Why did Michelangelo sculpt Moses with horns?

Why did Michelangelo sculpt Moses with horns?

Nov 12

Pope Julius II, famous to modern TV viewers as the Cardinal della Rovere on the popular miniseries The Borgias on Showtime or as the frustrated Pope in the 1965 movie The Agony and The Ecstasy (played by Rex Harrison) who constantly questions of Michelangelo when will he make an end of the painting of the Sistine Chapel, commissioned the sculpting of Moses to adorn his tomb.  Today this statue...