RiZ III said:The image of jesus probably originates even after the 4th century. St.Augustine(4th century) said that no one knows what jesus looked like. To paraphrase, he says, some say he looked very ugly and others say he was very good looking. Either way its clear there was no canonical image of Jesus at the time.
.. at least not in the Western half of the Church!
(Okay, the Eastern half didn't have a canonical one, but they did have a tradition in place. Now I wish I had that icon...grrrr.)