Al-Mu'ayyad fi'l-Din al-Shirazi
Al-Mu'ayyad fid-din Abu Nasr Hibat Allah b. Abi 'Imran Musa b. Da'ud ash-Shirazi (1000 CE/390 AH - 1078 CE/470 AH) was an 11th-century Isma'ilism scholar, philosopher-poet, preacher and theologian of Persian origin. He served the Fatimid Caliph-Imām al-Mustansir Billah as a Da'i in varying capacities, eventually attaining the highest rank of Bab al-Abwab "The Gate of Gates" and Da‘i al-Du‘at "Chief Missionary" in the Fatimid Da‘wah. In his theological and philosophical writings he brought the Isma'ili spiritual heritage to its pinnacle.
Hibatullah ibn Musa Abu Nasr al-Mu'ayyad fi d-Din ash-Shirazi
|Born||1000 CE / 390 AH|
|Died||1078 CE / 470 AH|
Al-Mu'ayyad was born in Shiraz not later than 387/997 and died in Cairo Shawwal,470 AH/ 1078 AD. He lived during the time of the Fatimid Caliphs Al-Hakim (386-412 AH/ 996-1021 AD), Az-Zahir (412-427 AH/1021-1036 AD) and Al-Mustansir (427-48AH/ 1036-1094AD). He was buried in the Dar al-ilm where he had resided, worked and died.
Al-Muayyad's real name was Hibatullah ibn Musa, born in the town of Shiraz, capital of the Fars Province (then Persia, now in modern-day Iran), in the year 1000 CE. His father, Musa ibn Dawud, served under the Fatimid Caliph-Imam al-Hakim bi Amr Allah as the Chief Missionary of the province of Fars, where the Isma'ili mission was active. Al-Muayyad was "contemporary with the changeover from the Buyid to the Saljuq Sultanate under the Abbasid Caliphate, as well as the Arab bedouin Hilalian invasion of North Africa, the Fatimiid encouraged invasion of Baghdad by al-Basasiri, the Battle of Manzikert in Anatolia, the rise of the Sulayhids of Yaman and the advent of the Armnenian General Badr al-Jamali in Egypt".
During the reign of the Fatimid Caliph-Imam Ali az-Zahir, Hibatullah ibn Musa was permitted to take over the da'wah office from his father. His title, Al-Mu'ayyad fi d-Din "The one aided in religion", was probably accorded to him around this time.
Al-Mu'ayyad was appointed to the Diwan al-insha' (secretariat) in 440 AH/1048 AD on a monthly salary of 1000 dinars and wrote the religious sermons (al-Majalis) for al-Yazuri. (as-Sira, 89-90) Al-Mu'ayyad gives us an interesting information about the presence of a Buyid Prince Abu 'Ali in the Fatimid Court (as-Siras 87).
Al-Muayyad (Hibatullah) gradually worked his way up the hierarchy of the da‘wa and was eventually appointed Chief Missionary under the Caliph-Imam al-Mustansir Billah. In this position, he worked at the Dar al-'Ilm "House of Knowledge" teaching missionaries from both inside and outside the Fatimid Empire and composing his theological works until the end of his life in 1078 CE. He founded the dynamic tradition of "Fatimid daʿwa (religious mission) poetry" that flourished after him for a thousand years through the succeeding Taiyabi daʿwa and continues to thrive today. His poetry uses a unique form of esoteric tāwīl-based religious symbolism--metaphor, in fact, as manifestation, where what appears to be metaphor is the theological reality of the Imam. 
The primary source for details of Al-Mu'ayyad's life are his own memoirs, the Sirat al-Mu'ayyad fi d-Din, which was written in three stages between the years 1051 and 1063 CE. He is also mentioned in the works of Nasir Khusraw, another prominent Isma'ili scholar of the time, who had learned under al-Mu'ayyad. In a poem written in 455/1063 (Diwan, 173-177) Nasir praises al-Mua-yyad as his master (teacher) and refers to him as the "Warden of the Gate" (Bab). There are other direct references in Nasir's Diwan (313-314). Al-Mu'ayyad also taught Hassan-i Sabbah.
- Majalis ul-Muayyadiyah - Written between 450 AH to 470 AH. Comprising eight volumes, each one hundred lectures. It deals with various theological and philosophical questions asked by people of other religions and atheists.
- Diwan ul-Muayyad, a collection of poems in praise of the Ismai'ili Imams and the doctrines of their faith
- Sirat al-Muayyad fid-Din, his autobiography
- Sarah ul-Maad, a treatise on the Day of Resurrection
- Al-Eazah watabeer fi Fazle Yoomal Ghadir, a treatise on the Ghadir Khumm incident
- Al-Ibteda wal-Inteha (lit. the Beginning and the End)
- Taweel ul-Arwah, a treatise on souls
- Mahajul-Ibadah, the method of devotion
- Al-Maselet-wal-Jawab (lit. Questions and Answers)
- Buniyad-i ta’wil - Persian translation of Asas al-ta’wil by Al-Qadi al-Nu'man
- VERENA KLEMM,"MOʾAYYAD FI’L-DIN ŠIRĀZI" in Encyclopaedia Iranica
- 12.0 The Fatimid Da'i Al-Mu'ayyad: His Life, by Dr. Abbas Hamdani, University of Wisconsin, Milwaukee (U.S.A.)
- 12.0 The Fatimid Da'i Al-Mu'ayyad: His Life by: Dr. Abbas Hamdani, University of Wisconsin, Milwaukee (U.S.A.)
- Al-Muʼayyad Al-Shīrāzī and Fatimid Daʻwa Poetry: A Case of Commitment in Classical Arabic Literature; By: Tahera Qutbuddin; Brill, 2005
- Muayyad Fid-Din Ash-Shirazi
- Buniyad-i ta’wil
- Verena Klemm (2003). Memoirs of a Mission: The Ismaili Scholar, Statesman and Poet, al-Mu’ayyad fi’l-Din al-Shirazi. Ismaili Heritage Series 9, London: I. B. Tauris in association with The Institute of Ismaili Studies. ISBN 978-1-86064-432-0.
- Tahera Qutbuddin (2005). Al-mu'ayyad Al-shirazi And Fatimid Da'wa Poetry: A Case Of Commitment In Classical Arabic Literature. Brill Academic Publishers. ISBN 978-90-04-14103-2.
- MOʾAYYAD FI’L-DIN ŠIRĀZI in Encyclopaedia Iranica
- Bab al-Abwab
- The Institute of Ismaili Studies - Memoirs of a Mission: The Ismaili Scholar, Statesman and Poet, al-Mu’ayyad fi’l-Din al-Shirazi
- A Short sketch of the Life of Syedna Al-Muayyad-Fid-Din Al-Shirazi, Head Missionary of the Ismaili Sect
- Al Muayyad fid din al Shirazi Article at Amaana.org
- Life and Lectures of Al Muayyad fid-din al Shirazi Majalis-ul Muayyadiya - by Al Muayyad fid-din Shirazi
- Ismaili Web Poetry Page 1 - Al Muayyad fid-din Shirazi
- Al Muayyad's protege Nasir Khusraw