 The Abbasid period was marked by new taxations, and the Copts revolted again in the fourth year of Abbasid rule.At the beginning of the 9th century the practice of ruling Egypt through a governor was resumed under Abdallah ibn Tahir, who decided to reside at Baghdad, sending a deputy to Egypt to govern for him.In 828 another Egyptian revolt broke out, and in 831 the Copts joined with native Muslims against the government.