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.
Islam in Algeria
Islam took longer to spread to the far south of Algeria, whose history is to a large extent separate: only in the 15th century were the Tuareg finally converted to Islam.