Constantius II Silver Reduced Siliqua

Monetary Context and Reform

The emergence of the reduced siliqua under Constantius II represents a decisive stage in the evolution of Late Roman silver currency. Following the monetary reforms of Diocletian and Constantine I, fourth-century silver production had experienced erratic intervals of issue, alternating between heavier denominations such as the miliarense and earlier siliquae struck at 1/96 of a Roman pound (roughly 3.4 grams). In the aftermath of civil war with the Western usurper Magnentius and amidst escalating financial pressures across the Danubian and eastern frontiers, the imperial administration needed an abundant, standardized silver medium to distribute regular donatives and pay civil and military officers. Between approximately 353 and 358 AD, Constantius II lowered the standard weight of the siliqua to 1/144 of a Roman pound, yielding a theoretical weight of circa 2.27 grams. This downward adjustment aligned silver supply with imperial gold solidus reserves, establishing a practical ratio between gold and silver coinage while dramatically increasing the nominal output of coin flans from available bullion supplies. The resulting reduced siliqua served as the foundational silver unit for subsequent Roman and early Byzantine monetary systems for more than a century.

Production Technology and Mint Organization

The production of Constantius II reduced siliquae was coordinated across both eastern and western imperial mints, demonstrating centralized fiscal planning. Major mint facilities participating in this output included Constantina (Arles), Lugdunum (Lyon), Rome, Aquileia, Siscia, Sirmium, Thessalonica, Constantinople, Nicomedia, Cyzicus, and Antioch. Flans were produced by casting silver droplets or cutting blanks from cast rods, which were then hammered between engraved iron or bronze dies. The metallic composition maintained a consistently high purity, frequently assayed between 92 and 98 percent fine silver, reflecting strict state control over the imperial refining and treasury departments. Production intensities varied regionally according to imperial movements and military theaters: the Balkan mint of Sirmium and the eastern metropolis of Antioch operated extensively during Constantius II's active residencies and military mobilizations, while western mints supplied silver necessary for the Caesar Julian's campaigns in Gaul. Mintmarks located in the reverse exergue rigorously identified the city of origin and workshop officina, often accompanied by control letters, palm branches, or stars to monitor quality control and bullion accounting.

Obverse Iconography and Imperial Regalia

The obverse of the reduced siliqua carries an idealized right-facing portrait of Constantius II, executed in the formal, hieratic style characteristic of mid-fourth-century Roman numismatic art. The emperor is presented clean-shaven, with neatly combed hair and stylized facial features emphasizing imperial majesty rather than individual naturalism. He wears the royal diadem, the premier symbol of autocratic authority adopted during the Constantinian era. On reduced siliquae, this headgear appears in two primary variants: the pearl diadem, composed of simple continuous rows of pearls, and the more ornate rosette or gemmed diadem, which alternates pearls with square or oval precious stones set into decorative metal frames. Constantius is consistently draped in the imperial paludamentum, a military cloak secured at the right shoulder by an ornate circular or oval jewel-encrusted brooch (fibula), worn over a cuirass. This combination of civic diadem and military garb communicated both supreme sovereign dignity and active command over the imperial armies.

Reverse Types and Votive Symbolism

Unlike contemporary bronze and gold issues that frequently featured elaborate allegorical compositions such as soldiers, captives, or fallen horsemen, the reduced siliqua was dominated by austere votive imagery. The most pervasive reverse type displays an epigraphic vow formula inscribed in three or four lines within an open or closed laurel wreath tied at the base with a bow, frequently surmounted by an eagle, cross, or central jewel. Inscriptions such as VOTIS XXV MULTIS XXX and, preeminently, VOTIS XXX MULTIS XXXX form the overwhelming majority of reduced siliqua issues. In addition to the dominant wreath types, select mints produced occasional pictorial motifs, such as Victoria Augusti advancing or seated, holding a wreath and palm branch, or Virtus Exercitus depicting the emperor or a martial figure holding a spear and trophy. Nevertheless, the wreathed vota remained the standard iconography, providing an unmistakable visual identifier for the reformed silver denomination across all imperial provinces.

Legends, Epigraphy, and Mintmarks

The obverse legends on Constantius II's reduced siliquae are uniformly Latin, proclaiming the emperor's rank and divine protection. The standard titular formula reads D N CONSTANTIVS P F AVG, abbreviating Dominus Noster Constantius Pius Felix Augustus ('Our Lord Constantius, Pious and Fortunate Augustus'). Variations exist in line breaks around the portrait bust, occasionally with unbroken inscriptions or divided arrangements such as CONSTAN-TIVS. The reverse votive texts record fulfilled vows (vota soluta) alongside anticipated future vows (vota suscepta) for the continued health and preservation of the emperor and the state: VOTIS XXV MULTIS XXX ('Vows for 25 years, and more for 30') and VOTIS XXX MULTIS XXXX ('Vows for 30 years, and more for 40'). In the exergue, complex mint signatures identify the producing establishment. Western mintmarks include PCON or SCON for Constantina (Arles), LVG for Lugdunum, R or RM for Rome, and AQ for Aquileia. Central and eastern mints employed marks such as SIRM for Sirmium, SIS for Siscia, TES for Thessalonica, C followed by an officina letter for Constantinople, SMN for Nicomedia, SMK for Cyzicus, and SMAN followed by Greek workshop numerals (alpha through delta or iota) for Antioch.

Typology, Chronological Development, and Weight Reduction

The chronological sequence of the reduced siliqua can be divided into two main phases during the sole reign of Constantius II following the demise of Magnentius in 353 AD. The initial phase, spanning roughly 353 to 355 AD, witnessed early experiments with reduced weights at selected regional mints, where votive formulas such as VOTIS XXV MULTIS XXX were struck on transitional flans hovering between 2.5 and 2.9 grams alongside rare commemorative reverse designs. The second, definitive phase, established between 355 and 358 AD and lasting until the emperor's death in 361 AD, consolidated the uniform standard of 1/144 pound (nominally 2.27 grams). During this terminal period, the VOTIS XXX MULTIS XXXX series was produced in immense quantities across nearly all operational mints. Minor typological variations during this phase include differences in wreath ties, exergual dividers, and the introduction of gemmed diadems in place of pearl fillets. The metric consistency of this later phase established the siliqua standard that continued virtually unaltered under Julian, Jovian, Valentinian I, and Valens.

Circulation Patterns, Hoards, and Archaeological Context

Constantius II reduced siliquae achieved an expansive geographical circulation that persisted for decades beyond his reign. In imperial Britain and northern Gaul, these coins circulated vigorously alongside later fourth-century silver issues of Julian, Valentinian, and the House of Theodosius. Hoard evidence demonstrates that while early siliquae were often hoarded as bullion stores, reduced siliquae functioned as transactional currency in urban markets and military camps. Prominent British hoards, such as the Hoxne Hoard, the Dorchester Hoard, and the Shapwick Treasure, contain hundreds of well-preserved Constantius II reduced siliquae, frequently showing signs of extensive wear or edge-clipping practiced during the fifth century AD to harvest silver bullion. In eastern and Danubian contexts, hoards discovered near frontier fortifications indicate direct military distribution. The high intrinsic purity of the silver also encouraged circulation beyond the formal imperial frontiers, where barbarian populations in Free Germany and the Eurasian steppes accepted them readily in commerce and diplomatic gift-exchange.

References

1. La politique monétaire des empereurs romains de 312 à 425. pp. 350-410
2. The Late Roman Gold and Silver Coins from the Hoxne Hoard. pp. 25-58
3. The Fourth Century Reduced Siliqua in the West. Mélanges de numismatique offerts à Pierre Bastien, pp. 285-300
4. The Roman Imperial Coinage, Volume VIII: The Family of Constantine I, A.D. 337-364. Volume VIII, pp. 1-605