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Dirham - al-Ma'mun with the name of the heir al-Rida
| Issuer | Abbasid Caliphate |
|---|---|
| Year | 813-833 |
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| Currency | Dinar (750-1517) |
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|---|---|
| Obverse script | Arabic |
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| Reverse lettering | محمد رسول الله / المأمون / علي ولي عهد المسلمين |
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| Additional information |
Al-Ma'mun's decision to name the Alid imam Ali al-Rida as his heir in 817 CE was one of the most politically explosive acts of his reign — a deliberate attempt to reconcile the Abbasid caliphate with Shia sentiment following the bloody civil war against his brother al-Amin. Coins struck with al-Rida's name alongside al-Ma'mun's are historically confined to a narrow window; al-Rida died in 818, under circumstances widely suspected as poisoning ordered by al-Ma'mun himself after the political gambit collapsed under Abbasid establishment pressure.
Album 224 distinguishes these pieces from the broader al-Ma'mun coinage precisely because of that name. Mint and date combinations within this type vary considerably.