Questions: What is the title of this work of art?

The title of the work of art in question is "Christ as Sol Invictus from the Mausoleum of the Julii."

Explanation: The text provided lists various tutorials and specific works of art from Unit 3, focusing on Early Christian and Byzantine Art. The specific work of art mentioned in the question is found under tutorial 3.1.3, titled "Images of Christ." The work of art is "Christ as Sol Invictus from the Mausoleum of the Julii."

To provide further context:

• "Christ as Sol Invictus" is an early Christian mosaic that depicts Christ in the guise of Sol Invictus, the Roman sun god, symbolizing the triumph of Christianity over paganism.
• The Mausoleum of the Julii is located in the Vatican Necropolis, beneath St. Peter's Basilica in Vatican City.

This work is significant as it illustrates the early Christian adaptation of Roman iconography to convey Christian themes.