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.
Demographics of Algeria
There were an estimated 10,000 Christians in Algeria in 2008. In a 2009 study the UNO estimated there were 45,000 Catholics and 50,000–100,000 Protestants in Algeria. A 2015 study estimates 380,000 Muslims converted to Christianity in Algeria.