I want to know the answer to the following question:
The shrine of San Vittore in ciel d'oro had mosaics from which century?
All the background I'm provided with is that "The surviving apse mosaic of the Basilica of Sant'Ambrogio, which shows Christ enthroned between Saint Gervasius and Saint Protasius and angels before a golden background date back to the 5th and to the 8th century, although it was restored many times later.". Is that enough to answer the question?