Algeria–Holy See relations
Although Islam is the state religion of Algeria, the Holy See has maintained a comparatively good relationship with the Algerian authorities, with Léon-Étienne Duval being famously recognized as the "bishop of Muslims" after the departure of French colonists.
History of Algeria
The Almoravid ("those who have made a religious retreat") movement developed early in the 11th century among the Sanhaja Berbers of southern Morocco. The movement's initial impetus was religious, an attempt by a tribal leader to impose moral discipline and strict adherence to Islamic principles on followers. But the Almoravid movement shifted to engaging in military conquest after 1054. By 1106, the Almoravids had conquered the Maghreb as far east as Algiers and Morocco, and Spain up to the Ebro River.