The wellhead is obtained from a Roman honorary base datable between the 1st and 2nd centuries, reused in the early Middle Ages when a circular hole was opened and one side was carved with two facing and rampant griffins on a pillar with phytomorphic decorations. The scene is dominated by a horizontal band, severely damaged, in which a tree with two birds can be read in the center and two quadrupeds facing outwards on the sides that seem to hold a leaf in their mouth. On the opposite side the Roman inscription remains, while on the contiguous ones the coeval decoration consisting of a flower with a central button and an amphora has been preserved. It comes from Altino.