Constantine I Gold Solidus, RIC VII Thessalonica 12

Monetary Context

The monetary landscape of the late Roman Empire in the second decade of the fourth century AD was defined by the consolidating success of the gold solidus. Instituted by Constantine I around AD 309 to 310 at the mint of Augusta Treverorum (Trier) to replace Diocletian's heavier and increasingly destabilized aureus (struck at 1/60 of a Roman pound), the solidus was anchored at a theoretical weight standard of 1/72 of a Roman pound, or roughly 4.54 grams of exceptionally pure gold. By reducing the nominal mass of the primary gold denomination, Constantine achieved a stable, highly reliable monetary anchor that gradually drove out older gold issues and formed the bedrock of imperial fiscal policy. By AD 317, this denomination was being struck across several regional workshops under Constantinian administration as political and military developments shifted the imperial focus toward southeastern Europe. The minting of gold solidi in this era remained closely tied to immediate imperial presence, dynastic milestones, and major military accessions. Unlike base-metal billon nummi (folles), which circulated broadly among provincial populations for day-to-day transactions, solidi were primarily struck to discharge state obligations. These included military donatives, payments to high-ranking civil officials, and major subsidies. The fiscal apparatus recaptured this coinage through specialized taxes levied in gold bullion, such as the aurum coronarium and payments exacted from municipal senates. Consequently, an issue such as RIC VII Thessalonica 12 functioned not merely as economic tender, but as an emblem of state legitimacy and imperial triumph distributed directly to the empire's administrative and military elite.

Production and Mints

Thessalonica, situated strategically along the Via Egnatia on the Thermaic Gulf, served as one of the preeminent administrative and military centers of the central Balkan peninsula. Originally developed into an imperial residence and capital under the Caesar Galerius during the First Tetrarchy, Thessalonica possessed an experienced mint facility capable of sophisticated die-engraving and large-scale coin production. Following the military confrontations of the Bellum Cibalense in late AD 316 and early 317 between Constantine and Licinius I, the Treaty of Serdica transferred control of the Balkan dioceses (with the exception of Thrace) into Constantine's realm. Constantine's court briefly established itself in the region, bringing an influx of experienced engravers and treasury personnel to reorient the local mint. Gold production at Thessalonica under Constantine followed strict administrative controls to preserve the weight and fineness of the solidus. Specialized gold dies were cut by senior celators whose stylistic treatment reflected courtly, classicizing trends: crisp, shallow relief, carefully balanced lettering, and proportioned anatomical modeling. Although base-metal coinage at Thessalonica was regularly divided across numbered officinae (workshops) indicated by specific mintmark letters such as A, B, or Gamma, gold solidi of this commemorative category were struck in limited, tightly supervised batches, frequently bearing simple exergual marks or mint signatures characteristic of donative presentation strikes. The dies were carefully aligned and operated under rigorous metallurgical oversight, ensuring that the finished pieces adhered strictly to the legal standard of 1/72 pound.

Obverse Design and Iconography

The obverse of RIC VII Thessalonica 12 presents a right-facing portrait of Constantine I depicted with a laurel wreath. Unlike earlier tetrarchic portraiture, which emphasized cubical, heavily abstracted, and intensely militaristic features with square jaws and cropped hair, Constantinian gold coinage of AD 317 reflects an evolving aesthetic shift toward dynastic elegance and individual imperial majesty. Constantine's hair is rendered in orderly, curving locks swept forward along the temples and over the forehead, bound by a slender laurel wreath tied at the nape with dangling ribbons (taeniae). The portrait is truncated cleanly at the neck, focusing viewer attention entirely on the emperor's clean-shaven, youthful visage. The clean-shaven appearance deliberately revived the visual idioms of the Julio-Claudian and Trajanic eras, explicitly distancing Constantine from the rugged, bearded imagery common to third-century soldier-emperors and tetrarchic colleagues. The open, upward-tilted gaze, which later became an explicit feature of Constantine's autonomous heavenward portraits in the AD 320s, begins to appear here in embryonic form, projecting spiritual elevation and supreme civil authority.

Reverse Iconography and Symbolism

The reverse of the solidus presents a sophisticated multi-figure composition that reinforces the ideology of constant victory (Victoria Augusti). Constantine I stands facing left, depicted in classical military dress consisting of a cuirass (lorica) and military mantle (paludamentum) gracefully draped over his shoulders and falling along his back. In his outstretched right hand, the emperor holds a celestial globe, representing universal sovereignty, cosmic dominion, and the territorial expanse of the Roman world restored under his rule. In his left hand, he supports a transverse spear angled downward, symbolizing active military readiness coupled with victorious pacification. Positioned immediately behind the emperor, a winged figure of Victory (Victoria) steps forward to place a celebratory laurel branch or wreath upon his head. Victory is depicted in draped, billowing robes, personifying the divine favor that favored Constantine's arms during the campaigns of AD 316 to 317. The pairing of the victorious emperor receiving a celestial coronation while holding the globe succinctly synthesized traditional Roman triumph with cosmological rulership. This visual metaphor directly assured recipients among the military officer corps and bureaucratic hierarchy that peace and imperial security were maintained through the emperor's martial virtue (virtus).

Inscriptions and Epigraphy

The inscriptions on RIC VII Thessalonica 12 are cut in regular, refined fourth-century epigraphic capitals. The obverse displays the titular legend CONSTAN-TINVS P F AVG, with an attested engraver's break variant reading CONSTANT-INVS P F AVG. The text expands the imperial nomenclature into Latin formulaic titles: Constantinus Pius Felix Augustus, translating as 'Constantine, Dutiful and Fortunate Augustus'. The dual epithets Pius and Felix were long-established elements of imperial titulature, expressing piety toward the state and divine protection, alongside the continuous fortune that validated Constantinian authority. The reverse legend reads VICTORIA CONSTA-NTINI AVG, expanding as Victoria Constantini Augusti ('The Victory of Constantine Augustus'). The inscription provides explicit, direct identification of the reverse scene, attributing the political pacification of the region exclusively to Constantine's military achievements. The epigraphy is characterized by well-proportioned lettering arranged neatly along the circumference of the coin, with legend breaks placed harmoniously around the raised arm and head of Victory. The clarity and consistency of these inscriptions reflect the high standards maintained by the Thessalonican die-cutters during this special emission.

Typology and Chronology

In the typological framework established by Patrick M. Bruun in Roman Imperial Coinage, Volume VII, Thessalonica 12 is placed securely within the issues of AD 317. The year AD 317 was momentous for the Constantinian dynasty: on 1 March 317, at Serdica, an official conciliation was enacted between Constantine and Licinius I, marked by the joint elevation to the rank of Caesar of Constantine's sons Crispus and Constantine II alongside Licinius' infant son Licinius II. This dynastic settlement concluded the first civil war between the two Augusti and necessitated commemorative gold emissions across the newly acquired Balkan mints of Thessalonica and Sirmium. RIC VII Thessalonica 12 represents an early, focused emission within this transitional period. While parallel bronze issues from Thessalonica in AD 317 extensively celebrate the new Caesars with votive inscriptions, the gold solidus series focused directly on the authority of Constantine I himself. Within the wider typological sequence of Balkan gold, RIC Thessalonica 12 stands alongside related reverse types such as VICTORIA AVGVSTI and CONCORDIA AVGG, but remains distinct due to its particular composition of Victory crowning the emperor with a branch. The issue appears to have been produced in limited numbers over a relatively narrow chronological window, primarily centered on the political celebrations and military settlements of AD 317.

Circulation and Monetary Function

Because gold solidi were intrinsically valuable objects containing approximately 4.54 grams of nearly pure gold, their physical movement through everyday market channels was limited. Solidi like RIC VII Thessalonica 12 did not pass through retail marketplaces in the manner of contemporary bronze folles. Instead, they were held as concentrated wealth by imperial dignitaries, provincial aristocrats, and ranking military officers. Struck as part of donative distributions surrounding the settlement of the civil war and the appointment of the Caesars, these coins served as stores of value, elite payment instruments, or bullion reserves. Archaeological and hoard evidence across the Roman world indicates that solidi often circulated over extensive geographic distances and remained in circulation for decades, frequently stored in domestic hoards or military deposits. However, high-grade commemorative gold issues struck in restricted regional mintages could also be melted down by state mints when recollected via taxation, converted into subsequent regular issues, or preserved in private treasuries. The scarcity of surviving specimens of RIC VII Thessalonica 12 today underscores the specialized nature of its original distribution, typical of Constantinian ceremonial gold issues produced immediately after regional territorial integration.

References

1. Monnaie et donativa au Bas-Empire. pp. 71-78
2. Le numeraire d'or de Diocletien a Constantin I (284-337). Monaeta 26, pp. 110-118
3. Online Coins of the Roman Empire: RIC VII Thessalonica 12. ric.7.thes.12
4. The Roman Imperial Coinage, Volume VII: Constantine and Licinius (A.D. 313-337). Thessalonica 12, p. 500