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Terracina Cathedral was built between the 5th and 6th centuries using what was left of an ancient Roman temple with five naves in the city's forum. The building has undergone various interventions and restorations, including that of the 11th century, that of the 13th century and, above all, the restoration of the 18th century, which reduced the church from five naves to three with the construction of side chapels and the barrel vaulted ceiling in place of the Romanesque farmhouses.

The Basilica of Sant'Andrea delle Fratte was built between 1653 and 1662 but a church already existed on the site in the 11th century. The Baroque reconstruction of the 17th century is the work of Francesco Borromini, but the façade dates back to 1862. The church is the place where the famous conversion of Alphonse Ratisbonne (1814-1848) took place.

The original cathedral in Alessandria was created upon the pope's establishment of a diocese here in 1175. The cathedral was then expanded in the 13th century and lasted until 1803, when Napoleon's troops demolished it for tactical reasons. It was then rebuilt between 1807 and 1810 in its modern neoclassical form.

The church of San Lorenzo or the Nativity of the Virgin Mary is a Lugurian Gothic church of the 14th century. The façade, made of local sandstone, has a Gothic portal and a rose window in Carrara marble dating back to 1375. The inside of the church, covered in baroque style, has three naves with barrel vaults. A restoration at the end of the 20th century partially restored the original Gothic forms.

The Basilica of Santa Maria ad Martyres, commonly known as the Pantheon, is an ancient Roman religious building built in the 1st century B.C. on the orders of Agrippa. Damaged by several fires, it was completely rebuilt under Hadrian (early 2nd century), and transformed into a church in the 7th century. The Pantheon is the largest ancient Roman monument that has survived in a virtually intact state. It has had an enormous influence on European architecture, both secular and sacred.

The first cathedral of Tivoli was built on the site of a Roman forum from the 8th century onwards. The church was profoundly restructured in the 11th century with the addition of a Romanesque campanile and the opening of three naves. In 1634 Cardinal Giulio Roma was appointed Bishop of Tivoli and in 1635 he immediately ordered the total reconstruction of the building, with the exception of the bell tower. The main part of the church was completed in 1640 and the consecration took place on 1st February 1641. Work on the façade and the portico was completed in 1650.

Todi Cathedral was built in the 13th century on the site of a Roman building. It was almost completely destroyed by fire in 1190 and was completed in the 14th century and remodelled several times. The façade dates from the 13th century but has undergone several modifications, the last in the 16th century. The remarkable central rose window was started in 1515 and was completed under Bishop Billioti between 1517 and 1523. Its stained glass windows are not original and date from the 19th-century restoration work.

The Basilica of Santa Maria Assunta, dating from the seventh century, is the main place of Catholic worship on the island of Torcello, in the lagoon of Venice, and the old cathedral of the former diocese of Torcello. The building is a significant example of Venetian-Byzantine style.

Tortona Cathedral was built between 1574 and 1592. It was consecrated (mid-construction) in 1583 by Bishop Cesare Gambara. The neoclassical façade, designed by the architect Nicolò Bruno, dates back to the second half of the 19th century (1880-85).

Trani Cathedral was built between 1099 and 1143 during the period of Norman rule. The cathedral is an example of the Romanesque architecture of Puglia. It was built with the typical limestone tufa extracted from the quarries of the town, characterised by a very light pink, almost white colour. The church stands out for its important transept and for the use of the ogival arch forming a passage under the bell tower, a rare phenomenon in Romanesque architecture.