Trajan Gold Aureus, RIC II Trajan 329 (aureus)

Monetary Context and Imperial Gold Policy

During the principate of Trajan (reigned AD 98 to 117), the Roman monetary system functioned on a bimetallic and trimetallic base anchored by the gold aureus and the silver denarius. The aureus occupied the pinnacle of the denomination hierarchy, valued tariffed at twenty-five silver denarii, one hundred sestertii, or four hundred asses. Trajan inherited a currency system stabilized under the Flavians following Nero's significant monetary reform of AD 64. Under this framework, gold coinage was struck at an average standard of 45 aurei to the Roman pound, giving a theoretical mass of approximately 7.28 grams per coin with exceptional metal purity approaching twenty-four karats. Following the conclusion of the Dacian Wars in AD 106, the Roman treasury absorbed an enormous influx of precious metals from the royal treasuries of Decebalus. This massive windfall allowed Trajan to undertake extensive architectural projects in Rome, finance welfare initiatives such as the alimentary foundations, and recalibrate state expenditures. By AD 114, the imperial administration had turned its geopolitical focus toward the eastern frontier in response to Parthian interference in the succession of the client kingdom of Armenia. The striking of aurei like RIC II Trajan 329 served a dual function within this context: providing concentrated liquidity to support the logistical mobilization of eastern legions and serving as portable vehicles of imperial ideological messaging. Gold aurei were predominantly handled by administrative elites, high-ranking military commanders, and merchants engaged in long-distance trade, making them premier instruments for announcing major political shifts and divine patronage throughout the provinces.

Production and Mint Organization

The entire regular emission of RIC II Trajan 329 (aureus) is attributed to the central imperial mint at Rome. While regional and traveling military mints played prominent roles during specific periods of Roman history, the production of gold aurei under Trajan remained concentrated under the direct supervision of the central senatorial and equestrian financial apparatus in the capital. The officinae (mint workshops) operating in Rome demonstrated remarkable technical mastery, achieving high die consistency, uniform flan preparation, and precise weight maintenance. Die engraving for this issue represents the peak of mature Trajanic portraiture. Artisans utilized hardened bronze or iron dies hand-cut with gravers and punches. Blank flans were cast in molds, trimmed to exact weight specifications, heated, and struck between paired upper (reverse) and lower (obverse) dies set into anvils. Because gold is exceptionally malleable, striking produced sharp relief, rendering intricate details of Trajan's facial anatomy, military cuirass, and the individual rays of Sol's solar crown with meticulous fidelity. Analysis of die linkages across contemporary issues indicates that the Rome mint organized output in coordinated batches, occasionally pairing newly modified reverse dies with established obverse dies or vice versa as titulatures evolved during AD 114.

Obverse Iconography and Imperial Image

The obverse of RIC II Trajan 329 features a right-facing portrait bust of Trajan combining three conventional numismatic attributes: the laurel wreath (corona triumphalis), imperial drapery (paludamentum), and a military cuirass (lorica). The portrait reflects the realistic yet dignified style characteristic of Trajan's later reign, often referred to by art historians as the 'Decennalia' or post-Decennalia imperial type. Trajan is portrayed with his characteristic straight, low-combed fringe of hair across the forehead, a prominent bridge to the nose, a firm chin, and a muscular neck, projecting an image of sober authority, gravitas, and seasoned military leadership. The inclusion of both the cuirass and drapery underscores Trajan's dual persona as commander-in-chief of the legions (imperator) and civic magistrate. The laurel wreath directly recalls his celebrated military triumphs in Dacia and Germania, while also symbolizing divine favor and continuous victory. Unlike earlier Julio-Claudian idealized imagery, Trajanic portraiture on this gold issue projects relentless pragmatic capability, deliberately aligning the emperor's visual identity with the rigorous virtues expected of Rome's military defender.

Reverse Typology: The Radiate Bust of Sol

The reverse of the coin presents a bust of the solar divinity Sol, radiate and draped, facing right. Sol's hair is rendered in classic Hellenistic fashion, styled in loose, curling locks with two distinct long tendrils falling down the side of the neck. Radiating from his head is a crown of prominent solar rays, symbolizing light, vitality, and cosmic dominion. Sol holds an ancient place in Roman religion as Sol Indiges, but during the high empire the deity increasingly acquired cosmic connotations associated with eastern campaigns and universal sovereignty. The deployment of Sol on this aureus in AD 114 possesses potent symbolic resonance. As Trajan embarked on his expedition against the Parthian Empire, an advance toward the lands of the rising sun naturally invited solar imagery. Sol was viewed as an invincible ally (Sol Invictus) whose radiance dispelled darkness and illuminated the path of imperial conquest. Furthermore, pairing the emperor's portrait on the obverse with the radiant bust of Sol on the reverse established a subtle theological parallel between the terrestrial ruler who brings order to the Roman world and the celestial deity who illuminates the cosmos. This thematic pairing anticipated the more pervasive solar theology that became central to third-century Roman imperial representation.

Epigraphy and Titulature

The legends on RIC II Trajan 329 are among the most informative elements of the coin, providing strict chronological and political parameters for the issue. The obverse legend reads: IMP CAES NER TRAIAN OPTIM AVG GERM DAC. This inscription expands to Imperator Caesar Nerva Traianus Optimus Augustus Germanicus Dacicus. The presence of 'OPTIM' marks the formal adoption of the cognomen Optimus, officially conferred upon Trajan by the Senate in the autumn of AD 114 after years of informal use. The title Germanicus honors his pacification of the Rhine frontier in AD 97, while Dacicus commemorates his annexation of Dacia in AD 102 and 106. The reverse inscription is equally significant: PARTHICO P M TR P COS VI P P S P Q R. This expands to Parthico, Pontifex Maximus, Tribunicia Potestate, Consul Sextum, Pater Patriae, Senatus Populusque Romanus. The inclusion of the dative or ablative epithet 'PARTHICO' (or its nominative title) is particularly remarkable for AD 114. While the full victory title Parthicus was celebrated extensively in AD 116 following the capture of Ctesiphon, early iterations of the title began appearing on coinage in late AD 114 as Trajan initiated active campaigning in Armenia and northern Mesopotamia. The traditional constitutional formulae record his supreme religious office (Pontifex Maximus), his annual renewal of tribunician power (Tribunicia Potestas), his sixth consulship (first assumed in AD 112), his designation as Father of his Country (Pater Patriae), and the endorsing formula S P Q R, demonstrating imperial harmony with the Senate and Roman People.

Typological Placement and Chronological Sequencing

Within the standard cataloguing systems of Roman imperial numismatics, this issue is designated as RIC II Trajan 329 in Mattingly and Sydenham's Roman Imperial Coinage. In Bernhard Woytek's specialized corpus of Trajanic coinage, Die Reichspragung des Kaisers Traianus (MIR 14), the issue is catalogued under type 524f. The emission is securely anchored to late AD 114 by the conjunction of Trajan's sixth consulship (COS VI), the adoption of Optimus as an official imperial title, and the initial appearance of the Parthico legend. Numismatists divide Trajan's late coinage into tightly sequential phases based on shifts in obverse and reverse titles. In the earlier months of AD 114, Trajan's coinage lacked the title Optimus. When the Senate decreed the title in late summer or autumn of AD 114, the Rome mint modified obverse legends to incorporate OPTIMUS or OPTIM. Shortly thereafter, the opening of hostilities in the east prompted the inclusion of PARTHICO. RIC II Trajan 329 captures this exact transitional moment. Minor stylistic variations exist in the bust treatment of Sol, particularly in the number of visible rays and the arrangement of drapery folds, but the core typology remains remarkably consistent across surviving dies.

Circulation, Hoard Evidence, and Modern Preservation

As a high-purity gold denomination, RIC II Trajan 329 did not circulate in the casual daily retail market. Instead, aurei functioned as instruments of state finance, store-of-value savings, and cross-border commercial settlement. When Trajan mobilized large army detachments to Syria and Mesopotamia, military stipends and donatives were distributed partly in gold. Consequently, aurei of this series circulated widely through military corridors, traveling from the Rome mint across Italy, through Balkan transit routes, and directly into the Levant and Asia Minor. Hoard evidence indicates that Trajanic aurei enjoyed extended circulation lifetimes. Because Trajan did not debase the gold standard, his aurei retained full intrinsic value and were hoarded alongside earlier Flavian and later Antonine gold pieces. Aurei of Trajan frequently appear in second- and third-century hoards throughout Europe and the Near East, sometimes showing moderate surface wear indicative of decades in commercial circulation or banking vaults before deposition. Today, specimens of RIC II Trajan 329 are preserved across major public collections, including the British Museum, the Cabinet des Medailles in Paris, and the American Numismatic Society, serving as essential reference objects for the visual and political history of the Roman Empire at its territorial zenith.

References

1. Coins of the Roman Empire in the British Museum, Vol. III: Nerva to Hadrian. pp. 101-102, no. 509
2. The Roman Imperial Coinage, Vol. II: Vespasian to Hadrian. p. 267, no. 329
3. Online Coins of the Roman Empire: RIC II Trajan 329 (aureus). ric.2.tr.329_aureus
4. Die Reichsprägung des Kaisers Traianus (98-117). MIR 14, no. 524f