Muhammad ibn al-Zayyat

Muḥammad ibn ʿAbd al-Malik, better known as Ibn al-Zayyāt, was a wealthy merchant who became a court official and served as vizier of the Abbasid caliphs al-Mu'tasim, al-Wathiq, and al-Mutawakkil, from 836 until his downfall and death by torture in 847.