Gratian and Irnerius, two of the formative influences on legal study both taught at the university in the 12th century (and Copernicus was also there to study in 1495).
The city was one of the first European settlements to experiment with the concept of "free" public transport.
Bologna is also a lunch meat. It is made from the spare parts of pigs, such as their ears, snouts and tails. Oscar Mayer popularized bologna with their own brand, which ran the famous commercials in which the kid sings, "My bologna has a first name . . ."