Trajan Sestertius, RIC II Trajan 642

Monetary and Political Context

The sestertius occupied a central position within the monetary system of the High Roman Empire. Valued at one-quarter of a silver denarius or four copper asses, the sestertius was the largest regular-issue base-metal denomination circulating in the Roman world. Its substantial flan and brass composition made it uniquely suited for complex visual programs, effectively operating as an imperial broadsheet that broadcast state ideology, triumphs, and major civic achievements to citizens and provincial populations alike. Under Trajan, who ruled from AD 98 to 117, the Roman monetary authority frequently aligned coinage designs with military milestones. Following his two Dacian wars, which generated vast bullion reserves and stabilized Roman state finances, Trajan initiated a massive offensive campaign on the eastern frontier in late AD 113. By AD 114, Roman forces had invaded Armenia, formally deposing its Parthian-backed monarch and reorganizing the territory into a Roman province. Moving south and east between AD 115 and 116, Trajan's legions annexed northern and central Mesopotamia, marching down the Euphrates and Tigris river valleys to capture Seleucia and the Parthian capital of Ctesiphon. Type RIC II Trajan 642 was commissioned to celebrate this extraordinary expansion of Roman territorial control. The sestertius directly informed the public that two ancient and strategically formidable eastern regions had been subordinated directly to Roman governance, celebrating a geopolitical triumph that pushed the empire to its furthest historical eastern frontier.

Production Technology and Mint Attribution

RIC II Trajan 642 was struck exclusively at the principal imperial mint in Rome. Although Trajan conducted his campaigns in the far east, the production of regular senatorial brass and copper coinage remained centralized in the capital throughout his principate. The dies were crafted by the official celators of the Rome mint, who translated news of eastern victories sent via official imperial dispatches into sculptural relief. The denomination was struck in orichalcum, a golden-toned alloy composed primarily of copper with an intentional zinc component, historically ranging from roughly twelve to twenty percent zinc during the first and early second centuries AD. Blanks were cast in individual molds or open flan trays before being struck between engraved iron or bronze dies while either cold or slightly heated to enhance metal flow. Striking sestertii required substantial mechanical force delivered by heavy sledgehammers, as the flans typically measured between 32 and 35 millimeters in diameter with thicknesses reaching 3 to 4 millimeters. Weights for Trajanic sestertii of this period broadly cluster around 24 to 28 grams, though considerable variation occurs among individual surviving specimens due to manual flan preparation techniques and post-mint corrosion.

Obverse Iconography

The obverse of RIC II Trajan 642 presents a right-facing portrait of Trajan in his mature style. The standard bust type is laureate and draped, often featuring drapery over the far shoulder or across the chest, occasionally with traces of a cuirass beneath. This portraiture reflects the realistic, dignified physiognomy adopted in the emperor's final years: a strong, square jaw, a prominent straight nose, cropped bangs combed flat across the forehead, and visible signs of aging that convey gravitational authority and military discipline. Surrounding the bust is a continuous circular inscription containing the imperial titulature. The celators in Rome achieved an exceptionally high level of portrait relief on this issue, contrasting the stoic maturity of the emperor against the dynamic movement found on the reverse die. The laurel wreath tied with fillets at the nape of the neck serves as an enduring symbol of military victory, directly prefiguring the triumphant narrative displayed on the reverse face of the coin.

Reverse Iconography and Narrative Design

The reverse of RIC II Trajan 642 features one of the most intricate and crowded allegorical compositions in the Trajanic numismatic corpus. At the center stands Emperor Trajan in military dress, depicted standing frontally with his head turned toward the right. He wears an imperial cuirass, a paludamentum (military cloak), and boots, holding a vertical spear in his right hand and a parazonium (a short, ceremonial officer's sword) in his left hand, resting it at his hip. Beneath and around the emperor's feet are three personifications symbolizing the conquered territories. At the left, the personification of Armenia is depicted reclining upon the ground, wearing traditional eastern attire, often characterized by loose trousers and a soft peak-like cap. To the right and below Trajan recline two fluvial deities representing the Tigris and Euphrates rivers. These river gods are shown half-draped, leaning upon overturned water urns from which streams flow, clutching reeds or aquatic attributes. By placing the emperor upright above these three prostrated figures, the die engravers created a vivid visual hierarchy: Rome's commander stands tall and dominant, while the land of Armenia and the great waters of Mesopotamia submit peacefully beneath his authority.

Epigraphy and Legend Analysis

The obverse inscription reads IMP CAES NER TRAIANO OPTIMO AVG GER DAC P M TR P COS VI P P, representing an ablative or dative dedicatory formula common on late Trajanic issues. The titles expand as Imperatori Caesari Nervae Traiano Optimo Augusto Germanico Dacico, Pontifici Maximo, Tribunicia Potestate, Consuli Sextum, Patri Patriae. This translates to: 'To the Emperor Caesar Nerva Trajan, the Best Augustus, conqueror of Germany, conqueror of Dacia, Chief Priest, invested with Tribunician Power, Consul for the sixth time, Father of his Country.' The placement of the title Optimus prominently before Augustus was formally decreed by the Senate in late summer of AD 114 to signal that Trajan had surpassed all previous rulers in civic virtue and imperial benevolence. The reverse inscription is exceptionally forthright: ARMENIA ET MESOPOTAMIA IN POTESTATEM P R REDACTAE, accompanied by the senatorial authorization letters S C (Senatus Consulto) in the field or exergue. The main text translates as: 'Armenia and Mesopotamia brought into the power of the Roman people.' The phrasing deliberately mirrors classical Republican epigraphy, employing the formula in potestatem populi Romani redigere, an archaic legalistic declaration that newly subdued foreign domains were now subject to the sovereign authority of Rome.

Typology and Chronological Placement

Type RIC II Trajan 642 is catalogued under Harold Mattingly and Edward Sydenham's classic typology, as well as in Bernhard Woytek's corpus (MIR 14, type 590). Establishing the exact emission window of this type depends on the specific arrangement of Trajan's imperial titles. The coin securely includes OPTIMO, an honorific officially granted in August AD 114, and COS VI, which Trajan held from January AD 112 until his death in AD 117. Crucially, RIC II Trajan 642 omits the victory title PARTHICVS. The title Parthicus was accepted by Trajan in early AD 116 following the formal capture of Ctesiphon. Later sestertii commemorating the eastern campaigns, such as RIC II Trajan 644 and 647, incorporate PARTHICVS into the obverse legend. Consequently, numismatists place the production of RIC 642 primarily between the annexation of Armenia in AD 114 and the culmination of the Mesopotamian push before the assumption of Parthicus in early AD 116, though a transitional issuance carrying over unrevised obverse dies into AD 116 to 117 remains a recognized possibility in the study of die combinations.

Circulation, Hoard Evidence, and Political Fate

Following their production in Rome, sestertii of this type entered broad circulation across the central Mediterranean, Italy, and the western provinces, where bronze coinage formed the backbone of day-to-day market transactions. Large orichalcum pieces traveled more slowly than silver denarii, but military movements and imperial disbursements ensured their distribution to frontier garrisons along the Rhine and Danube. The geopolitical reality celebrated by RIC II Trajan 642 was remarkably transient. Almost immediately after the capture of Ctesiphon in AD 116, major revolts erupted across Mesopotamia, while Jewish uprisings spread through the eastern Mediterranean. Trajan was forced to retreat, and following his death at Selinus in Cilicia in August AD 117, his successor Hadrian adopted a fundamentally defensive foreign policy. Hadrian immediately withdrew Roman garrisons from Mesopotamia, restored Armenia to client-kingdom status, and established the Euphrates once again as the eastern boundary of the Roman Empire. Consequently, this sestertius circulated as a lasting numismatic record of an ambitious territorial high-water mark that had already dissolved on the ground.

References

1. Coins of the Roman Empire in the British Museum, Vol. III: Nerva to Hadrian. pp. 221-222, nos. 1033-1038
2. Online Coins of the Roman Empire: RIC II Trajan 642. ric.2.tr.642
3. The Roman Imperial Coinage, Vol. II: Vespasian to Hadrian. p. 289, no. 642
4. Die Reichsprägung des Kaisers Traianus (98-117) (MIR 14). no. 590