Linked from
The 9 pages that link to Parmigiano-Reggiano, each with the reason it gives.
Emilia-RomagnaBroader topic: Its production zone includes several provinces of Emilia-Romagna.
ParmaBroader topic: Its production area includes Parma and anchors the region’s culinary reputation.
PestoBroader topic: This aged cheese is one traditional source of pesto’s saltiness and umami.
ParmesanBroader topic: It is the best-known protected variety associated with Parmesan.