The Bagdad caliphs, called Abbassidesclaiming descent from Abbas, the uncle of Mahometremained rulers of Egypt until 1517, or until within twenty years of the death of the last Abbasside.)

The name of the Abbasside caliph was at once expunged from the Friday prayers at the old mosque of Amr at Fustat; the black Abbasside robes were proscribed, and the preacher, in pure white, recited the Khutba for the imam Moizz, emir el-muminin, and invoked blessings on his ancestors Ali and Fatima and all their holy family.

The name of the Abbasside caliph was at once expunged from the Friday prayers at the old mosque of Amr at Fustat; the black Abbasside robes were proscribed, and the preacher, in pure white, recited the Khutba for the imam Moizz, emir el-muminin, and invoked blessings on his ancestors Ali and Fatima and all their holy family.

The holy cities of Mecca and Medina in the Higaz, where the gold of Moizz had been prudently distributed some years before, responded to his generosity and success by proclaiming his supremacy in the mosques; the Hamdanide prince who held Northern Syria paid similar homage to the Fatimite Caliph at Aleppo, where the Abbassides had hitherto been recognized.

He tried to enlist the support of the Abbasside Caliph, but El-Muti replied that Fatimis and Karmatis were all one to him, and he would have nothing to do with either.

Only two biographies can be said to be in the nature of sources, that of Muhammad ibn Hischam, written on the model of an earlier biography, undertaken about 760 for the Abbasside Caliph Mansur, and of Wakidi, written about 820, which is important as containing the text of many treaties made by Mahomet with various tribes.

ALMANSOR ("the invincible"), a title assumed by several Mussulman princes, as by the second caliph of the Abbasside dynasty, named Abou Giafar Abdallah (the invincible, or al mansor).

The abbassides always sat in person in this court to aid in the redress of wrongs.