1176195 Turkey / Iraq: The embassy of John the Grammarian in 829, between the Abbasid Caliph Al-Ma\'mun (left) and the Byzantine emperor Theophilos (right), from the Madrid Skylitzes (12th-13th century); (add.info.: John VII Grammatikos or Grammaticus, i.e., \'the Grammarian\', Ecumenical Patriarch of Constantinople from January 21, 837 to March 4, 843, died before 867.); Pictures from History; it is possible that some works by this artist may be protected by third party rights in some territories.