Little else is known of church history down to the period of Jesuit influence, which broke the connection with Egypt. Union with the [[Church of Alexandria (Coptic
))|Coptic Church]] continued after the Arab conquest in Egypt.
Abu Saleh records in the 12th century that the patriarch always sent letters twice a year to the kings of Abyssinia (Ethiopia) and Nubia, until Al Hakim stopped the practice. Cyril, 67th patriarch, sent Severus as bishop, with orders to put down [[polygamy]] and to enforce observance of canonical consecration for all churches. These examples show the close relations of the two [[church]]es concurrent with the Middle Ages. But early in the 16th century the church was brought under the influence of a Portuguese mission.