The history of Parmigiano Reggiano goes back more than eight centuries. It is the story of how producers in a small zone in north-central Italy won recognition for the extraordinary quality of their carefully crafted cheese. Parmigiano Reggiano cheese is made with just three ingredients: milk, sea salt and rennet. No additives or preservatives are used, ever, to make Parmigiano Reggiano, considered by many to be “the king of cheeses.”