Moses has been depicted with horns because of a translation blooper.
In Genesis, the word 'karan' (Hebrew for rays of light) was used to describe
Moses descending from Sinai. In the Latin version, The Vulgate, St.Jerome
mistook the word for 'karen' which meant horns. Not only does this perception
still exist in the minds of many, but it is fueled by thousands of works of
art showing poor Moses sprouting horns instead of light rays.
I have known Jewish people who have been asked by Gentiles to see their horns!
Jews do not have horns on their heads so don't ask!
Stephen