What are the characteristics of the mosaics in the Church of San Vitali in the city of Ravenna, Italy?

The mosaics are finished with a final polish, and when illuminated, they are so brilliant that even in the dim light of a candle they sparkle from time to time. Ravenna, Italy, the city of St. Vitale church preserves the world's best Byzantine mosaics, church center hall walls decorated with a large mosaic is the emperor Justinian I and the empress Theodora and courtiers and courtesans portraits, so far in the light of the illumination, is still colorful and colorful.

The 6th century Byzantine mosaic of Theodora and her ladies-in-waiting, now in the Church of St. Vitalien, Italy.