Trajan Sestertius, RIC II Trajan 575 (sestertius)

Monetary and Economic Context

Under Trajan, the sestertius retained its traditional role as the foundational large brass denomination within the reformed Augustan currency framework. Valued at one quarter of a silver denarius or four copper asses, the sestertius functioned as the principal daily accounting unit across the Roman Empire and a key instrument for civilian cash payments, military disallowances, state grain allowances, and municipal contracting. The metal composition for imperial sestertii in this era was orichalcum, a copper-zinc alloy known for its bright golden hue when freshly minted, which distinguished it visually and metallurgically from the red copper used for asses and quadrantes. Trajan's extensive military campaigns in Dacia during AD 101 to 102 and AD 105 to 106 yielded immense bullion reserves, yet the imperial treasury simultaneously maintained an aggressive schedule of domestic construction and public distribution in Rome. Within this economic environment, high-denomination aes was struck in considerable volume to facilitate broad municipal expenditure and monumental commemoration. Large copper-alloy coins were particularly well suited to ideological messaging because their generous flans afforded engravers ample space to depict detailed architectural structures and complex figure groupings that would be illegible on silver or gold issues.

Mint Production and Manufacture

The entire production of RIC II Trajan 575 is attributed to the central imperial mint at Rome, which held exclusive authority over the striking of regular senatorial brass issues during this period. Flans were cast in open or two-piece molds to achieve the required thickness and weight before being brought to temperature and struck between hand-carved steel or bronze dies. The heavy weight standard for the Trajanic sestertius generally targeted an average between 25 and 28 grams with diameters ranging from 32 to 35 millimeters, although striking variations and alloy inconsistencies produced noticeable individual variance across surviving dies. The reverse die carving required extraordinary technical proficiency, as the minutely detailed temple facade, multi-figure pediment, and decorative roofline statuary necessitated multi-layered engraving at varying relief depths. Striking was performed by an organized team of mint workers (familia monetalis) who oriented the flans and struck them with heavy iron hammers. The alignment of dies for this series adheres predominantly to the regular medallic or inverted coin turn conventions (approximately six or twelve o'clock), though minor manual rotational deviations are routinely observed in Trajanic bronze.

Obverse Iconography and Variations

The obverse displays an imposing, right-facing portrait bust of the emperor Trajan. The ruler is shown wearing the laurel wreath of victory, with the ribbon ties trailing gracefully down the nape of the neck. In accordance with the standard variety recorded for this catalogue entry, the truncation of the bust features drapery placed across the left shoulder, creating a subtle contrast of military dress with the civic austerity of the portraiture. In certain select dies, an aegis is indicated upon the shoulder, an iconographic attribute linking the princeps directly to the divine aegis of Jupiter and Minerva. Trajan's facial features are rendered in the distinctive realistic style of his middle reign, marked by a low forehead, straight close-cropped hair combed forward in neat strands, a firm aquiline nose, prominent chin, and a calm, determined expression. This portraiture represents a deliberate departure from the ornate classicism of the Flavian dynasty, projecting instead the austere gravitas of a veteran soldier and a dutiful civil magistrate.

Reverse Architectural Design and Symbolism

The reverse design of RIC II Trajan 575 is celebrated for its elaborate architectural composition, depicting a grand octastyle temple set atop a stepped podium. Within the central intercolumniation, a cult statue of Pax stands facing front or slightly left, holding a branch of peace in her right hand and a cornucopia or transverse scepter in her left arm. The surrounding temple superstructure is rendered with exceptional architectural fidelity. An elaborate triangular pediment crowns the entablature, containing a sculpted relief of Jupiter seated majestically between two reclining personifications or river deities. Above the pediment, the apex and corners of the roofline are adorned with five statues, including central figures and corner acroteria. Scholarly debate has long centered on the exact identification of this edifice. While traditionally associated with the Flavian Templum Pacis restored by Trajan, the octastyle peristyle has alternatively been viewed as an idealized temple dedicated to the imperial peace, or an unlocated Trajanic restoration of a classical sanctuary in Rome. The design conveys the enduring restoration of civil tranquility achieved directly through the military strength of the princeps.

Epigraphy and Inscriptional Content

The obverse legend reads IMP CAES NERVAE TRAIANO AVG GER DAC P M TR P COS V P P, inscribed continuously along the outer perimeter starting from the lower left. Rendered in full Latin epigraphy, this expands to Imperatori Caesari Nervae Traiano Augusto Germanico Dacico, Pontifici Maximo, Tribunicia Potestate, Consuli Quintum, Patri Patriae. The inscription presents Trajan's lineage through adoption from Nerva, his victory cognomina Germanicus and Dacicus, his religious supremacy as chief pontiff, his civil authority via the tribunician power, his fifth consulship, and his title as father of the country. The reverse legend features the famous civic acclamation S P Q R OPTIMO PRINCIPI, expanding to Senatus Populusque Romanus Optimo Principi (The Senate and the Roman People to the Best of Princes). Trajan was formally granted the title Optimus Princeps by the Senate, and this legend became the hallmark motto of his middle and late coinage. Flanking the temple in the lower fields is the abbreviation S C for Senatus Consulto, certifying that the bronze issue was struck by official decree of the Senate.

Typology and Chronological Classification

Within the broader typology of Roman imperial bronze coinage, RIC II Trajan 575 belongs to the prolific fifth-consulship phase of Trajan's reign, spanning approximately AD 103 to 111. The inclusion of the title DAC confirms that the coin was designed after the conclusion of the First Dacian War in late AD 102, while the consular number COS V establishes that it was minted prior to Trajan assuming his sixth consulship on January 1, AD 112. Bernardo Woytek's comprehensive study of Trajan's coinage, Moneta Imperii Romani 14, refines this extensive chronological window by analyzing bust styles, legend breakdowns, and reverse pairings across the Optimo Principi period, placing the temple series in the middle of this consular tenure, approximately AD 105 to 108. The temple design appears across multiple denominations and die combinations, with slight variations in the bust arrangement (such as bare, draped, or aegis-adorned shoulders) and minor shifts in the treatment of the temple pediment sculptures, delineating distinct die groups within the Rome mint's officinae.

Circulation, Wear, and Archaeological Context

As a principal bronze denomination of the high empire, the sestertius circulated extensively throughout Italy and the western provinces, including Gaul, Hispania, Britain, and along the Rhine and Danube frontiers. Archaeological excavation data and coin hoard analyses indicate that high-value aes denominations tended to remain in circulation for decades, often staying in active use until the mid-to-late third century AD. Consequently, many surviving specimens show pronounced circulation wear, flattening the fine details of the pedimental figures and temple columns. Due to the high zinc and tin content in Roman brass, buried specimens frequently developed thick green, brown, or olive patinas depending on the soil chemistry of their deposition environment. The substantial flan size and memorable architectural subject matter made this particular issue a recognized and durable medium of civic art, carrying the image of Rome's monumental architectural renewal deep into provincial markets.

References

1. Coins of the Roman Empire in the British Museum, Vol. III: Nerva to Hadrian. Trajan, Aes issues of Cos V
2. The Roman Imperial Coinage, Vol. II: Vespasian to Hadrian. p. 284, no. 575
3. Online Coins of the Roman Empire: RIC II Trajan 575 (sestertius). Type ric.2.tr.575_sestertius
4. Die Reichsprägung des Kaisers Traianus (98-117) (MIR 14). MIR 14, Typenverzeichnis Trajan