Final answer:
The mosaics in the Church of San Vitale in Ravenna, Italy contain various elements, including the richly ornamented cross-ribbed vault in the presbytery and the mosaics of Christ, Saint Vitalis, Bishop Ecclesius, Justinian, and Theodora.
Step-by-step explanation:
The mosaics in the Church of San Vitale in Ravenna, Italy contain various elements. One element is the richly ornamented cross-ribbed vault in the presbytery, which is adorned with mosaic festoons of leaves, fruit, and flowers that converge on a crown encircling the Lamb of God. Another element is the mosaic of Christ between two angels, Saint Vitalis, and Bishop Ecclesius in the apse. Additionally, there are mosaics of the emperor Justinian and his empress Theodora, which flank the apse of the church.