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.
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.