The embassy of John the Grammarian in 829, between the Byzantine emperor Theophilos (right) and the Abbasid caliph Al-Ma’mun, from the Madrid Skylitzes, fol. 47r, detail.

January 18, 2011 By

The embassy of John the Grammarian in 829, between the Byzantine emperor Theophilos (right) and the Abbasid caliph Al-Ma'mun, from the Madrid Skylitzes, fol. 47r, detail.

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