Trajan Orichalcum Sestertius, RIC II Trajan 451

Monetary Context and Denominational Role

During the High Roman Empire, the sestertius occupied a central position within the tripartite monetary system established under Augustus and maintained through the Antonine era. Valued at one quarter of a silver denarius or four copper asses, the sestertius was the primary accounting unit for fiscal calculations, public ledgers, and property assessments across the empire. Produced in orichalcum, a golden-toned brass alloy composed principally of copper and zinc, the sestertius offered an expansive module that enabled detailed iconographic compositions unachievable on smaller silver or copper denominations. In 103 AD, Trajan's monetary administration utilized this broad physical field to disseminate the political and military outcomes of the First Dacian War (101 to 102 AD). The victory transformed imperial finances through captured bullion, though the initial transition to massive monetary redistribution was accompanied by carefully planned issues highlighting both imperial valor and constitutional balance. RIC II Trajan 451 represents a targeted base-metal issue conveying senatorial celebration of the victory, underscoring the return of peace and prestige under the guidance of the princeps.

Mint Attribution and Manufacturing Technique

The entire production of RIC II Trajan 451 was centered exclusively at the imperial mint of Rome, which exercised a functional monopoly over base-metal orichalcum and copper coinage destined for western and central Mediterranean circulation. Metallurgically, sestertii of this period were cast from freshly prepared orichalcum, although slight variations in zinc concentration occurred depending on the proportion of recycled brass entering the melting crucibles. Blanks were cast in individual moulds or sprues, hammered roughly into circular flans while heated, and struck between hand-held intaglio dies aligned manually by mint celators. Trajanic sestertii of the fifth consulship typically conformed to an average weight standard clustering between 24 and 28 grams, with a module measuring approximately 32 to 35 millimeters in diameter, though deliberate target weights were evaluated collectively by batch rather than by individual flan adjustment. The die output for this particular design reflects the high engraving standards of the Roman mint workshops active during the consulship transition of 103 AD, displaying crisp relief, disciplined lettering, and balanced figurative proportions.

Obverse Iconography and Attributes

The obverse of RIC II Trajan 451 presents a right-facing portrait bust of Trajan. The emperor is depicted wearing the laurel wreath (corona triumphalis), tied at the back of the head with ribbons extending down the nape of the neck. Across his shoulders or chest, the portrait features the aegis, a divine attribute borrowed from Jupiter and Minerva consisting of a protective collar or breastplate traditionally fringed with serpents and bearing the head of the Gorgon Medusa. In Roman imperial portraiture, the addition of the aegis to a bust transcended simple decorative drapery, endowing the emperor with divine protection and invincible martial power. Trajan's physiognomy on this emission adheres to the mature 'decennalia' stylistic tradition that began taking shape in 103 AD, characterized by straight, low-cut bangs, a flat cranium, deep-set eyes, and a prominent, firm jawline that projected sobriety, authority, and classical discipline.

Reverse Iconography and Composition

The reverse composition presents an elaborate allegorical scene of military triumph and constitutional devotion. Roma, the divine personification of the imperial city and state, sits enthroned facing to the right, clad in a helmet and classical drapery, typically holding a parazonium or spear resting against her seat. Standing before her is the emperor Trajan in military attire, cuirassed and facing left toward Roma, actively offering or presenting a small statuette of Victory (Victoria). Victory is depicted extending a wreath toward Roma, symbolizing that the triumphant fruits of Trajan's military campaigns are dedicated directly to the majesty and security of the Roman commonwealth. In the field or lower exergue, the traditional formula S C (Senatus Consulto) confirms that the issue was minted by decree of the Senate. The juxtaposition of a victorious emperor deferentially bestowing Victoria upon seated Roma served as an ideological affirmation of the civilis princeps who conquered on behalf of the res publica rather than for personal despotism.

Inscriptions, Titles, and Epigraphy

The obverse legend reads IMP CAES NERVA TRAIAN AVG GERM DACICVS P M, representing a continuous sequence of Trajan's formal nomenclature and official titles: Imperator Caesar Nerva Traianus Augustus, Germanicus, Dacicus, Pontifex Maximus. Notably, the inclusion of DACICVS reflects the triumphal cognomen granted in late 102 AD following the submission of Decebalus, while the retention of GERM recalls his earlier adoption and Rhine victories under Nerva. The reverse legend is rendered as TR P VII IMP IIII COS V P P S C, detailing his magistracies and imperial acclamations: Tribunicia Potestate VII (holding tribunician power for the seventh time), Imperator IIII (acclaimed imperator for the fourth time), Consul V (consul for the fifth time), and Pater Patriae (Father of his Country), alongside the senatorial authorization Senatus Consulto. The precise lettering demonstrates classical Roman epigraphy, utilizing clear serifs, uniform letter heights, and well-spaced abbreviations designed to accommodate the complex titular formula within the circumference of the flan.

Typology, Dating, and Chronological Classification

RIC II Trajan 451 is dated securely to the year 103 AD through the precise intersection of its epigraphic formulae. Trajan entered his fifth consulship (COS V) on January 1, 103 AD, a dignity he held continuously until the assumption of his sixth consulship in 112 AD. However, the seventh iteration of his tribunician power (TR P VII) ran from December 10, 102 AD to December 9, 103 AD, securely isolating the strike date of this issue to the calendar year 103 AD. Furthermore, his fourth imperatorial acclamation (IMP IIII) belongs specifically to the immediate aftermath of the First Dacian campaign. Within the broader classification established by Bernhard Woytek in 'Die Reichsprägung des Kaisers Traianus' (MIR 14), this issue belongs to the transitional emission period marking the introduction of the title Dacicus into bronze issues of Rome before subsequent reverse motifs focused more heavily on infrastructural projects and the Danube bridge. RIC 451 represents a distinct catalogued type defined by the specific combination of the bust with aegis and the reverse scene of Trajan offering Victory to Roma.

Circulation, Wear Patterns, and Archaeological Context

As heavy base-metal currency, orichalcum sestertii of RIC 451 entered circulation across both civil and military sectors of the Roman world. While struck in Rome, substantial quantities of Trajanic bronze were routed to legionary camps along the Rhine and Danube frontiers to support troop logistics and local procurement following the Dacian campaigns. Because orichalcum coins retained substantial intrinsic purchasing power and were subjected to decades of hand-to-hand transactions, surviving specimens frequently demonstrate moderate to heavy surface wear, softening the fine details of the aegis and the facial features of Roma. Hoard evidence from Britain, Gaul, the Rhineland, and the Balkan provinces demonstrates that sestertii of Trajan remained in active circulation for more than a century, appearing regularly in Antonine and Severan coin deposits. Over time, exposure to diverse soil chemistries produced patinas ranging from deep emerald green to smooth dark brown, which frequently obscure fine die details or epigraphic punctuation.

References

1. Coins of the Roman Empire in the British Museum, Volume III: Nerva to Hadrian. Trajan, Sestertii of 103 AD
2. The Roman Imperial Coinage, Volume II: Vespasian to Hadrian. p. 277, no. 451
3. Online Coins of the Roman Empire: RIC II Trajan 451. ric.2.tr.451
4. Untersuchungen zur römischen Reichsprägung des zweiten Jahrhunderts, Teil I: Reichsprägung zur Zeit des Traian. Typenüberblick 103 n. Chr.
5. Die Reichsprägung des Kaisers Traianus (98-117). MIR 14, emission 4