sentences:  Between 1395 and 1447, the Duchy of Milan used the arms of the ruling House of Visconti, the "biscione", a great serpent shown devouring a Saracen.This standard greatly replaced the Cross of Saint Ambrose in Milan.In 1397 the Duke of Milan, Gian Galeazzo Visconti, was granted the usage of the imperial eagle by Emperor Wenceslaw.