Imam Zahir became the Imam of the Time and the seventh Fatimid Caliph at the young age of 16 years. This period marks the life and times of the famous Ismaili physician and philosopher Avicenna.

Imam Zahir was born on the 10th of Ramazan, 395AH (1005AD) in Cairo.

Mowlana Imam Hakem bi Amrillah ascended the Throne of Imamate at the young age of eleven years. Many forces in the pursuit of power actively sought to undermine the security of the Fatimid Empire during his reign, including the Abbasid Caliph of Baghdad, Qadir Billah. The Imam left his palace, never to be seen again, on the 27th of Shawwal, 411AH (1021AD) - an event that would cause a few to split from the main branch of Ismailis in their belief that the Imam had ascended to heaven and would not return for a thousand years. This sect would come to be known as the Druzes.

Mowlana Imam Hakem bi Amrillah was born on the 3rd of Rabi-el-Awwal, 375AH (986AD), in Cairo.