Since the schism occurring as a result of the political and Christological controversies at the Council of Chalcedon (451), the portion of the Church of Alexandria loyal to Chalcedonian Christology has liturgically been Greek-speaking, the majority of its native (i.e., Coptic) population and their modern descendants becoming a part of the Coptic Orthodox Church of Alexandria (i.e., non-Chalcedonian). After the Arab conquest of North Africa in the 7th century the Eastern Orthodox were a minority even among Christians, and remained small for centuries.