If you have just arrived in Bologna or would like to get to know more about the place, it is helpful to drop by Bologna Welcome located at Piazza Maggiore. You could get a lot of free information, maps, and newspapers in English. The events in the city are also distributed thru pamphlets. They also offer a card which will enable you to get a free access to a number of museums in two days.
The Tourist Center of Bologna or Bologna Welcome is located at Piazza Maggiore 1e, Bologna. It is open Monday to Saturday from 9am to 7pm, and on Sundays from 10am to 5pm.
To know more you can visit the official website here.