You could look for a list of liberty, rationalist and modernist buildings on Wikipedia or elsewhere and start from that. Tipically the "casa del fascio" buildi

You could look for a list of liberty, rationalist and modernist buildings on Wikipedia or elsewhere and start from that. Tipically the "casa del fascio" buildings are all interesting and present in most major cities. The most famous one is the one in Como, but I like the one in Trento as well, for example. Train stations (e.g. Milano Centrale), central post offices are also often from these periods.