DonatismSchismatic movement among Christians of N Africa (fl. 4th cent.), led by Donatus, bishop of Casae Nigrae (fl. 313), and the theologian Donatus the Great or Donatus Magnus (d. 355). The schism arose when certain Christians protested the election of the bishop of Carthage, charging that his consecration by Felix, bishop of Aptunga, was invalid because Felix was considered a traitor.