The Mausoleum of Hadrian, usually known as Castel Sant'Angelo (Italian pronunciation: [kaˈstɛl sanˈtandʒelo]; English: Castle of the Holy Angel), is a towering cylindrical building in Parco Adriano, Rome, Italy. The Roman Emperor Hadrian initially commissioned it as a mausoleum for himself and his family. The pope later used the building as a fortress and castle and is now a museum. The structure was once the tallest building in Rome.

Old St. Peter's Basilica was the building that stood from the 4th to 16th centuries, where the new St. Peter's Basilica stands today in Vatican City. Construction of the basilica, built over the historical site of the Circus of Nero, began during the reign of Emperor Constantine I. The name "old St. Peter's Basilica" has been used since the construction of the current basilica to distinguish the two buildings.

Vatican City is an independent city-state, microstate, and enclave within Rome, Italy. Also known as The Vatican, the state became independent from Italy in 1929 with the Lateran Treaty. It is a distinct territory under "full ownership, exclusive dominion, and sovereign authority and jurisdiction" of the Holy See. It is a sovereign entity of international law which maintains the city state's temporal, diplomatic, and spiritual independence. With an area of 49 hectares and a 2019 population of about 453, it is the smallest state in the world by area and population. As governed by the Holy See, Vatican City State is an ecclesiastical or sacerdotal-monarchical state ruled by the Pope, the bishop of Rome, and the head of the Catholic Church. The highest state functionaries are all Catholic clergy of various origins. After the Avignon Papacy (1309–1377), the popes mainly resided at the Apostolic Palace in Vatican City.

The Janiculum (/dʒəˈnɪkjʊləm/; Italian: Gianicolo [dʒaˈniːkolo]), occasionally the Janiculan Hill, is a hill in western Rome, Italy. Although it is the second-tallest hill (the tallest being Monte Mario) in the contemporary city of Rome, the Janiculum does not figure among the proverbial Seven Hills of Rome, being west of the Tiber and outside the boundaries of the ancient city.

Ponte Sant'Angelo, originally the Aelian Bridge or Pons Aelius, is a Roman bridge in Rome, Italy, completed in 134 AD by Roman Emperor Hadrian (Publius Aelius Hadrianus), to span the Tiber from the city centre to his newly constructed mausoleum, now the towering Castel Sant'Angelo. The bridge is faced with travertine marble and spans the Tiber with five arches, three of which are Roman; it was approached using a ramp from the river. The bridge is now solely pedestrian and provides a scenic view of Castel Sant'Angelo. It links the rioni of Ponte (named after the bridge itself), and Borgo, to whom the bridge administratively belongs.

The Tiber Island (Italian: Isola Tiberina, Latin: Insula Tiberina) is the only river island in the part of the Tiber which runs through Rome. Tiber Island is located in the southern bend of the Tiber.

The construction of the current bridge occurred between 1473 and 1479, and was commissioned by Pope Sixtus IV (r. 1471–84), after whom it is named, from the architect Baccio Pontelli, who reused the foundations of a prior Roman bridge, the Pons Antoninus, which had been destroyed during the early Middle Ages. Currently traffic on the bridge is restricted to pedestrians. (According to Mandell Creighton's History of the Papacy, the Sistine Bridge was built of blocks from the Coliseum. Further, Sixtus was mindful of the disaster which had occurred in the Jubilee of 1450 through the crowding of the Bridge of S. Angelo, which was the only available means of communication with S. Peter's.)

La basilica di San Giovanni Battista dei Fiorentini è un luogo di culto cattolico di Roma. Dedicata a san Giovanni Battista, fu iniziata nel XVI secolo e completata nel XVIII all'inizio di Via Giulia come chiesa nazionale dei fiorentini a Roma. È basilica minore e sede dell'omonima parrocchia.

The Fontana or Fontanone di Ponte Sisto, once known as the Fontanone dei Cento Preti, is an early 17th-century, monumental fountain in Piazza Trilussa, facing the south end of the Ponte Sisto in Trastevere, Rome, Italy. It was reconstructed here in the late 19th century, erected initially across the river, and attached to the former building of the Collegio Ecclesiastical.

The bridge was designed by architect Angelo Vescovali and built between 1885 and 1895; it was dedicated to Umberto I, King of Italy, who inaugurated the bridge with his consort Margherita of Savoy. The bridge links the Palace of Justice (popularly known as Palazzaccio) to the area surrounding Piazza Navona.[2]

Lungotevere Prati, in the rione of the same name, stands for the unusual neo-Gothic style religious building, completed in 1917 to a design by the Bolognese architect Giuseppe Gualandi.

The Roman Ghetto or Ghetto of Rome (Italian: Ghetto di Roma) was a Jewish ghetto established in 1555 in the Rione Sant'Angelo, in Rome, Italy, in the area surrounded by present-day Via del Portico d'Ottavia, Lungotevere dei Cenci, Via del Progresso and Via di Santa Maria del Pianto, close to the River Tiber and the Theatre of Marcellus. Except for brief periods under Napoleon from 1808 to 1815 and under the Roman Republics of 1798–99 and 1849, the ghetto of Rome was controlled by the papacy until the capture of Rome in 1870.[1]