Trajan Imperial Asses (Rome Mint, 98-117 CE)

Historical Context

Trajan succeeded Nerva in January 98 CE and ruled until August 117 CE. His reign encompassed the Dacian wars of 101-102 and 105-106, the annexation of Arabia, extensive public building, and later campaigns in Armenia and Mesopotamia. The imperial as belongs within this changing political setting, but a reverse expressing victory is not by itself a precise date or a complete account of a campaign.

The as was a lower-value unit in the imperial currency, conventionally reckoned as one-sixteenth of a denarius, one-quarter of a sestertius, or half a dupondius. Asses served exchange at a different scale from gold and silver while carrying the same ruler's names and titles. The denomination's public imagery could therefore connect everyday currency with themes of legitimacy, divine favor, and imperial achievement.

Copper is the normal material designation for much of the Rome as series, while bronze often functions as a modern umbrella label for copper-alloy coins. That convention is not proof that every coin was chemically pure copper or made to an invariant recipe. Surface colour after burial cannot supply a metal analysis.

The issues discussed here are principally attributed to Rome. Provincial coinages, including eastern issues with Latin legends, must be identified within their own monetary and mint contexts before being added to this imperial denomination. Neither a familiar portrait nor S C automatically makes an eastern copper-alloy issue a Rome as.

Obverse Iconographic Composition

The usual portrait on the Rome as is a laureate head or bust of Trajan facing right. Short hair brushed forward, a prominent nose, and a strong jaw are recurring features, but their rendering varies between dies. Some early portraits resemble the imagery of Nerva. A stylistic resemblance does not establish an exact month when engravers adopted a new canonical likeness.

Bust varieties include a bare neck, shoulder drapery, more extensive drapery, and an aegis. The amount of shoulder visible and the placement of an aegis are catalogue attributes distinct from the emperor's name or consulship. A worn edge can remove drapery or make its presence uncertain; that uncertainty should not be resolved by selecting the most convenient catalogue number.

Laureate headgear is useful within the as series but is not an absolute denomination test. Sestertii can also show a laureate emperor, while radiate portraits and differences of module require comparison with documented dupondii and other issues. Portrait, reverse, metal evidence, and the full catalogue description must be considered together. Weight and diameter alone are not substitutes for denomination evidence.

Obverse Epigraphy and Inscriptions

The obverse legends use abbreviated Latin names and offices. An early formula is IMP CAES NERVA TRAIAN AVG GERM P M: Imperator Caesar Nerva Traianus Augustus Germanicus, Pontifex Maximus. It names the emperor and his adopted association with Nerva, Augustus status, Germanicus title, and chief priesthood. NERVA or NER is part of the adopted name, not a written statement 'son of Nerva.'

Later formulas can include DAC, for Dacicus, and combine P M, TR P, COS, and P P with the emperor's names. TR P refers to tribunician power, COS to consul, and P P to Pater Patriae, father of the country. Titles may be divided between the two faces. A shortened form should not be expanded into a supposedly observed full legend.

Consular milestones provide a useful framework: COS II belongs to AD 98-99, COS III to 100, COS IIII to 101-102, COS V to 103-111, and COS VI to 112-117. These are periods of office rather than proof that every type was produced continuously throughout each interval.

OPTIMO and PARTHICO distinguish later title combinations. They must not be projected backwards across the whole sixth consulship, which began before their introduction. The exact formula and any case endings, such as TRAIANO, should be transcribed from the type. Dative language can frame a dedication to the emperor, but a complete chronological template cannot be reconstructed from one title alone.

Reverse Iconographic Composition

The as repertoire draws on established imperial imagery while adapting it to Trajan's reign. Victory, divine care, civic well-being, and conquered peoples form related but distinct themes. The figure's attributes and the surrounding legend are necessary for identifying a design rather than relying on the general appearance of a standing or seated personification.

An early Victory composition shows the winged figure moving left, holding a shield inscribed SPQR and a palm. The shield carries an additional inscription within the image, separate from the main reverse legend. It should not be replaced in the description by a wreath merely because Victory has that attribute on another denomination.

The mourning Dacia family depicts a seated figure on a shield or captured arms with a trophy nearby. The image presents conquest through a personified territory. It should not be described as a portrait of a named captive or as evidence that all resistance had ended. Bust variants and the arrangement of the trophy distinguish related catalogue entries.

The wider Trajanic coinage also uses monuments, standards, and additional civic personifications. These themes require independent as records before exact compositions or catalogue assignments are introduced into this denomination's list. An architectural design on a sestertius, aureus, or denarius is evidence for that issue, not automatic proof of a matching as. The distinction allows a broad account of the series without importing every familiar Trajanic image.

Reverse Epigraphy and Inscriptions

Early office formulas can include TR POT COS II P P S C. TR POT abbreviates tribunicia potestate, holder of tribunician power; COS II is consul for the second time; P P is Pater Patriae; S C is Senatus consulto, conventionally by decree of the Senate. These components should be read independently rather than as a single fixed sentence on every die.

On Victory types, S P Q R can also be inscribed on the shield. It expands to Senatus Populusque Romanus, the Senate and Roman people. A shield inscription and a surrounding title formula occupy different parts of the design and can be obscured independently by wear.

S P Q R OPTIMO PRINCIPI S C is a later dedicatory formula: the Senate and Roman people to the best princeps, with the senatorial formula. It appears with the documented mourning Dacia as. The phrase optimus princeps in such a dedication must not automatically be equated with the later incorporation of OPTIMO into every obverse name formula.

Letter placement, line divisions, and abbreviations vary. A gap at the rim is not evidence that P P was deliberately omitted; damaged, off-centre, or weakly struck legends require qualification. Conversely, the possibility of missing letters is not proof that they were originally present. S C is characteristic of imperial aes epigraphy but cannot independently establish denomination, mint, or the Senate's operational control of production.

Typology and Documented Variants

The entire AD 98-117 as series should be approached through successive title groups and individually verified designs, rather than a list generated by copying neighboring sestertius or dupondius entries. Catalogue intervals may be broad, and modern corpora can narrow or rearrange them.

• Early COS II Victory: RIC II Trajan 402 is documented as a copper as at Rome, dated AD 98-99 according to Woytek. It has IMP CAES NERVA TRAIAN AVG GERM P M and TR POT COS II P P S C, with Victory holding an SPQR shield and palm. Its printed MIR 14 concordance is 61a.
• Catalogue concordances depend on the full combination of bust, titles, and reverse design. A documented RIC-to-MIR correspondence applies to that entry, not automatically to a neighboring number. Differences in issue chronology or relative frequency require comparison of the relevant catalogue definitions and a defined body of evidence.
• COS V mourning Dacia: RIC II Trajan 562 is explicitly catalogued as an as, with a laureate, draped bust and aegis; S P Q R OPTIMO PRINCIPI S C accompanies Dacia seated with shield and arms before a trophy. OCRE gives AD 103-111, an issue interval rather than a precise date for every die.

Further groups belong within the reign's later titles and wider civic repertoire, but exact entries for a column, Arabia, standards, or Providentia require their own verified as evidence. A catalogue number or proposed variant requires a matching description of the denomination, bust, legends, and reverse. Scope across the reign and certainty about every proposed type are separate questions.

Scholarly Debates and Attribution Limitations

Denomination leakage is a recurring risk because related reverses appear in gold, silver, and several aes denominations. A correctly named Dacia or Victory figure does not establish an as. Exact catalogue rows require agreement on denomination, bust, legend, and composition. A theoretical size distinction between as and sestertius must not be replaced by narrow supposedly universal observed ranges.

Material attribution likewise requires care. Copper is a conventional designation for many asses, while brass or orichalcum is associated with other denominations. These broad practices do not demonstrate strict chemical purity for every issue. Surface spectroscopy can itself be affected by corrosion and enrichment, so an assertion of composition needs an appropriate analytical method and reported dataset rather than a named technique alone.

Worn legends complicate early COS II classification. P P may be absent, illegible, off the flan, or weakly struck, and those conditions have different implications. A legible title combination can support classification within a catalogue's chronological framework, but wear alone cannot establish when a title was introduced or collapse distinct entries into a single issue. Proposed revisions to attribution require comparison of complete legends, bust details, reverse designs, and documented dies.

Finally, imperial and provincial production must be separated. A Latin legend in the East does not demonstrate a branch workshop producing Rome-standard asses for military pay. Mint geography requires evidence beyond regional findspots or resemblance of portraits. Differences between RIC, BMCRE, and MIR should be recorded as differences between reference systems, with edition and type specified; specimen numbers must not be presented as page numbers.

References

1. Online Coins of the Roman Empire: RIC II Trajan 395. Candidate comparison: RIC II Trajan 395. Its exact concordance is uncertain; the documented RIC II 402 / MIR 61a correspondence does not establish equivalence with 395.
2. Online Coins of the Roman Empire: RIC II Trajan 402. Type ric.2.tr.402
3. Online Coins of the Roman Empire: RIC II Trajan 562. Type ric.2.tr.562
4. The Roman Imperial Coinage, Vol. II: Vespasian to Hadrian. Harold Mattingly and Edward A. Sydenham (1926), RIC II, Vespasian to Hadrian; general catalogue context rather than a page-specific citation.
5. Coins of the Roman Empire in the British Museum, Vol. III: Nerva to Hadrian. Harold Mattingly (1936), BMCRE III, Nerva to Hadrian; general catalogue reference. Specimen numbers and printed page numbers are distinct forms of locator.
6. Die Reichsprägung des Kaisers Traianus (98-117). Bernhard Woytek (2010), MIR 14, Vienna: Austrian Academy of Sciences, two volumes. Linked author's institutional bibliography supplies publication metadata, not the monograph's text or a particular die-study argument.
7. Ashmolean Museum Heberden Coin Room: Trajan As HCR90792. Specimen record HCR90792 (RIC II 402 / Woytek 61a)