The Pantheon Group
The Pantheon Group (pictured above in the best shot I've ever taken of the dome!) talked both about the incredible building we can see AND about its original setting. Rather than the small, sloping piazza now preceding the Pantheon there would have been a large portico extending toward the sundial. In fact, the Mausoleum of Augustus and the top of the obelisk would have been visible from the Pantheon's portico.
There is no picture of the Baths of Diocletian Group, but I include as an excuse a picture of the hail that was falling while they were talking. We all got a little dispirited and the whole group dissolved before the presenters came to a well-rounded conclusion and posed for their picture. Alas. On the other hand, all my students probabaly know how to say "It's snowing" in Italian, which is not something that every American studying in Rome has reason to use.