Thanks for the info Cornelistromp, Jim McDougall, and Fernando. I'm glad you like the sword.
I'll take a look at Fedrico Visconti today. I have been reading about The Visconti Castle / St. Vitus.
http://www.castelloviscontidisanvito.it/cvisconti.html
The Visconti rule in Milan seems to have ended with the death of Filippo Maria Visconti in 1447. He was the last direct male descendant of Ottone Visconti (?).
The heraldic motif of the biscione is in wide use today. For example, the city of Milan, the Alfa Romeo Logo, and even the Inter Milan Football Club. There is a lively debate on whether the snake is swallowing or giving birth, and whether a man or a child is depicted. The origin of the biscione has been attributed to the arms of a Saracen warrior. This warrior was supposedly killed by Ottone Visconti during the crusades, Ottone then adopted the the symbol. Another version has Ottone killing an enormous snake that liked to eat children. The snake is said to have lived in lake Gerundo near Milan. Nothing survives of Lake Gerundo today.
Fernando, It looks like you are a moderator, can you help me get out of "new user purgatory" so that I can send private messages?