If you wish to film in Italy, you might need to contact the Italian Film Commission local offices in order to obtain permits.
The Italian Film Commission has got a website with all the information you need:
Please go to : www.filminginitaly.com . Click "filming in Italy" and then "Italian film commission network" on the menu. Then click on the region you wish to visit for filming and you will get the details of the local Film Commission you need to contact to obtain permits. There is usually a fee to pay.
The website will also give you other useful information.