'Ubayd Allah b. Ziyad Silver Drahm

Monetary and Administrative Context

The development of Arab-Sasanian silver coinage arose from practical administrative requirements following the rapid expansion of early Islamic rule over the former territories of the Sasanian Empire. Because the local population and trade networks were thoroughly integrated into a high-grade silver currency system, early Muslim authorities maintained the existing monetary infrastructure rather than introducing an immediate overhaul. The traditional silver drahm fabric, weight standard, iconographic repertoire, and Middle Persian language were kept in continuous use. During the Sufyanid period of the Umayyad Caliphate, governing viceroys in the eastern provinces possessed the administrative prerogative to place their own names upon the coinage. 'Ubayd Allah b. Ziyad exercised extensive authority over southern Iraq and wide areas of the Iranian plateau during the reigns of caliphs Mu'awiya I and Yazid I. His silver drahms functioned as the core medium for paying Arab tribal troops, financing provincial administrations, and collecting regional taxes, validating the purity and weight of the metal under provincial gubernatorial authority while incorporating concise Arabic pious legends affirming Islamic sovereignty.

Production Standards and Mint Network

Arab-Sasanian silver drahms issued under 'Ubayd Allah b. Ziyad were struck on thin silver flans, with standard catalogue examples measuring approximately 32 millimeters in diameter. While surviving specimens vary widely in mass from under 2 grams to more than 4 grams due to clipping, wear, or irregular blank preparation, the full weight standard centered between 3.90 and 4.10 grams, representing the traditional Iranian mithqal inherited from late Sasanian drachm norms. Individual well-preserved pieces frequently record weights around 3.89 grams. Metallurgical analyses of early Islamic silver indicate that Arab-Sasanian workshops maintained refined silver alloys, with fineness typically exceeding 90 percent silver and often reaching around 95 percent pure silver. The minting enterprise relied upon an extensive provincial infrastructure inherited intact from the Sasanian administrative apparatus. The primary center of output was Basra, recorded on coin dies under the Pahlavi abbreviation BJRA or BCRA, which served as 'Ubayd Allah's seat of government. Additional prominent workshops contributing to his silver emissions included Jayy (GD) in Isfahan, Istakhr (ST) and Darabjird (DA) in Fars, and Nihawand (NY). Local die-cutters preserved established Sasanian epigraphic formulas and portrait conventions, ensuring seamless institutional continuity.

Obverse Iconography

The obverse design displays a right-facing royal bust imitating the late coinage of the Sasanian ruler Khusraw II. The figure wears an elaborate mural crown surmounted by two wings, an astral crescent, and a central star, secured by a diademed band with flowing ribbon ties. The royal portrait is depicted with stylized curls, an earring, and a beaded necklace. Within the field behind the head, the traditional Middle Persian auspicious phrase expresses an invocation for royal splendor. In front of the portrait, the governor's personal name is engraved in Pahlavi script. The central field is enclosed within a beaded border. Outside this inner circle, the wide margin features star-and-crescent motifs positioned at the four cardinal points. Pious Arabic formulas are engraved directly into the margin, providing clear epigraphic evidence of Islamic governance while retaining the visual authority of the pre-Islamic imperial portrait.

Reverse Iconography

The reverse iconography retains the Zoroastrian fire altar design characteristic of late Sasanian silver coinage. In the center of the field stands a stepped fire altar with a slender column and a tiered hearth upon which sacred flames rise. Two standing attendants, depicted as Zoroastrian priests or guards, flank the altar on either side, facing forward or slightly turned toward the fire with ceremonial implements. Above the altar flames appear a crescent to the left and a star to the right. The entire central composition is surrounded by a triple concentric beaded border. In the outer margin, star-and-crescent ornaments are placed at the cardinal axes, often accompanied by small decorative dots or groupings of pellets. The continuation of this Zoroastrian motif on coins issued by Muslim authorities underscores the pragmatic priority of maintaining local commercial confidence and uninterrupted circulation across former Persian domains.

Inscriptions and Epigraphy

The epigraphic structure of this coinage exhibits a bilingual system combining cursive Middle Persian (Pahlavi) with early Kufic Arabic. On the obverse, the field in front of the bust bears the governor's patronymic rendered in Pahlavi as 'wbwyt'l' / Y zyyat'n ('Ubayd Allah i Ziyadan). In the field behind the profile, the standard Pahlavi formula GDH 'pzwt (xwarrah abzud, meaning 'May his splendor increase') is retained from late Sasanian prototypes. In the obverse margin, an Arabic religious legend appears, most frequently the formula bismillah ('In the name of Allah'), commonly accompanied by terminal pellets. On the reverse, the epigraphy is entirely in Pahlavi. The left field indicates the year of production written out in Middle Persian numbers, while the right field bears an abbreviated mint monogram designating the city or provincial workshop. Reading these mint abbreviations requires paleographical analysis of stylized late Sasanian script forms.

Typology, Dating, and Chronological Evolution

The chronological sequence of 'Ubayd Allah b. Ziyad's coinage is primarily tracked through the dates recorded on the reverse dies, which generally follow the Islamic Hijri calendar. The earliest issues appeared following the death of his father Ziyad b. Abihi in 673 (AH 54), when 'Ubayd Allah assumed governance over Khurasan. Production expanded substantially after he was named governor of Basra in AH 55 and subsequently unified the administration of Kufa and Basra under Caliph Yazid I. The peak volume of minting occurred between AH 56 and AH 64 (approximately 675 to 684 AD). While most workshops dated issues in lunar Hijri years, mints in southern Iran, particularly Darabjird, occasionally used the solar Yazdegerd Era. Typological variations across the issue period consist mainly of slight shifts in marginal pellet arrangements, minor orthographic variations in the spelling of the governor's name, and stylistic differences in bust engraving between Iraqi and Iranian die workshops. Regular emissions ceased after the death of Yazid I in AH 64 and the onset of the Second Fitna, though frozen-date and posthumous strikes are recorded through AH 68.

Circulation, Hoards, and Economic Legacy

Silver drahms issued for 'Ubayd Allah b. Ziyad formed a major portion of the circulating silver supply across Iraq, Iran, and Central Asia during the final quarter of the seventh century AD. Due to the high volume struck at Basra and Iranian municipal centers, these drahms circulated widely alongside surviving late Sasanian issues, anonymous Arab-Sasanian types, and contemporary coins struck by political rivals during the Second Fitna, including Abd Allah b. al-Zubayr. Many specimens found along eastern trade routes carry small countermarks applied by local authorities in Sogdiana and Bactria, reflecting their continued commercial utility beyond the caliphate's borders. The series remained in active domestic circulation until the comprehensive currency reforms instituted by Caliph Abd al-Malik between AH 77 and AH 79 (696 to 698 AD). These reforms introduced aniconic, purely epigraphic Arabic dirhams, leading to the systematic withdrawal and reminting of earlier portrait silver.

References

1. ARAB-SASANIAN COINS. Encyclopaedia Iranica, Vol. II, Fasc. 3, pp. 225-229
2. Drachm - 'Ubayd Allah ibn Ziyad (Umayyad Governor - Arab-Sasanian). Type N# 74277
3. Ubayd Allah ibn Ziyad. Governor of Iraq and Khurasan