The church is dedicated to the Virgin Mary, to St. Denis the Areopagite and St. Louis IX, king of France. The church was designed by Giacomo della Porta and built by Domenico Fontana between 1518 and 1589, and completed through the personal intervention of Catherine de' Medici, who donated to it some property in the area. It is the national church in Rome of France.

Sant'Agostino is a Roman Catholic church in the piazza of the same name near Piazza Navona, in the rione Sant'Eustachio, of Rome, Italy. It is one of the first Roman churches built during the Renaissance. Adjacent to the church is the Biblioteca Angelica, a library founded in 1605.

The tour concludes at Santa Maria del Popolo, where Caravaggio’s dramatic vision reaches one of its most powerful expressions. Inside the Cerasi Chapel, you encounter The Conversion of Saint Paul and The Crucifixion of Saint Peter, two masterpieces that mark a decisive moment in the artist’s career. Here, Caravaggio abandons idealization in favor of raw realism, intense light, and deeply human emotion. Your guide helps you read these works in detail, explaining their symbolism, innovative use of chiaroscuro, and the profound spiritual tension that makes this final stop a compelling conclusion to the journey through Caravaggio’s Rome.