10. Ethiopia
Total Christian Population: 52 580 000
In the mid-4th century, Christianity started in Ethiopia. Jon Abbink, in his paper A Bibliography on Christianity in Ethiopia, indicated that the Ethiopian Orthodox Christianity became dominant because of its influence on the imperial rulers. But it indeed played a significant role in the formation of Ethiopian highlands. One important event in the history of Christianity in Ethiopia was the impact of Roman Catholicism brought by the Portuguese in the 16th century.
