Biscione
The biscione (English: "big grass snake"), less commonly known also as the vipera, is in heraldry a charge consisting of a divine serpent with a child in its mouth; the serpent may be variously described as being in the act of swallowing the child, or the child may be emerging from its mouth. It is a historic symbol of the city of Milan, originally on the coat-of-arms of the Visconti and Sforza dynasties.