Badr al-Jamali, appointed Commander of the Armies in 1074, will serve as vizier to his death in 1094, during which time he is the de facto ruler of the Fatimid empire, his authority being over everything except the Caliph himself.

Al-Jam`e Al-Juyushi (Arabic: The Mosque of the Armies), or Juyushi Mosque, us built by Badr al-Jamali, completed in 1085 under the patronage of Caliph and Imam Ma'ad al-Mustansir Billah, and built on an end of the Mokattam Hills, ensuring a view of Cairo city.

As the military vizier has effectively become head of state, the Caliph himself is reduced to the role of a figurehead.