Il Biscione Black and white
 
The emblem of the Visconti is the symbol of Milan

The Biscione ('large grass snake'), also known as the Vipera ('viper' or in Milanese as the Bissa), is a heraldic charge showing a blue serpent in the act of swallowing a human – usually a child, and sometimes described as a Moor.
 
Frame not included.