The statue depicts Moses with horns on his head. This is believed to be because of a mistranslation of Exodus 34:29-35 by St Jerome. Moses is actually described as having "rays of the skin of his face", which Jerome in the Vulgate had translated as "horns" (See Halo). The mistake in translation is possible because the wordage can mean either "radiated (light)" or "grew horns".
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