Al-Mustazhir
| Al-Mustazhir المستظهر | |
|---|---|
| Khalīfah Amir al-Mu'minin | |
| 28th Caliph of the Abbasid Caliphate Abbasid Caliph in Baghdad | |
| Reign | 3 February 1094 – 6 August 1118 |
| Predecessor | Al-Muqtadi |
| Successor | Al-Mustarshid |
| Born | April/May 1078 Baghdad, Abbasid Caliphate |
| Died | 6 August 1118 (aged 40) Baghdad, Abbasid Caliphate |
| Burial | Baghdad |
| Consort |
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| Issue |
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| Dynasty | Abbasid |
| Father | Al-Muqtadi |
| Mother | Tayf al-Khayal |
| Religion | Sunni Islam |
Abu'l-Abbas Ahmad ibn Abdallah al-Muqtadi (Arabic: أبو العباس أحمد بن عبد الله المقتدي) usually known simply by his regnal name Al-Mustazhir billah (Arabic: المستظهر بالله) (b. April/May 1078 – 6 August 1118 d.) was the Abbasid Caliph in Baghdad from 1094 to 1118. He succeeded his father al-Muqtadi as the Caliph. The main and important events during his reign are; appearance of the First Crusade in Western Syria, Muslim protest in Baghdad against crusaders, his efforts to help Mawdud to organize several expeditions to reconquer lands from the Crusaders.