In the middle of the upper register of the arch, there is a medallion with the haloed portrait of Christ

Grandeco

400*263

Etikedoj

All, Apollinare, Australia, Byzantine, Byzantine mosaics, Classe, Cremorne, in, italy, mosaics, NSW, Page, Page/ZambaGrafix., Point, Ravena, reserved., rights, Sant, St Apollinaris in Classe, Tony