Parmigiano Reggiano is a cheese from the Parma and/or Reggio Emilia region of Italy. A similar cheese from a neighbouring region is Grana Padano. Both cheeses are DOP controlled: they have specific methods for processing. They are both cooked, pressed, semi-hard cheeses made from cow's milk. Both use high quality milk, rennet and salt; while aging, the wheels are humidity and temperature controlled, cleaned and flipped regularly.