|Fatimid Gold coin minted in Misr and dated 416/1025-1026
[two line center gives the name : Al-Zahir li-l'zaz Din Allah Amir al.Mu'minin]
He was born on 20th Ramdan, 395/June 4, 1005. His name was Ali Abul Hasan, or Abu Ma'd, surnamed az-Zahir la-azaz dinallah (Assister in exalting the religion of God). His mother Amina was the daughter of Abdullah, the son of Imam al-Muizz. He acceded on the throne of Fatimid Caliphate and Imamate on 411/1021 at the age of 16 years. On the occasion of his coronation, a special payment in excess (fadl) of 20 dinars was granted to each soldier.
A black eunuch Midad began his career in the service of Sit al-Mulk, the aunt of az-Zahir. She employed him as a teacher of az-Zahir. On Friday, the 18th Safar, 415/May 1, 1024, az-Zahir invested Midad the honorific title and named him Abul Fawaris. Later on, Midad was assigned the administration of the affairs of the soldiers according to a long edict read publicly in the palace.