The Ethiopian Orthodox Tewahedo Church is the largest of the Oriental Orthodox Churches. One of the few Christian churches in sub-Saharan Africa originating before European colonization of the continent, the Ethiopian Orthodox Tewahedo Church dates back to the acceptance of Christianity by the Kingdom of Aksum in 330, and has between 36 million and 51 million adherents in Ethiopia. It is a founding member of the World Council of Churches. The Ethiopian Orthodox Tewahedo Church is in communion with the other Oriental Orthodox churches.