Christ in Majesty
4th or 5th/6th century
Euphrasian Basilica, Poreė, Croatia
I have given this title to the fresco although the halo on the central figure does not have the cross that usually distinguishes Jesus Christ. It is the overall composition that suggests this designation: a central character raised higher than the others, and the attitude of prayer visible in the figure on the right. Young and beardless, that figure is most likely St. John the Evangelist.
This image in full resolution
More of Christ in Majesty
Photographed at the basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.