abbreviates Dominus Noster Gratianus Pius Felix Augustus, translating to 'Our Lord Gratian, Pious and Fortunate Augustus'. The prefix Dominus Noster represented the standard late imperial form of address, emphasizing autocratic lordship over the Roman populace. The epithets Pius Felix underscored devotion to duty, divine blessing, and sustained good fortune. On the reverse, the four-line votive text VOT / XV / MVLT / XX expands in Latin to Votis Quindecennalibus Multis Vicennalibus ('vows for fifteen years [of rule], with prayers for twenty more'). The epigraphy on these small flans is executed in condensed late Roman capitals, which frequently exhibit minor ligature, variation in letter spacing, or truncation due to the limited surface area of the AE4 planchets.

Chronology, Classification, and Collegial Context

RIC IX Siscia 31A belongs to a coordinated votive emission struck between August AD 378 and August AD 383, coinciding with the window between the death of Valens and the assassination of Gratian. In the catalogue arrangement of Roman Imperial Coinage Volume IX, series 31 is subdivided among the co-rulers: type 31A features Gratian, whereas parallel entries accommodate the junior emperor Valentinian II and later Theodosius I with adjusted votive numbers suited to their respective regnal counts, such as VOT V MVLT X for the newer Augusti. Gratian had been elevated to Augustus by his father Valentinian I in August AD 367, thereby completing his quindecennial milestone (fifteen years) in August AD 382. Consequently, numismatists date the inception of this specific legend formula to approximately AD 378 or 379 in anticipation of the anniversary, continuing until Gratian's overthrow by Magnus Maximus in AD 383. The classification 31A definitively identifies Gratian's fifteen-year vota issue from Siscia, isolating it from subsequent votive series struck under Theodosius I and Arcadius.

Circulation, Hoard Evidence, and Site Finds

Bronze AE4 coins of the VOT XV MVLT XX type circulated heavily throughout Illyricum, the Balkans, and adjacent provinces of the Western Empire. Because base-metal coins carried an intrinsic metal value considerably lower than their nominal purchasing power, they rarely traveled long distances in international commerce but moved extensively via local retail transactions, troop movements, and regional administrative payments. Archaeological excavations and hoard deposits across modern Austria, Hungary, Slovenia, Serbia, and northern Italy routinely yield Siscia-minted AE4s of this period. Due to their small size, high velocity of circulation, and prolonged use alongside subsequent bronze issues of the House of Theodosius, surviving specimens often exhibit significant mechanical wear, corrosion, and off-center strikes. Hoard evidence demonstrates that these small votive bronzes continued to circulate well into the fifth century AD, remaining in commercial use long after the collapse of the mint of Siscia itself.

References

1. Late Roman Bronze Coinage, A.D. 324-498. Part II, pp. 74-78
2. Online Coins of the Roman Empire: RIC IX Siscia 31A. ric.9.sis.31A
3. The Roman Imperial Coinage, Volume IX: Valentinian I to Theodosius I. pp. 150-151, no. 31a