It is called Grana Padano and not Grana Padana because the Italian word grana is the masculine noun, il grana, describing this specific cheese, and not the feminine noun la grana, which means grain. Grana Padano has protected designation of origin status since 1996.
Discover Card is the fourth largest credit card brand in the U.S., behind Visa, MasterCard and American Express, with nearly 44 million cardholders.
I've never seen Discover accepted anywhere in Europe. Visa and Mastercard are accepted widely, American Express is accepted in heavily touristed areas, and Diner's Club... well it seems to pop up in strange places.