There is a museum in Rome of which I had never heard until today. It’s called the “Case Romane del Celio”, whch means the “Roman houses on the Caelian” hill.
The museum is underneath the basilica of Santi Giovanni e Paolo – St John and St Paul – on the Caelian hill. This was built in 398 over a Roman house that the two saints had lived in. In 1887 there were excavations, and a series of Roman houses were discovered, dating from the 1st-4th centuries AD. There are remarkable frescoes to be seen, such as these. I found the pictures on the Wanted in Rome website:
Access is not from inside the basilica, but from the Clivo di Scauro. This is itself a Roman arched street, not far from the Colosseum. The museum is open every day, I believe, “except Tuesday and Wednesday and can be visited from 10.00-13.00 and 15.00-18.00.” The museum website is here. There’s also a lot of useful information for visitors at this commercial site. Here’s the entrance.
It’s actually really close to the Colosseum and the Circus Maximus, as we can see from Google Maps:
I’ve just used Street View to walk down it, and, as a pedestrian, you can clearly walk straight across into it from the Palatine area, without bothering about that long dog-leg down to the Circus Maximus. So you could start at the Arch of Constantine, walk down the street, and look out for the Clivo di Scauri on the left.
I’ve never been up on the Caelian hill. But I can see that there is quite a bit of interesting stuff up there. The next time that I am in Rome, I shall go and have a look!