Chiesa di Santa Maria in Transpontina

The church of Santo Spirito in Sassia was founded in the 8th century. Seriously damaged during the sack of Rome (1527), the church was rebuilt between 1538 and 1545, but the façade dates back to 1590, while the decoration of the apse was carried out from 1593 by Jacopo Zucchi. A new high altar was inaugurated in 1668 by Francesco Maria Febei.

The church of San Lorenzo in Piscibus was probably founded as early as the 6th century, but the first verifiable mention of the church dates back to the end of the 12th century. In 1663, the entire complex was entrusted to the Piarists who, in 1672, had the church radically restored in Baroque style under the direction of Francesco Massari. In 1731 the convent was demolished and rebuilt in 1773 according to the design of Giovanni Domenico Navone, who also designed a new façade for the church. When the Via della Conciliazione was built, the church was not demolished (only the baroque façade and the atrium were demolished) and was integrated into the modern buildings on the left side of Piazza Pio XII.

The church of Saints Celsus and Julian was founded in the 9th century and was made a papal chapel during the pontificate of Innocent III (1198-1216). The original church was demolished and rebuilt at the request of Pope Julius II (1503-1513), who asked Donato Bramante for a new project (1509). This project was not carried out due to lack of funds; two centuries later, Pope Clement XII (1730-1740) decided to have the church rebuilt according to the project of Carlo de Dominicis, completed in 1735.