| Al-Musta'sim | |
|---|---|
| 45th Caliph of the Abbasid Caliphate Abbasid Caliph in Cairo |
|
| Reign | 1377,1386–1389 |
| Predecessor |
Al-Mutawakkil I (1377) Al-Wathiq II (1386) |
| Successor |
Al-Mutawakkil I (1377) Al-Mutawakkil I (1389) |
| Died | 1389 |
| Father | Al-Wathiq I |
| Religion | Islam |
Al-Musta'sim (Arabic: المستعصم بالله), also known as al-Mu'tasim (Arabic: المعتصم باالله), served twice (first in 1377, then again in 1386–1389) as Abbasid caliph of Cairo under the tutelage of the Mamluk sultans.