Ahmad ibn Nizam al-Mulk
| Diya al-Mulk Ahmad ibn Nizam al-Mulk | |
|---|---|
| Abbasid Vizier | |
| In office 1122 - 1123/1124 (one year) | |
| Monarch | Al-Mustarshid | 
| Preceded by | Amid al-dawla Jalal al-Din Hasan ibn Ali | 
| Seljuk Vizier | |
| In office 1106/1107 - 1110/1111 | |
| Monarch | Muhammad I Tapar | 
| Succeeded by | Shams al-Mulk Uthman | 
| Personal details | |
| Born | Balkh | 
| Died | 1149/1150 CE Baghdad, Abbasid Caliphate (now Iraq) | 
| Spouse | unknown | 
| Children | unknown | 
| Parent(s) | Father: Nizam al-Mulk Mother: Georgian princess, niece or daughter of Bagrat III | 
| Relatives | 
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Ḍiyaʾ al-Mulk Aḥmad ibn Niẓām al-Mulk (Persian: ضیاءالملک احمد بن نظامالملک), was a Persian vizier of the Seljuq Empire and then the Abbasid Caliphate. He was the son of Nizam al-Mulk, one of the most famous viziers of the Seljuq Empire.