Getting tourist board information right before and even during your vacation in Italy, can really help you benefit from the most up-to-date details about the region you are visiting. Perhaps there is a festival occurring that is new on the calendar that a tourist board can help you with.
The tourist board for the country of Italy has a great website offering a plethora of information for your plans. If you live in North America they will also send you a free brochure. If you are not in North America, visit the website specified for the UK.
For the Lombardy region there is yet another online tourist board that can help you especially if you are focusing your Italian stay in this region. Bergamo itself has its own board that you can visit at Via Vittorio Emanuele 20 or call 011-39-035-213-185.
If you have further questions and needs for travel within Italy, it is always good to check with your own government or the host country's embassy. Americans can get into Italy without a Visa and stay for up to three months. For more entry-requirements, check with the government.