I was in Rome last year and noticed that the police at the airport had what appeared to be VHF low-band radios. I think that the fire department is also VHF lo. Not sure about other police agencies. Unfortunately, I did not take my scanner on that trip.
I confirm that Fire dep are in low VHF (73-74Mhz) as well as National Police (76-79 Mhz) .
The other National Police Force "Carabinieri" is UHF (425) while Local Police can be in high VHF (156-174) or UHF (460-470). A TETRA National Interforce network is under deployment and active in really few areas
Due to the fact that is proibithed listen the emergency services, isn't easy find freq info.
As far as I know ther is only one good forum but is only in italian and you need to register also to read the post. If you are interested I can post the link.
But if you already know the places that you will visit, maybe I can help ...