Sant'Ignazio, Rome in the context of "Oratory of St Philip Neri"

The Church of the Gesù (Italian: Chiesa del Gesù, pronounced [ˈkjɛːza del dʒeˈzu]), officially named Chiesa del Santissimo Nome di Gesù (English: Church of the Most Holy Name of Jesus), is a church located at Piazza del Gesù in the Pigna rione of Rome, Italy. It is the mother church of the Society of Jesus (best known as Jesuits). With its façade, described as "the first truly baroque façade", the church served as a model for innumerable Jesuit churches all over the world, especially in Central Europe and in Portuguese colonies. Its paintings in the nave, crossing, and side chapels became models for art in Jesuit churches throughout Italy and Europe, as well as those of other orders. The Church of the Gesù is one of the great 17th-century preaching churches built by Counter-Reformation orders like the Jesuits in the Centro Storico of Rome – the others being Sant'Ignazio, also of the Jesuits, San Carlo ai Catinari of the Barnabites, Sant'Andrea della Valle of the Theatines, and the Chiesa Nuova of the Oratorians.

First conceived in 1551 by Saint Ignatius of Loyola, the Spanish founder of the Society of Jesus active during the Protestant Reformation and the subsequent Catholic Counter-Reformation, the Gesù was also the home of the Superior General of the Society of Jesus until the wide suppression of the order in 1773. The church having been subsequently regained by the Jesuits, the adjacent palazzo is now a residence for Jesuit scholars from around the world studying at the Gregorian University in preparation for ordination to the priesthood.

Illusionistic ceiling painting, which includes the techniques of perspective di sotto in sù and quadratura, is the tradition in Renaissance, Baroque and Rococo art in which trompe-l'œil, perspective tools such as foreshortening, and other spatial effects are used to create the illusion of three-dimensional space on an otherwise two-dimensional or mostly flat ceiling surface above the viewer. It is frequently used to create the illusion of an open sky, such as with the oculus in Andrea Mantegna's Camera degli Sposi, or the illusion of an architectural space such as the cupola, one of Andrea Pozzo's frescoes in Sant'Ignazio, Rome. Illusionistic ceiling painting belongs to the general class of illusionism in art, designed to create accurate representations of reality.

Sant'Andrea della Valle is a titular church and minor basilica in the rione of Sant'Eustachio of the city of Rome, Italy. The basilica is the seat of the general curia of the Theatines and is located on the Piazza Vidoni, at the intersection of Corso Vittorio Emanuele (facing facade) and Corso Rinascimento. It is one of the great 17th century preaching churches built by Counter-Reformation orders in the Centro Storico (the others being San Carlo ai Catinari of the Barnabites, The Gesù and Sant'Ignazio of the Jesuits, and the Chiesa Nuova of the Oratorians).

San Carlo ai Catinari, also called Santi Biagio e Carlo ai Catinari ("Saints Blaise and Charles at the Bowl-Makers"), is an early-Baroque style church in Rome, Italy. It is located on Piazza Benedetto Cairoli, 117 just off the corner of Via Arenula and Via dei Falegnami, a few blocks south of the church of Sant'Andrea della Valle.

The attribute ai Catinari refers to the presence, at the time of its construction, of the many makers of wooden basins (Italian catini) who worked in the area. The church was commissioned by the Order of the Barnabites and funded by the Milanese community in Rome to honour their fellow Milanese St. Charles Borromeo (Italian: San Carlo). It is one of at least three Roman churches dedicated to him (including San Carlo al Corso and San Carlo alle Quattro Fontane) and one of a number of great 17th century preaching churches built by Counter-Reformation orders in the Centro Storico (the others being The Gesù and Sant'Ignazio of the Jesuits, Sant'Andrea della Valle of the Theatines, and the Chiesa Nuova of the Oratorians).

Santa Maria in Vallicella, also called Chiesa Nuova, is a church in Rome, Italy, which today faces onto the main thoroughfare of the Corso Vittorio Emanuele and the corner of Via della Chiesa Nuova. It is the principal church of the Oratorians, a religious congregation of secular priests, founded by St Philip Neri in 1561 at a time in the 16th century when the Counter Reformation saw the emergence of a number of new religious institutes such as the Jesuits, the Theatines, and the Barnabites. These new congregations were responsible for several great preaching churches built in the Centro Storico, the others being Sant'Andrea della Valle (Theatines), San Carlo ai Catinari (Barnabites), and The Gesù and Sant'Ignazio (Jesuits).