Parmigiano-Reggiano

Parmigiano Reggiano is an Italian hard, granular cheese produced from cow's milk and aged at least 12 months or, outside the European Union and Lisbon Agreement countries, a locally produced imitation. It is named after two of the areas which produce it, the Italian provinces of Parma and Reggio Emilia ; it is also produced in the part of Bologna west of the River Reno and in Modena (all of the above being located in the Emilia-Romagna region), as well as in the part of Mantua (Lombardy) on the south bank of the River Po.

Source: Wikipedia