Christianization of Albania
The Christianization of Albania (Albanian: Krishtërizimi e Shqiperisë) was a process where the people who inhabited early Albania during late antiquity and the early middle ages converted to Christianity. Before this process of mass-conversion, a majority of the people in the lands of modern-day Albania either followed old Illyrian religion or practiced ancient Greek religion.
Source: Wikipedia — Christianization of Albania (CC BY-SA 4.0)