Church of Santo Spirito in Sassia

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 Santa Maria in Traspontina was built in the 16th century. The architect of the building was the Bolognese Ottaviano Mascherino, who also built the first nucleus of the Quirinal Palace and the church of San Salvatore in Lauro. Inside, the church has a Latin cross plan: a single nave hall with side chapels, a slightly projecting transept, a covered transept with a dome and a deep choir ending in a semicircular apse.

The Basilica of St. Peter, is the largest Christian church on the planet and considered one of the most sacred places of Catholicism. Churches have been built on the site of the basilica since the fourth century. The construction of the current building began on April 18, 1506, under Pope Julius II, and was completed on November 18, 1626. The building is the work of some of the most renowned architects in history, such as Donato Bramante, Miguel Ángel or Bernini.
St. Peter is traditionally the site of the papal coronation, but it was also, under the impetus of Charlemagne in 800, the coronation church of the first Holy Roman Emperors.