Al-Mu'ayyad fi al-Din al-Shirazi المؤيد في الدين الشيرازي

997–1078 CE

Chief da'i (missionary) of the Fatimid empire and head of the Dar al-Ilm (House of Knowledge) in Cairo. His 800 theological lectures are the most comprehensive exposition of Fatimid Isma'ili theology. His Persian poetry blends philosophical depth with mystical longing.

Why They Mattered

He systematized Isma'ili intellectual doctrine and managed the Fatimid missionary network that extended across the Sunni world, maintaining the ideological coherence of the Fatimid state.

Intellectual Role

As the chief da'i of the Fatimid empire, al-Mu'ayyad's role was pivotal in the dissemination and systematization of Isma'ili theology. Unlike others in the same position, he emphasized a structured approach to Isma'ili thought, producing extensive theological lectures that would serve as foundational texts for later scholars. His 800 lectures, delivered within the Dar al-Ilm in Cairo, provided a profound and nuanced exposition of Isma'ili beliefs, emphasizing rational thought intertwined with faith. Furthermore, his poetic works reflect an engagement with philosophical themes that balance mys…

Legacy

His theological lectures remain authoritative texts in Isma'ili scholarship. He preserved and transmitted the esoteric philosophical tradition of Isma'ili Islam that continues in the Bohra and Nizari communities.