In the 11th century, the Fatimids sent the Banu Hilal to the Tripolitania, Tunisia and Constantine areas against the Zirids.

[3] Djelfa is located at an elevation of 3,734 feet (1,138 m) in the Ouled Naïl Range of north-central Algeria, between the towns of Bousaada and Laghouat.

It is situated in a transitional zone between the dry, steppe-like Hautes Plaines (high plateaus) of the north, characterized by chotts (intermittent salt lakes), and the Sahara to the south.

[citation needed] The surrounding region for centuries has been the meeting place of the Ouled Naïl people, who live in black-and-red striped tents and claim descent from the Islamic prophet, Muhammad.

[2] It has had the following incumbents, mostly of the fitting episcopal (lowest) rank with an archiepiscopal (intermediary) exception: The inhabitants belong to the Ouled Naïl, also living in Biskra, M'Sila, Ghardaia and in Saharan Atlas.