Constantius II Silver Siliqua RIC VIII Sirmium 15

Monetary Context and the Mid-Fourth-Century Siliqua

During the mid-fourth century AD, the monetary system of the Roman Empire rested upon a tri-metallic structure dominated by the gold solidus, supplemented by silver denominations and increasingly debased billon or bronze nummi. Constantine the Great had revived regular silver striking with the introduction of the siliqua and the heavier miliarense, aligning their production to standard fractions of the Roman pound (libra). By the joint and sole reigns of Constantius II, the reduced siliqua struck at 1/144th of a pound (theoretically weighing roughly 2.27 grams) had crystallized as the workhorse silver coin of the Roman state. Unlike bronze issues, which suffered from frequent debasement and rapid tariff alterations, the siliqua maintained an exceptionally high silver fineness, typically exceeding ninety to ninety-five percent purity. This high standard made silver an indispensable tool for targeted state payments, particularly imperial donatives to the legions, civil service bonuses, and frontier fiscal balances. The issue of RIC VIII Sirmium 15 emerged amidst significant political consolidation following the civil war against the western usurper Magnentius. When Constantius II recovered the central Balkan regions and drove Magnentius westward after the catastrophic Battle of Mursa Major in AD 351, restoring monetary confidence was an urgent imperial priority. Silver issues bearing the tricennial and quadragennial vows served not merely as fiscal liquidity, but as tangible proof of legitimate, uninterrupted imperial authority and economic stability.

Production and the Operation of the Sirmium Mint

Sirmium, modern Sremska Mitrovica in Serbia, held immense strategic value in late antiquity as an imperial capital and military logistical base near the Danubian limes. The mint of Sirmium was opened or extensively reorganized by Constantius II in AD 351 precisely to support military campaigns and administrative operations during and immediately following the Magnentian rebellion. Operating as an imperial court mint (comitatensian facility) that moved with or operated in close proximity to the emperor's traveling administration, the workshops at Sirmium produced coinage in all three metals, with silver output forming a notable component of its early output. RIC VIII Sirmium 15 was struck in silver from carefully prepared blanks. Production at Sirmium achieved a refined standard of die cutting and flan preparation, characteristic of comitatensian silver workshops of the 350s. The coin dies were cut by skilled engravers capable of executing delicate lettering within the confined space of a laurel wreath. Coins belonging to this type carry the mint signature in the exergue, distinguishing Sirmium's emissions from contemporary silver issues struck at eastern facilities such as Antioch and Constantinople, or western centers such as Arles, Lyon, and Rome.

Obverse Iconography and Imperial Portraiture

The obverse of RIC VIII Sirmium 15 features the right-facing profile bust of Constantius II. The emperor is depicted wearing a pearl diadem, a drapery over a cuirass (draped and cuirassed), embodying both civil majesty and military command. The diadem, composed of two parallel strands of pearls tied at the back of the head with fluttering ribbon ends, had by the 350s fully superseded the traditional laurel wreath as the premier insignia of imperial sovereignty. The portraiture is rendered in the distinctive fourth-century court style: stylized, formal, and characterized by large, wide-set eyes gazing slightly upward or forward, an arched nose, and neatly arranged hair combed forward under the diadem band. The cuirass and paludamentum (military cloak) are pinned at the right shoulder, showing subtle variations in fold rendering depending on individual die engravers. This iconographic formula projected an image of serene, divinely sanctioned autocracy, deliberately eschewing the realistic verism of early imperial art in favor of an idealized, immutable representation of the Augustus.

Reverse Design and Votive Symbolism

The reverse of RIC VIII Sirmium 15 is entirely epigraphic and symbolic, presenting a four-line inscription enclosed within a prominent laurel wreath: VOTIS / XXX / MVLTIS / XXXX. The wreath is tied at the bottom with a ribbon forming outward loops, and at the top it is often fastened by a circular medallion or central jewel. Below the tie, in the exergue, appears the mintmark designating production at Sirmium. Votive coinage constituted one of the most prolific thematic categories in late Roman numismatics. The formula VOTIS XXX indicates the solemn discharge of vows taken for thirty years of rule, while MVLTIS XXXX expresses prayers and anticipatory vows for forty years of reign. Constantius II had been raised to the rank of Caesar on November 8, AD 324, by his father Constantine I. His tricennalia was officially celebrated between AD 353 and 354, making this reverse type an explicit celebratory monument to his long tenure and dynastic continuity. Placing the votive inscription within an enclosing wreath drew upon a centuries-old Roman tradition connecting civic victory, divine favor, and imperial longevity.

Inscriptions and Epigraphic Analysis

The obverse inscription of RIC VIII Sirmium 15 reads continuously or with slight spacing as D N CONSTAN-TIVS P F AVG, representing Dominus Noster Constantius Pius Felix Augustus. The title Dominus Noster ('Our Lord') emphasizes the autocratic framework of the Dominate, firmly entrenched since the Tetrarchy, while Pius Felix ('Pious and Blessed') asserts traditional imperial virtues and divine sanction. The legend break occurs across the top of the emperor's diademed head, typically dividing the nomen as CONSTAN-TIVS, which balances the visual composition of the coin. The reverse inscription is arranged horizontally in four distinct lines: line one reads VOTIS, line two XXX, line three MVLTIS, and line four XXXX. In the exergual area beneath the wreath, the mint signature identifies the striking mint, appearing in forms such as SIRM or with flanking puncta (such as dot-SIRM-dot), confirming production at the primary workshop of Sirmium. The lettering on these silver issues is executed with clean, slender strokes, using standard square Roman capitals that contrast with the heavier, less disciplined lettering occasionally seen on contemporary base-metal issues.

Typology and Chronological Placement

In the typological framework of Roman Imperial Coinage, Volume VIII, compiled by J. P. C. Kent, RIC VIII Sirmium 15 is assigned to the period between AD 351 and 355. This window coincides with the recovery of Illyricum by Constantius II, his prolonged stay in the Danubian and Balkan regions, and his preparations for administrative reorganizations before shifting his attention further west and subsequently back to the Persian frontier. The votive calculation confirms that the type was struck in close proximity to AD 353-354, when the emperor celebrated his tricennalia. While earlier votive silver issues under Constantius had celebrated VOTIS XXV MVLTIS XXX or VOTIS XX MVLTIS XXX, RIC VIII Sirmium 15 stands among the quintessential representations of the mature tricennial cycle. Kent organized the Sirmium silver series by minor variations in the wreath closure, exergual punctuation, and die engraving characteristics, differentiating RIC 15 from subsequent emissions such as RIC 17 and related fractional silver. The type forms an integral link in the evolutionary sequence of fourth-century siliquae, bridging the transitional issues struck during the Magnentian usurpation and the widespread VOTIS XXX MVLTIS XXXX issues produced later across Gaul, Italy, and the East.

Circulation, Hoards, and Economic Function

Siliquae of Constantius II, particularly the ubiquitous VOTIS XXX MVLTIS XXXX issues, enjoyed broad and durable circulation throughout the Roman world and along its peripheries. Because silver was primarily issued to pay soldiers and senior civil officials, large quantities were transported to frontier garrisons along the Danube and the Rhine. In these frontier zones, siliquae were often hoarded as storehouses of intrinsic value rather than used for daily market retail transactions. Well-known hoards from Roman Britain, the Rhineland, the middle Danube basin, and the northern provinces contain substantial proportions of Constantinian siliquae. In Britain, where silver circulated intensely into the late fourth and early fifth centuries, earlier siliquae of Constantius II were frequently retained, clipped during the currency crises of the early 400s, or buried in massive monetary deposits. Although struck in the Balkans, RIC VIII Sirmium 15 moved through inter-provincial military transfers and trade, illustrating the high mobility of late Roman precious-metal coinage across broad geographic horizons.

References

1. The Late Roman Silver Coinage: Problems and Solutions. pp. 12-28
2. Roman Coins from the Earliest Times to the Fall of the Western Empire. pp. 210-224
3. Online Coins of the Roman Empire: RIC VIII Sirmium 15. ric.8.sir.15
4. The Roman Imperial Coinage, Volume VIII: The Family of Constantine I, A.D. 337-364. pp. 385-387