I had a little bit of business at the Vicariate (located in the Lateran Palace) yesterday afternoon and whilst there snapped a shot of the frescoed ceiling.
There's an exposition of quite a large number (over 100, I would say) of Marc Chagall's paintings at the museum which forms part of the Vittorio Emmanuele Monument which is well worth a look.
Unsurprisingly, as a Jewish artist he painted some wonderful depictions of scenes from the Old Testament. The above shows the Children of Israel eating the 1st passover meal.
And this is a very charming depiction of Abraham being visited by the three angels. Note the scene of the sacrifice of Isaac in the top right-hand corner.
And this is a painting of a synagogue from the early 1930s. You can click on any of these pictures to enlarge them. I think I've spotted a significant detail in the synagogue scene - can anyone else spot it?