Keywords: Byzantine emissaries to the Caliph.jpg tourmarches Basil sent as ambassador apokrisiarios to the Caliph Amermoumnes Al-Mu'tasim in 838 Chronicle of John Skylitzes cod Vitr 26-2 fol 60 Unknown 12th/13th century author 12th/13th century PD-old-100 Madrid Skylitzes Embassies Al-Mu'tasim Byzantine “Arab Wars |