It would never have been possible for Byzantine court art to become the Christian art par excellence, if the Church itself had not become an absolute authority and had not felt itself to be mistress of the world. In other words, the Byzantine style was only able to gain a footing everywhere where there was a Christian art, because the Catholic Church in the West desired to become the power the Emperor was already in Byzantium.

The Social History of Art, Volume I. From Prehistoric Times to the Middle Ages, 1999 - Chapter IV. The Middle Ages