who sponsored a council of bishops which reaffirmed the nicene creed
Nicene Creed The third Ecumenical Council (Council of Ephesus of 431) reaffirmed the original 325 version[31] of the Nicene Creed and declared that "it is unlawful for any man to bring forward, or to write, or to compose a different (ἑτέραν) faith as a rival to that established by the holy Fathers assembled with the Holy Ghost in Nicaea" (i.e., the 325 creed). The word ἑτέραν is more accurately translated as used by the Council to mean "different", "contradictory", rather than "another".[32][32] This statement has been interpreted as a prohibition against changing this creed or composing others, but not all accept this interpretation.[32] This question is connected with the controversy whether a creed proclaimed by an Ecumenical Council is definitive in excluding not only excisions from its text but also additions to it.
Second Council of Nicaea It met in AD 787 in Nicaea (site of the First Council of Nicaea; present-day İznik in Turkey) to restore the use and veneration of icons (or, holy images),[1] which had been suppressed by imperial edict inside the Byzantine Empire during the reign of Leo III (717–741). His son, Constantine V (741–775), had held the Council of Hieria to make the suppression official.