The Lintel Above the Transfiguration Mosaic at Sant'Apollinare in Classe: Detail, Christ in Majesty

Christ holds the fingers of his right hand in the Latin blessing configuration while the left hand holds a gospel book.

This image in full resolution
View the whole lintel
View the entire Transfiguration Mosaic
More of Christ in Majesty

Photographed at the site by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.