Parmesan

Parmesan is an Italian hard, granular cheese produced from cow's milk and aged at least 12 months or, outside the European Union, a locally produced imitation. Parmigiano Reggiano is named after two of the areas which produce it, the Italian provinces of Parma and Reggio Emilia (Parmigiano is the Italian adjective for the city and province of Parma and Reggiano is the adjective for the province of 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