Yeah, I thought he was easily recognizable because he's holding stone tablets.

But apparently it is a thing: https://en.wikipedia.org/wiki/Horns_of_Moses

> The Horns of Moses are an iconographic convention common in Latin Christianity whereby Moses was presented as having two horns on his head, later replaced by rays of light.[1] The idea comes from a translation, or mistranslation, of a Hebrew term in Jerome's Latin Vulgate Bible, and many later vernacular translations dependent on that. Moses is said to be "horned", or radiant, or glorified, after he sees God who presents him with the tablets of the law in the Book of Exodus.