Yazdegerd III

Yazdegerd III was a grandson of Khosrow II and was elevated to the throne at the age of eight in June 632, after the four-year succession crisis that followed Khosrow's murder saw twelve claimants take and lose the crown in rapid sequence. The reign that followed is the closing entry in a sequence: formally 632 to 651, in practice undone in two engagements — the Battle of al-Qadisiyya in 636 cost Iraq and Ctesiphon to the Rashidun Caliphate, and the Battle of Nahavand in 642 ended organised Sasanian resistance on the Iranian plateau. Yazdegerd retreated east through Sakastan and Khorasan, sent embassies as far as the Tang court at Chang'an, and was murdered in 651 outside Merv by a local miller. His silver tells the story without sentiment: the early-reign drachms of 632–636 are standard Khosrow II-template strikes from a working nineteen-mint network running Ctesiphon to Marw, while the year-20 drachms of AD 651 are struck at only a handful of eastern frontier mints — the same regnal-year series, used to document the contraction in real time.

Two separate weights sit on this coinage. First, the year-20 drachms of AD 651 are the closing strikes of the Iranian royal-portrait coinage tradition that runs back through the Sasanians and the Parthians to the Achaemenid sigloi and darics of the sixth century BC, a continuous sequence of more than twelve hundred years in struck metal under named Iranian sovereigns; nothing later — neither the Arab-Sasanian governors nor the Umayyad reform — restores the king's portrait and regnal year in the same form, and the iconography that Ardashir I had fixed in 224 ends, where it ends, on Yazdegerd III's eastern drachms. Second, and more specific to the numismatic record, the regnal-year-and-mint-signature pairs across the reign provide year-by-year documentation of imperial contraction that no other late-antique royal coinage offers in the same granularity: the 19-mint network of the pre-Qadisiyya issues against the 4-mint output of the year-20 strikes is the territorial collapse of the empire, in metal, in the king's own administrative hand.

Key Events

Coinage

Yazdegerd III's silver is read against the rupture of 636 rather than against any change in the coin itself, because the type does not change — the political map under it does. Before al-Qadisiyya, regnal years 1 through 5 (632–636) carry the inherited Khosrow II template: a frontal-shouldered bust right in a winged-and-mural crown surmounted by the korymbos, the diadem-tie behind, the Pahlavi legend reading yzdkrt GDH ʾpzwt ("Yazdegerd, may his glory increase"); the reverse keeps the two-attendant fire-altar of the mature Sasanian standard with the Pahlavi regnal year cut into the left field and the mint signature into the right. These early issues come out of the full working network — Ctesiphon (CT), Bishapur (BYŠP), Hamadan (AY), Susa (SWS), Istakhr (ST), Marw (MRW). After 636 the coin stays the same and the mint list collapses: regnal years 11–20 are dominated by Sakastan (SK), Marw, Herat (HL), Balkh (BHL), and Kerman (KL), and the year-20 strikes of AD 651 are concentrated at the four or so eastern frontier mints that still answered to him administratively. The Khorasan mints continue to strike drachms in his name posthumously into the 660s under the early Arab governors — the opening of the Arab-Sasanian series proper — and Stuart Sears has documented the metrological and stylistic continuity across that handover. Göbl 1971 classifies the reign as Type V; Schindel's SNS volumes on the late-Sasanian and early Arab-Sasanian transition are the working die corpus.

Collecting Guide

Cross-collector demand on Yazdegerd III pulls from two fields that almost no other Sasanian king reaches simultaneously — Islamic-history specialists who buy the post-Qadisiyya years as the obverse of the Arab conquest, and Tang-China collectors who track the reign for the Peroz III refuge thread — and the market organises most usefully by that end-of-dynasty cross-collector tier rather than by mint or grade. Catalogue work runs against Göbl 1971 and the relevant SNS volume, with Stuart Sears's published work on the post-651 Khorasan strikes for the transitional material; NumisLens does not yet maintain a per-king record for the Sasanian sequence. The historical-significance tier sits at the top: regnal-year-20 drachms of AD 651 from the eastern flight mints (Sakastan year 20, Marw year 18–20) are the documentary endpoint of Iranian royal coinage and carry significant collector premium, with documented examples in four figures at CNG, Künker, Roma, and Sincona, and exceptional Sakastan year-20 strikes well past that. The standard eastern-mint silver of regnal years 11–19 is the working middle tier and the realistic entry point — Marw, Herat, and Balkh drachms in clear VF cross the same houses at roughly $400–900. The early-reign drachms (years 1–5) from Ctesiphon and Bishapur are more available and sit in the $150–450 VF band; they read as standard late-Sasanian portrait silver rather than as end-of-dynasty material, and price accordingly. The post-651 Arab-Sasanian Khorasan strikes in his name have a small specialist market of their own and should be catalogued against Sears rather than against Göbl. Bronze pashiz is rare and rarely well-struck.

Market Overview

Supply at the major auction houses is steady on the early-reign Ctesiphon and Bishapur drachms and notably thinner on the post-636 eastern issues, where year-20 strikes in particular appear only a handful of times across a typical auction year. The cross-collector pull is unusual for the series: Islamic-history and early-caliphate specialists buy the post-Qadisiyya years as the obverse of the Arab conquest, and Tang-China collectors track the reign for the Peroz III refuge thread, which keeps a price floor under the late-reign material that the Sasanian-only buyer base alone would not sustain. Provenance from the named Sasanian cabinets (Saeedi, Mochiri, Sunrise) and from the SNS-published holdings lifts hammer materially on year-20 drachms, where authentication and date legibility are the principal value drivers.

Related Resources

Further Reading

• Sasanidische Numismatik, Robert Göbl
• Sylloge Nummorum Sasanidarum — late-Sasanian and Arab-Sasanian transition volumes, Nikolaus Schindel
• Lost Wealth and Forgotten Hoards: Wealth, Trade, and Identity in the Late Sasanid and Early Islamic World, Stuart D. Sears