Το the right of the emperor his brothers, Heraclius and Tiberius, are depicted, and next to them his son and later emperor, Justinian II, is holding a sapellum in his hands.
Thank you User10 and Lilian!
You are my Masters!
And may I ask a further question?
Cultural differences are very obvious, because I don't understand why did Justinianus II hold such a thing. Can I guess it was a symbol of succession or power? Or did it mean the temple was celebrated for him? Or he was the real owner of the ST. Ravenna temple? Then, what is the use or purpose of the small chapel?