Travel tips/insights to southern Italy (Sicily, Naples, Rome)

I think in Rome we had to present passports at the Vatican Museum, the Forrum, and the Coliseum. Didn’t use them anywhere in Spain.

Yes, I do indeed recall now that we needed passports for the Vatican . . . (also, it’s another country).

I did also show ID at the Coliseum but I think we showed a drivers license (we had a certified tour guide with us and she did the talking, not sure what the rules are).