Chiesa del Gesù (Church of Jesus), Rome, Italy

Located just a few steps from the Piazza Argentina (very easy to find) this church called Chiesa del Santissimo Nome di Gesù (in English, Church of the Holy Name of Jesus) is the main Jesuit church in Rome.
Built in 1568 you'll find on it's ceilings some magnificent paintings with a very peculiar 3D effect, in fact, I don't remember to see anything like it in any other church elsewhere.
I've decided to make this reference to this place because it's not marked on the "tourist map" but I think it should - it was by mere chance that we've visited it, we were walking down the street and came across a nun who told us to go see it...