Learned that back in 1979, first time in Rome and didn't speak any Italian (although I had a fight with a guard at the necropoli in Tarquinia who said, while visiting a tomb, -yes, these were the days...- that Greeks had painted all the sex-related stuff) and I visited San Paolo fuori le mura. By the way, when not knowing what to do in Rome, one should visit it: one of the most impressive churches in Italy!

PS Very complicated sentence. I should write it again in Italian