The Apse Mosaic at Santa Pudentiana
Apse, Basilica of St. Pudentiana, Rome
Female figures place crowns on the heads of St. Paul (on the left) and St. Peter (on the right). The figures are often taken to be St. Pudentiana and St. Praxedes, but historians consider it more likely that they represent the Gentiles and the Jews respectively.
The codex in Christ's left hand reads Dominus conservator ecclesiae Pudentianae, which can mean either "God is the preserver of Pudentiana's church" or "God is the preserver of the Pudentian [i.e. of St. Pudens] church."
The lower right corner of the mosaic is a restoration from 1588; otherwise, this is the oldest church mosaic in existence. It is also one of the earliest images in which Christ is represented as a human figure rather than a symbol. (Directly above this naturalistic image, he is represented symbolically by the Cross.) It also includes one of the oldest examples of the use of the angel, ox, lion, and eagle to represent the evangelists:
More of early representations of Christ
More of St. Paul
More of St. Peter
More of the Evangelists
Photographed at the basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.