This monophysite (one nature) teaching was an important factor contributing to the breaking away of certain churches from the rest of Eastern Orthodoxy. Coupled with the decline of Byzantine power in the outlying areas of the Eastern Empire, monophysite (more precisely, non-Chalcedonian) doctrine led to the Coptic Church, the largest Christian body in Egypt today, the Ethiopian Orthodox Church, the largest in Ethiopia, and the Jacobite Church of Syria, which has most of its adherents in South India.