Valentinian II Gold Solidus, RIC IX Treveri 90A

Monetary Context and Denominational Role

The solidus constituted the fiscal foundation and monetary anchor of the late Roman Empire from its introduction under Constantine I in the early fourth century AD through the collapse of the western administration. Maintained at a legal standard of 1/72 of a Roman pound (approximately 4.50 grams) of high-purity gold, the denomination retained exceptional stability in purity and metrological execution. In the late fourth century AD, the solidus performed crucial economic functions: it served as the required currency for imperial tax collection, the medium for major commercial transactions, and the primary vehicle for political donatives disbursed to the civil administration and military forces. RIC IX Treveri 90A was produced within the turbulent geopolitical framework following the civil war of AD 388. In that year, the eastern Augustus Theodosius I campaigned westward to suppress the usurper Magnus Maximus, who had seized Britain, Gaul, and Spain in AD 383 and subsequently invaded Italy in AD 387. After Maximus was captured and executed near Aquileia in the summer of AD 388, Theodosius reinstated the teenage Valentinian II as senior Augustus in the West. Although nominally sovereign over the western provinces, Valentinian II remained in a precarious domestic position, residing at Vienne under the practical oversight of the Frankish general Arbogast. Gold issues struck at Trier in this interval, such as RIC IX Treveri 90A, functioned directly to reaffirm the legitimacy of the dynasty, settle the accounts of the western military units, and demonstrate the financial normalization of the Gallic provinces.

Production Standards and the Trier Mint

Augusta Treverorum had served as a primary imperial capital and mint for the western empire across the fourth century AD, operating extensive workshops for gold, silver, and bronze coinage. Following the suppression of Magnus Maximus in AD 388, imperial control over the Trier workshops was restored to legitimate authorities acting on behalf of the collegiate emperors: Valentinian II, Theodosius I, and the child Arcadius. Gold solidi of this period were produced in carefully monitored officinae under strict administrative regulations designed to guarantee metallic fineness and standard weight. Solidi of type RIC IX Treveri 90A adhere to the standard module of approximately 20 to 22 millimeters in diameter, struck from fine gold dies of refined style. The Trier mintmark appearing in the reverse exergue is TROBS. The element TR represents the mint name Treveri, while OBS reflects a combination of the Greek numeral mark for the imperial workshop system or regional administrative unit and the Latin abbreviation OB, signifying obryzum (refined, tested gold), reinforced by the numeral mark signifying 1/72 of a pound (seventy-two represented in Greek numerals as omicron-beta). This explicit quality mark assured recipients across the empire of the metal's uncompromised standard.

Obverse Iconography and Imperial Portraiture

The obverse of RIC IX Treveri 90A presents a right-facing bust of Valentinian II. The emperor is shown draped and cuirassed, wearing the imperial pearl diadem. The diadem consists of a double strand of pearls separated by metal beading, tied at the nape of the neck with ribbon-like pendilia hanging downward. This diademed presentation had stood as the exclusive insignia of the legitimate Augustus since the reign of Constantine I, communicating divine favor and supreme autocracy. The portraiture on this Trier issue reflects the stylized, idealized conventions characteristic of late fourth-century Roman court art. Rather than displaying naturalistic individual facial features, the youthful Valentinian II is rendered with large, almond-shaped eyes, an arched nose, and a placid, solemn countenance intended to express transcending imperial majesty rather than mortal age. Die engravers at Trier during this post-Maximus phase exhibited high technical proficiency, producing balanced relief and finely detailed drapery folds over the cuirass.

Reverse Iconography: Concordia and Victory

The reverse of RIC IX Treveri 90A depicts two emperors seated side-by-side upon a shared curule bench or imperial throne. Both figures are shown facing forward, draped in consular or imperial robes, with their heads encircled by circular nimbi (halos), an artistic attribute signifying sacred, divinely protected imperial status. Together, their hands rest upon a central globe, symbolizing universal dominion over the Roman world. Above and between the emperors appears the upper torso of Victory, depicted frontally with outspread wings, her presence consecrating the sovereign alliance. Below the emperors, seated in the lower center between their legs, is a single upright palm branch, an ancient emblem of triumph and divine blessing. A diagnostic stylistic detail noted in the classification of RIC IX Treveri 90A is that the draped robes of the emperors fully cover both of their legs, distinguishing this specific variety from earlier or contemporaneous variants where one leg of each figure remains bare. The visual program deliberately presents a message of harmonious collegiality (concordia augustorum), representing the unified rule between the senior western Augustus Valentinian II and the eastern sovereign Theodosius I.

Inscriptions and Epigraphic Analysis

The obverse legend on RIC IX Treveri 90A is rendered as D N VALENTINI-ANVS P F AVG, broken around the crown of the head. The formula represents the standard late imperial titic sequence: D N abbreviates Dominus Noster ('Our Lord'), emphasizing the absolute position of the sovereign over the state; VALENTINIANVS provides the personal imperial name; P F denotes Pius Felix ('Pious and Fortunate'), declaring religious devotion and divinely guided good fortune; and AVG concludes with Augustus, the supreme titular rank. The reverse inscription reads VICTOR-IA AVGG, with a clear hyphenation break above the head and wings of Victory. The word Victoria proclaims imperial victory, while the terminal double G in AVGG is the grammatical abbreviation designating two Augusti reigning simultaneously. This plural ending underscored the collegiate rule shared by the emperors. In the exergue, the mintmark TROBS explicitly identifies the mint of Trier and certifies the standard of pure gold.

Typology and Relative Chronology

The Two Emperors seated reverse type was first popularized under Valentinian I and Valens and became one of the most prominent gold reverse designs in the late empire. Following the recapture of Trier from Magnus Maximus in AD 388, the mint resumed production of this traditional dynastic type in order to advertise the restoration of order and unity. Type RIC IX Treveri 90 constitutes a broad emission struck between AD 388 and 392 across multiple titular authorities, categorized into distinct sub-entries based on the obverse subject: 90A belongs to Valentinian II, 90B to Theodosius I, and 90C to Arcadius. Within the specific sub-type 90A, minor stylistic nuances in the engraving of the palm branch, the width of the throne, and the precise arrangement of drapery folds over the lower limbs distinguish individual die varieties. Chronologically, this emission ceased abruptly in May AD 388 following the sudden death of Valentinian II at Vienne, an event commonly attributed to assassination by or suicide provoked by Arbogast. In August AD 388, Arbogast elevated the rhetorician Eugenius to the purple, initiating a new and distinct phase of coinage at Trier and closing the emission of RIC IX Treveri 90A.

Circulation, Hoard Evidence, and Historical Aftermath

Gold solidi struck at Trier under Valentinian II circulated throughout the western administrative diocese and across the broader Mediterranean basin. Because the solidus served as international bullion currency, specimens traveled freely along trade routes, accompanied military payments, and formed the principal component of major late Roman precious-metal hoards discovered in Gaul, Britain, northern Italy, and along the Rhine frontier. Hoards containing solidi of this period, such as those buried during the political upheavals of the 390s and the early fifth century AD, demonstrate that Trier issues circulated alongside contemporary gold coins from Milan, Rome, and Constantinople. The production of RIC IX Treveri 90A represents one of the final significant moments of regular imperial gold striking at Trier. When civil conflict resumed under Eugenius and subsequent invasions disrupted the Rhine border, the center of western imperial administration and gold coinage shifted permanently south of the Alps to Mediolanum (Milan) and Ravenna, leaving the late Trier solidi of Valentinian II as important monuments of late fourth-century Gallic mint history.

References

1. Les monnaies d'or de Constantin II a Endoxie (312-450). Trier, nos. 54-57
2. Online Coins of the Roman Empire: RIC IX Treveri 90A. ric.9.tri.90A
3. The Roman Imperial Coinage, Volume IX: Valentinian I to Theodosius I. pp. 29-30, no. 90a