The Angel of St. Matthew

5th century
Mosaic
Mausoleum of Galla Placidia, Ravenna, Italy

One could think of this image as an angel or as how it is described in Revelation 4:7, "an animal having a face as if of a man." (According to 4:8 all four animals are winged.)

This image in full resolution
View of the entire dome

More of St. Matthew

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