The fountain in the shape of a triumphal arch with three openings. Four columns of colored marble placed on high stylobates mark the openings of three niches: in the middle there is the colossal statue of Moses. In the side niches are the high reliefs illustrating biblical episodes related to Aaron (left) and Gideon (right). At the base of the niches water flows from a fake cliff in onion marble in the baths adorned with four lions.