Galerius Gold Aureus, RIC VI Serdica 7b

Monetary Reform and the Diocletianic Gold Standard

The monetary reforms implemented by Diocletian in 294 AD fundamentally reshaped Roman imperial coinage following decades of debasement and runaway inflation during the third century. Central to this stabilization was the re-establishment of the gold aureus at a fixed standard of 1/60th of a Roman pound (libra), yielding a theoretical weight of approximately 5.45 grams. This weight was a marked reform relative to the fluctuating gold standards of the preceding military emperors, providing a predictable, high-purity benchmark for fiscal accounting, taxation, and large-scale state distributions across the empire. Under the Second Tetrarchy, inaugurated upon the formal abdication of Diocletian and Maximian on 1 May 305 AD, this strict metrological discipline persisted. Gold aurei functioned alongside the newly created fractional gold and the heavy silver argenteus, but the aureus retained pride of place as the definitive symbol of imperial majesty and fiscal solvency. Within the Balkan territories governed directly by Galerius, the issuance of gold was strictly controlled by imperial comitatensian authorities. Coins of the RIC VI Serdica 7b type were produced within this carefully managed framework, maintaining the full weight standard of 1/60th of a pound and serving as an instrument of state prestige during a critical period of imperial succession.

Production and the Serdica Mint

The mint of Serdica, located in modern Sofia, Bulgaria, was opened around 303 to 304 AD to provide dedicated fiscal infrastructure for Galerius in his Balkan sphere of operations. Operating as a major administrative hub in the province of Dacia Mediterranea, Serdica lay near crucial strategic transport routes connecting Italy, the Danube frontier, and Thrace. The mint was staffed in part by experienced celatores and moneyers transferred from earlier regional operations, quickly achieving a distinctive stylistic execution characterized by bold, compact portraiture and disciplined epigraphy. Gold production at Serdica was not continuous but episodic, tied to specific political events, accessions, and imperial visits. For the aureus issue RIC VI Serdica 7b, the mint employed specialized gold workshops denoted by the mintmark in the exergue, commonly reading .SM.SD. or SM.SD, which abbreviated Sacra Moneta Serdicae. This formula emphasized that the coinage derived from the sacred palace treasury. Die preparation for gold at Serdica exhibited exceptionally high technical standards, utilizing carefully refined dies to prevent flan distortion and ensure sharp relief, reflecting the mint's status as the principal coin producer for Galerius's court.

Obverse Iconography and Imperial Portraiture

The obverse of RIC VI Serdica 7b presents the laureate head of Galerius facing right. Tetrarchic portraiture deliberately suppressed individualistic physical features in favor of an idealized, blocky physiognomy that projected unity, iron resolve, and communal harmony (concordia) among the imperial rulers. Galerius is depicted with the characteristic cubical skull, trimmed beard rendered in neat stippling, and a heavy, muscular neck that symbolized military strength and administrative vigor. The head is crowned by a laurel wreath tied at the back of the neck with clean ribbon ties falling downward. The engraving style of Serdica during 305 to 306 AD combines rigid Tetrarchic abstraction with high classical relief, creating a portrait of austere authority. Unlike billon coinages that often featured cuirassed or draped busts, the aureus frequently privileged the bare laureate head, recalling traditional Julio-Claudian and Antonine imperial models to reinforce the dynastic continuity and legal legitimacy of the new senior Augustus.

Reverse Iconography and Jovian Theology

The reverse iconography of RIC VI Serdica 7b depicts Jupiter, the patron deity of the senior Tetrarchic house, standing facing left. Jupiter is shown with a chlamys draped over his left shoulder, leaving his muscular torso bare in classical heroic nudity. In his extended right hand he holds a thunderbolt, the instrument of cosmic justice, while his left hand leans on a long sceptre. At his feet to the left stands an eagle, the sacred attendant and messenger of the god, looking upward toward the deity. This iconography directly articulates the political theology of the Tetrarchy. Diocletian had founded the Jovian house (gens Iovia), claiming Jupiter as supreme protector and divine progenitor of the senior emperors. When Galerius succeeded Diocletian as the Jovian Augustus in 305 AD, he inherited this celestial association. The reverse type celebrates Jupiter as Conservator (Preserver), publicly declaring that the authority of Galerius and the tranquility of the Roman world were upheld by the highest divinity of the Roman pantheon.

Epigraphy and Imperial Titles

The obverse legend reads IMP MAXIMIANVS P F AVG, which transcribes as Imperator Maximianus Pius Felix Augustus. In modern scholarship, this legend can cause initial confusion because Maximianus was the imperial nomen shared by both Maximian Herculius and Galerius (whose full imperial name was Gaius Galerius Valerius Maximianus). At Serdica during the Second Tetrarchy, following the retirement of Maximian Herculius, this title unambiguously designates Galerius as the reigning Augustus. The reverse legend is rendered as IOVIS CON-SERVATOR, broken symmetrically across the field above and around the standing deity. The legend is expressed in the genitive case (or an archaic/vernacular dative) dedicating the coin to Jupiter the Preserver, or proclaiming the protection of Jupiter. The letters are cut in clear, classical capital forms characteristic of the Serdica die-engravers, with tall vertical stems and restrained serifs, ensuring unambiguous legibility for an official state audience.

Typological Development and Chronology

RIC VI Serdica 7b occupies a narrow chronological window between 1 May 305 AD and the summer of 306 AD. The starting point is fixed securely by the abdication of Diocletian and Maximian, which necessitated the striking of aurei celebrating Galerius and Constantius I as the new Augusti of the Second Tetrarchy. During his earlier tenure as Caesar (293 to 305 AD), Galerius's coins carried the subordinate title NOB CAES. The assumption of IMP ... AVG on RIC VI Serdica 7b securely places the issue within his elevation as Augustus. Within the Serdica series, RIC 7 is subdivided into variants based on bust style and authority: 7a features the elder Augustus Constantius I, while 7b represents the parallel Jovian issue struck for Galerius. The issue terminated or transitioned following the death of Constantius in July 306 AD, which precipitated the breakdown of the Tetrarchic succession mechanism, the usurpation of Maxentius, and subsequent mint realignments. Consequently, RIC VI Serdica 7b stands as an ephemeral, highly focused emission of the short-lived Second Tetrarchy.

Distribution, Function, and Circulation

Tetrarchic gold aurei did not circulate primarily as everyday currency for market transactions. Because of their high purity and the rigid price regulations attempted under Diocletian's Edict on Maximum Prices, gold coins were held by institutions, elites, and military commanders. The primary function of RIC VI Serdica 7b was fiscal and political: it was produced to pay imperial accessional donatives, provide stipends to senior bureaucratic officials, and finance substantial military commitments along the Danubian limes. Due to their high intrinsic value, aurei were frequently hoarded during the political instability that characterized the years following 306 AD. Hoard finds from the central Balkans, the Danubian basin, and western Roman provinces demonstrate that gold pieces moved through administrative gifting and troop transfers rather than regional commerce. Because many were subsequently melted down or re-coined under Constantine I and Licinius when weight standards shifted further toward the solidus in the 310s AD, surviving specimens of RIC VI Serdica 7b remain limited in number and typically show minimal wear from open circulation.

References

1. The Roman Aurei: An Exhaustive Evaluation with Historical and Metrological Considerations, Volume II. p. 764
2. Studies in the Byzantine Monetary Economy c. 300-1450. pp. 378-380
3. Online Coins of the Roman Empire: RIC VI Serdica 7b. ric.6.serd.7b
4. The Roman Imperial Coinage, Volume VI: From Diocletian's Reform (A.D. 294) to the Death of Maximinus (A.D. 313). p. 491, no. 7b