| al-Musta'sim Billah المستعصم بالله | |||||
|---|---|---|---|---|---|
| Khalīfah Amir al-Mu'minin | |||||
 Dinar minted under al-Musta'sim's rule | |||||
| Caliph of the Abbasid dynasty | |||||
| Reign | 5 December 1242 – 20 February 1258 (15 years 2 months 15 days) | ||||
| Predecessor | al-Mustansir | ||||
| Successor | Position abolished al-Mustansir bi'llah (caliph of Cairo) | ||||
| Born | 1213 Baghdad | ||||
| Died | 20 February 1258 (aged 45) Baghdad | ||||
| Burial | |||||
| Consort |
| ||||
| Issue | Abu'l-Abbas Ahmad[2] Abu'l-Fadaʿil Abd al-Rahman[2] Abu'l-Manaqib al-Mubarak[2] Fatimah Khadijah[2] Maryam[2] A'ishah[2] Karimah[2] | ||||
| |||||
| Dynasty | Abbasid | ||||
| Father | al-Mustansir | ||||
| Mother | Hajir[3] | ||||
| Religion | Sunni Islam | ||||
Abu Ahmad Abdallah ibn al-Mustansir bi'llah (Arabic: أبو أحمد عبد الله بن المستنصر بالله), better known by his regnal title Al-Mustaʿṣim bi-llāh (Arabic: المستعصم بالله; 1213 – 20 February 1258), was the 37th and last caliph from the Abbasid dynasty ruling from Baghdad. He held the title from 1242 until his death in 1258.