Church of St. Paul Within the Walls

The construction of the Basilica of Santa Maria degli Angeli e dei Martiri was entrusted by Pius IV (1560-1565) to Michelangelo, who was also working in St. Peter's Basilica at the time. The work continued after the death of Michelangelo by Giacomo Del Duca. The work continued until the middle of the 18th century when the side entrances to the transept were closed by the Chapels of San Bruno and Niccolò Albergati. With the unification of Italy, the Carthusian fathers were expelled from the church and its convent; the convent area was first left to the military, then to the friars of St. Francis of Paola and finally to the diocesan clergy. With the marriage of Vittorio Emanuele III, this basilica became a state church, a rank that it still retains today.

The Church of San Carlo alle Quattro Fontane is a baroque church built between 1634 and 1644 by Francesco Borromini. The facade of the church on the street was designed and built much later, from 1664; after the architect's death in 1667, the work was continued from 1670 to 1680 on the basis of Borromini's drawings.

The basilica of Santa Pudenziana dates from the 5th century, but the present basilica is largely the result of a 16th century restoration. The bell tower was added in the 13th century and a room in the left aisle was closed for construction. The restoration work completed in 1588 changed the structure of the church by demolishing the portico, removing the medieval choir and building a few pillars to reinforce the columns. Today it is the national church of the Philippines and the seat of the homonymous cardinal title.