Julia Domna Silver Denarius, RIC IV Caracalla 391

Monetary Context

The monetary system of the Severan dynasty underwent considerable institutional transformation between the accession of Septimius Severus in AD 193 and the assassination of Caracalla in AD 217. To finance military pay increases, substantial imperial largesse, and monumental public works, the Severan administration reduced the silver content of the imperial denarius. By the beginning of Caracalla's sole reign in AD 211, following the death of his father in York and the subsequent murder of his brother Geta, the denarius maintained an average weight around 3.1 to 3.3 grams, but its metallurgical fineness had fallen to approximately 50 to 55 percent silver, balanced by copper alloying. In AD 215, Caracalla introduced the double denarius, or antoninianus, a radiate silver coin tariffed at two denarii but struck at roughly 1.5 times the denarius weight. Despite this new introduction, the traditional denarius remained a staple denomination of imperial accounting, market transactions, and imperial propaganda. Issues struck in the name of the Augusta Julia Domna formed an essential component of this currency. Domna exercised unprecedented administrative authority, directing imperial correspondence and state petitions, making her prominent appearance on the silver currency a natural projection of dynastic stability and legitimate rule.

Production and Mints

The production of RIC IV Caracalla 391 was concentrated at the principal imperial mint in Rome. Unlike earlier phases of the Severan reign when eastern branch mints operated in cities such as Antioch, Laodicea ad Mare, and Alexandria, the vast majority of regular imperial denarius production under Caracalla's sole reign was centralized in the capital. The mint of Rome possessed the technical infrastructure and skilled engravers necessary to sustain enormous output. Coins were struck from hot cast blanks placed between hand-engraved dies. Die-axis alignment at Rome was predominantly adjusted to roughly six o'clock or twelve o'clock, reflecting systematic workshop practices. Metallurgical analyses of contemporary Rome denarii demonstrate controlled alloying techniques, maintaining an intentionally debased silver-copper recipe across successive production batches. The Rome mint was organized into distinct officinae or workshops, each responsible for assigned imperial portrait types and reverse deities, ensuring balanced delivery of bullion into the state treasuries and rapid dissemination to the army.

Obverse Characteristics

The obverse of RIC IV Caracalla 391 presents a mature right-facing bust of Julia Domna, draped in the imperial stola. The portrait is distinguished by her late Severan coiffure, a substantial evolution from the softer, undulating waves of her early years under Septimius Severus. In this late portrait style, her hair is parted centrally and sculpted into heavy, rigid horizontal ridges across the side of the head, then gathered low at the nape and folded upward into a broad, flattened braided bun. This complex wig-like arrangement, known numismatically as the later or 'second' hairstyle, reflects court trends during the sole reign of Caracalla. The engraving demonstrates high relief and sharp linear definition, emphasizing Domna's dignified maturity. Die engravers varied minor aspects of the drapery folds around the shoulder and neckline, but the core portrait template remains remarkably uniform across the surviving specimens of the issue.

Reverse Iconography

The reverse iconography features the goddess Vesta, draped in a traditional mantle, seated left upon an ornate low seat or throne. In her extended right hand, she holds a simpulum, a ritual ladle used in Roman sacrificial libations. In her left hand, she holds a tall, upright sceptre resting against her side. Vesta was among the most venerated deities in Roman state religion, guarding the eternal flame that preserved the safety, continuity, and purity of the Roman commonwealth. For an empress, association with Vesta highlighted feminine virtus, religious piety, maternal guardianship of the state, and domestic harmony. While earlier Severan issues for Domna frequently depicted Vesta standing before an altar or holding the palladium, the seated pose with simpulum and sceptre conveys quiet authority and divine permanence. The simpulum specifically underscores the empress's active participation in priestly rituals, aligning her prestige with the traditional pontifical duties exercised by the imperial family.

Inscriptions and Epigraphy

The inscriptions on RIC IV Caracalla 391 are concise, formal, and epigraphically diagnostic of the sole reign of Caracalla. The obverse legend reads IVLIA PIA FELIX AVG, rendered clockwise starting from the lower left. This formula represents an important change from her earlier titular legend, IVLIA AVGVSTA, which was used exclusively throughout the joint reign of Septimius Severus and Caracalla. Following the accession of Caracalla as sole emperor, Domna was granted the imperial epithets Pia and Felix, titles previously reserved almost exclusively for male Augusti. The adoption of these honors celebrated her dutiful affection (pietas) toward her son and the good fortune (felicitas) attending her divine favor. The reverse bears the single word VESTA, positioned cleanly across the upper field or divided by the figure's head and sceptre. The lettering is executed in classic Roman square capitals with clear serifs, typical of the mature Severan epigraphic standard at the Rome mint.

Typology and Chronological Sequence

In the standard reference classification of Roman Imperial Coinage, RIC IV Caracalla 391 is catalogued among the issues struck for Julia Domna under Caracalla between AD 211 and AD 217. The transition to the expanded obverse legend IVLIA PIA FELIX AVG took place shortly after the murder of Geta in late December AD 211 or early AD 212, signaling Domna's consolidated station as mater castrorum, mater senatus, and mater patriae. Harold Mattingly and Edward Sydenham grouped this seated Vesta type alongside parallel issues featuring seated or standing allegories such as Pietas, Venus Genetrix, and Pudicitia. The seated Vesta with simpulum and sceptre exists in both denarius and antoninianus formats; the antoninianus equivalent, carrying a crescent below the empress's bust, was introduced during the monetary reform of AD 215. The denarius RIC 391 remained in steady production throughout the period AD 211 to AD 217, terminating abruptly with Caracalla's assassination near Carrhae in April AD 217 and Domna's death shortly thereafter in Antioch.

Circulation, Hoards, and Archaeological Context

Silver denarii of Julia Domna bearing the IVLIA PIA FELIX AVG formula circulated extensively throughout the Roman Empire. Substantial quantities entered the western frontiers of Britannia, the Rhine, and the Danube through military payroll, while civilian markets across Italy and North Africa also integrated the issue into everyday commerce. Numismatic hoard evidence from Roman Britain and the continent, including major deposits such as the Shapwick and Dorchester hoards, demonstrates that denarii of Caracalla and Domna continued to circulate well into the mid-third century AD. Because the intrinsic silver content of Caracalla's coinage was higher than the increasingly debased antoniniani of the AD 240s to AD 260s, these denarii were often selectively hoarded rather than surrendered for lower-grade currency. Wear patterns on recovered specimens range from lightly circulated pieces to heavily rubbed examples, confirming that the type circulated actively for several decades before being committed to the ground.

References

1. Coins of the Roman Empire in the British Museum, Vol. V: Pertinax to Elagabalus. pp. 433-434, nos. 19-22
2. The Metallurgy of Roman Silver Coinage: From the Reform of Nero to the Reform of Trajan Decius. pp. 574-585
3. Coinage in the Roman World: 300 B.C. to A.D. 700. pp. 125-132
4. Online Coins of the Roman Empire: RIC IV Caracalla 391. ric.4.crl.391
5. The Roman Imperial Coinage, Vol. IV, Part I: Pertinax to Geta. p. 273, no. 391