Divine Legitimation in Gold: The Nomisma of John I Tzimiskes

Historical Context

Following the palace coup and assassination of Emperor Nikephoros II Phokas on the night of 10–11 December 969 CE, John I Tzimiskes (Iōannēs Kourkouas, surnamed Tzimiskes, c. 925–976 CE) assumed supreme authority over the Byzantine Empire. Confronted with canonical penalties imposed by Patriarch Polyeuktos of Constantinople - who barred the new ruler from entering Hagia Sophia until he punished the conspirators and exiled Empress Theophano - John initiated an immediate program of political and spiritual rehabilitation.

To consolidate his constitutional standing, John retained the youthful Macedonian heirs Basil II and Constantine VIII as titular co-emperors (symbasileis), while legally incorporating himself into the ruling dynasty through his marriage to Princess Theodora, daughter of Constantine VII Porphyrogennetos. Tzimiskes established himself as an exceptionally capable military commander, decisively defeating Prince Sviatoslav I of Kiev at the Siege of Dorostolon in 971 CE to annex eastern Bulgaria, and campaigning across Syria and the Levant in 974–975 CE before his sudden death in January 976 CE.

Because his accession was tainted by regicide, John sought divine sanction through visual media. On the base-metal coinage, he introduced the "Anonymous Folles" (Class A1), replacing imperial portraits with images and inscriptions of Christ. On the gold nomismata, John set aside the living Macedonian co-emperors in favor of a celestial tableau: the Mother of God personally crowning the emperor, with the transaction confirmed from above by the Hand of God (Manus Dei).

Obverse: Iconographic Composition

The obverse is devoted to the facing bust of Christ Pantokrator (Christ the Almighty), following the established Macedonian imperial type. Christ is depicted with a trimmed beard and long hair parted in the center, wearing an inner tunic (chiton or colobium) and a draped mantle (himation or pallium).

Encircling Christ's head is the cruciform nimbus (nimbus cruciger), an attribute reserved exclusively for divinity. Within each visible arm of the cross, fine engraved pellets (typically two pellets per limb) embellish the design. Christ raises His right hand before His chest in the traditional gesture of benediction, with fingers positioned according to Byzantine ecclesiastical custom. In His left hand, He holds an ornate, jeweled codex of the Gospels, embellished with raised pellet borders arranged in lozenge or square patterns. The composition is enclosed within a fine circular border of beads.

Obverse: Epigraphy and Inscriptions

• Legend: + IhS XIS REX REGNANTIhM (with common die variants such as REGNANTInm and RЄςNANTIhM)
• Script: Mixed Greco-Latin monumental capitals, retaining traditional Latin letterforms combined with uncial Greek shapes (h for Latin H or uncial E, and ς or lunate C for G).
• Language: Latin.
• Transliteration: + I[ēsu]s Ch[ristu]s Rex Regnantium.
• Translation: "Jesus Christ, King of those who reign" (or "King of Kings").
• Epigraphic Placement: Continuous circular legend beginning in the lower-left field (at approximately 7 to 8 o'clock) and proceeding clockwise within the outer beaded border. The formula preserved the traditional Latin acclamation introduced under Justinian II, retained on Byzantine gold long after Greek had become the sole administrative language of the empire.

Reverse: Iconographic Composition

The reverse features a narrative coronation composition rendered through two facing half-length figures:

1. Emperor John I Tzimiskes (on the viewer's left): Depicted facing, bearded with a mustache, wearing an imperial crown surmounted by a cross and fitted with pearl-strung pendilia flanking the temples. He is attired in the ceremonial loros, an ancient consular scarf embroidered with pearls and precious stones arranged in rectangular segments. With his left hand, the emperor grasps the shaft of a long patriarchal cross erected between the two figures. Directly above his head, extending from a celestial segment of sky at the upper border, the Manus Dei (Hand of God) descends in a gesture of divine blessing.
2. The Virgin Mary (Theotokos) (on the viewer's right): Depicted facing, nimbate, attired in a stola and the maphorion (a veil covering the head and shoulders). Her right arm is extended across the upper field, placing or touching the crown atop the emperor's head.

Reverse: Epigraphy and Inscriptions

• Peripheral Inscription: + ΘEOTOC bOHΘ' IⲰ dESP (with documented terminal abbreviations dES and dЄSP)
• Script: Byzantine Greek majuscule with uncial forms (b for beta, d or δ for delta, and Ⲱ or ω for omega).
• Language: Byzantine Greek.
• Transliteration: + Theotoke boēthei Iōannē despotē.
• Translation: "Mother of God, help the despot [emperor] John".
• Placement: Peripheral legend commencing at the lower left and running clockwise along the outer beaded rim.
• Field Inscription: M Θ (regularly surmounted by horizontal abbreviation strokes or macrons).
• Script: Greek majuscule.
• Language: Greek.
• Transliteration: M[ētēr] Th[eou].
• Translation: "Mother of God".
• Placement: Arranged across the upper-right field above the halo and shoulders of the Virgin Mary.

Typology and Documented Variants

Gold nomismata of John I Tzimiskes struck at the mint of Constantinople are categorized by numismatists into three primary classes:

1. Histamenon Nomisma with Plain Cross (DOC III.2, no. 2; Sear 1786):

   • Typological Marker: John holds a long Latin cross with a single horizontal bar rather than a double-barred patriarchal cross.
   • Metrological Target: Full histamenon weight standard (~4.35–4.45 g; flan diameter ~22–23 mm).
   • Chronological Assignment: Regarded by Grierson and Sear as the initial gold issue of the reign, struck c. 969–970/971 CE.

2. Histamenon Nomisma with Patriarchal Cross (DOC III.2, no. 3; Sear 1785):

   • Typological Marker: John holds a long patriarchal cross featuring two horizontal transoms.
   • Metrological Target: Struck on a broad flan to the standard histamenon weight (~4.40–4.50 g; diameter ~21–23 mm).
   • Chronological Assignment: The principal gold issue struck during the middle and later years of the reign (c. 970/973–976 CE).

3. Tetarteron Nomisma with Patriarchal Cross (DOC III.2, no. 6a; Sear 1789):

   • Typological Marker: Iconographically indistinguishable from the patriarchal cross histamenon, displaying the Virgin crowning John holding a patriarchal cross.
   • Metrological Target: Intentionally struck to the reduced lightweight standard (~4.00–4.15 g), typically utilizing a slightly narrower, thicker module (~19–21 mm).
   • Chronological Assignment: Struck alongside the full-weight histamenon in the mid-to-late reign.

Scholarly Debates and Attribution Limitations

Economic Purpose of the Tetarteron

The introduction and maintenance of the dual nomisma standard by Nikephoros II Phokas and John I Tzimiskes has generated substantial numismatic debate:

• The Fiscal Exploitation Model: Byzantine chroniclers contemporary or near-contemporary to the Macedonian era, including John Skylitzes and Michael Psellos, asserted that the lightweight nomisma was an exploitative fiscal device. In their accounts, the imperial treasury paid state disbursements, donatives, and military wages in the lighter tetarteron while demanding taxes and dues in the full-weight histamenon.
• The Commercial Alignment Model: Modern economic studies by Philip Grierson and Michael F. Hendy demonstrated that the alloy of the tetarteron remained at the same high gold fineness (~24 karats) as the histamenon. Hendy argued that the target weight of the tetarteron (~4.13 g) aligned closely with the contemporary Fatimid and Abbasid gold dinar (~4.15–4.20 g). Following major Byzantine conquests in northern Syria and Cilicia under Nikephoros II and John I, the tetarteron functioned as an exchange-compatible unit for Near Eastern frontier trade without disrupting domestic accounting.

Chronological Precision

Because Byzantine gold coins do not bear regnal years or indictions, chronological sequences within the reign remain working hypotheses based on die linkages and hoard composition rather than dated milestones.

Attribution Parameters for Museum Specimen CMA 1968.61

Specimen 1968.61 in the Cleveland Museum of Art is documented with an institutional diameter of 2.3 cm (7/8 in.) and an institutional weight of 4.5 g (0.16 oz.). The coin entered the museum collection as a gift of William Mathewson Milliken in memory of his father, Thomas Kennedy Milliken. Metrologically, its recorded weight of 4.5 g and module diameter of 23 mm align with the full-weight histamenon range (~4.40–4.50 g) and stand apart from the reduced tetarteron standard (~4.00–4.15 g). While its design of John holding a patriarchal cross corresponds typologically to DOC III.2, no. 3 and Sear 1785, institutional specimens in research publications must be characterized by their recorded institutional data and discussed in comparison to the series typology rather than uncritically locked into a single catalogue subtype.

References

1. Nomisma with John I Zimisces. The Cleveland Museum of Art, Accession No. 1968.61 (1968.61.a/b)
2. Catalogue of the Byzantine Coins in the Dumbarton Oaks Collection and in the Whittemore Collection, Vol. 3, Part 2: Basil I to Nicephorus III (867–1081). pp. 588–593, Pl. XLII, nos. 1–6
3. Byzantine Coins and Their Values (2nd ed.). pp. 336–337, nos. 1785–1789
4. Studies in the Byzantine Monetary Economy c. 300–1450. pp. 505–510
5. The History of Leo the Deacon: Byzantine Military Expansion in the Tenth Century. Books VI–X