"The vault of the nave has Rome's most famous baroque fresco (1693-1694). The artist, Andrea Pozzo, a Jesuit, was a master of perspective. By using trompe l'oeil architecture, he extends the height of the building and opens it to the heavens. The fresco depicts the Society of Jesus' missionary activity throughout the world; the Savior sends a ray of light into the heart of Ignatius; this, in turn, is transmitted to the then four known continents (Africa, America, Asia, and Europe), where Jesuit missionaries were active." (Joseph N. Tylenda: The Pilgrim's Guide to Rome's Principal Churches, Kansas City 2010).