 Complete the following phrase:  From the time of Procopius in the reign of Justinian, the equestrian imperial statue on the Column of Justinian in the Augustaion beside Hagia Sophia, which gestured towards Asia with right hand, was understood to represent the emperor holding back the threat to the Romans from the Sasanian Empire in the RomanPersian Wars, while the orb or globus cruciger held in the statues left was an expression of the global power of the Roman emperor. Subsequently, in the 