Gorgonzola P.D.O. is an ancient cheese, although as other alimentary products which belong to an old tradition, has not an official birth act. It has a "Lombarda" origin and derives its name from an homonymous town near Milan. Gorgonzola P.D.O. sensorial features are due to different moulds, that create small   grey-green or blue strings. The presence of moulds is defined with the word "erborinatura". Production area: Provinces of Bergamo, Biella, Brescia, Como, Cremona, Cuneo, Lecco, Lodi, Milano, Novara, Pavia, Vercelli.