Basilica di Sant'Apollinare

The Basilica of Saints Tryphon and Augustine dates back to the 14th century, when the Augustinians, who were already officiating in the church of San Trifone in Posterula, decided to build a new structure for their convent and dedicate it to Saint Augustine. The church was built between the end of the 14th century and the beginning of the 15th century and completed around 1420. Too small and built too close to the Tiber, the church was rebuilt between 1479 and 1483. The façade, inspired by the church of Santa Maria Novella in Florence, has been attributed by some to Leon Battista Alberti and was built in 1483 by Jacopo da Pietrasanta.

The church of Santa Maria dell'Anima, founded in the 14th century, was the church of the Holy Roman Empire in Rome and is today the national church of the German-speaking world. The oldest mention of the church dates back to 1389. In the 15th century, Santa Maria dell'Anima became a hospital for all inhabitants of the Holy Roman Empire who visited Rome. A lay brotherhood was also active, of which prominent citizens of the Holy Roman Empire residing in Rome became members, including William of Orange's eldest son, Philip William. Today, after bitter disputes, both the Belgians and the Dutch have a representative on the board. The church itself is now used exclusively as a parish for the German-speaking people of Rome. Since 1992, the Dutch have had the so-called Frisian Church (San Michaele dei Frisoni) at their disposal, in the immediate vicinity of St. Peter's Basilica.

The church of San Luigi dei Francesi was built between 1518 and 1589 by the French community of Rome. The work was carried out by Domenico Fontana on a project by Giacomo Della Porta, and thanks to the donations of Catherine de' Medici (1519-1589). Between 1749 and 1764 the interior was renovated under the project of the French architect Antoine Dérizet.