Diocese of Rome

The Archbasilica Cathedral of the Most Holy Savior and of Saints John the Baptist and John the Evangelist in the Lateran (Italian: Arcibasilica del Santissimo Salvatore e dei Santi Giovanni Battista ed Evangelista in Laterano), also known as the Papal Archbasilica of Saint John [in] Lateran, Saint John Lateran, or the Lateran Basilica, is a Catholic cathedral church of the Diocese of Rome in the city of Rome, and serves as the seat of the bishop of Rome, the pope. The archbasilica lies outside of Vatican City proper, which is located approximately 4 kilometres (2.5 mi) to the northwest. Nevertheless, as properties of the Holy See, the archbasilica and its adjoining edifices enjoy an extraterritorial status from Italy, pursuant to the terms of the Lateran Treaty of 1929.The church is the oldest and highest ranking of the four major papal basilicas as well as one of the Seven Pilgrim Churches of Rome, holding the unique title of "archbasilica". Founded in 324, it is the oldest public church in the city of Rome, and the oldest basilica of the Western world. It houses the cathedra of the Roman bishop, and has the title of ecumenical mother church of the Catholic faithful. The building deteriorated during the Middle Ages and was badly damaged by two fires in the 14th century. It was rebuilt in the late 16th century during the reign of Pope Sixtus V. The new structure's interior was renovated in the late 17th century, and its façade was completed in 1735 under Pope Clement XII. The current rector is Cardinal Archpriest Angelo De Donatis, Vicar General for the Diocese of Rome. The President of the French Republic, currently Emmanuel Macron, is ex officio the "First and Only Honorary Canon" of the archbasilica, a title that the heads of state of France have possessed since King Henry IV. The large Latin inscription on the façade reads: Clemens XII Pont Max Anno V Christo Salvatori In Hon SS Ioan Bapt et Evang. This abbreviated inscription translates as: "Pope Clement XII, in the fifth year [of his Pontificate, dedicated this building] to Christ the Savior, in honor of Saints John the Baptist and [John] the Evangelist". The inscription indicates, with its full title (see below), that the archbasilica was originally dedicated to Christ the Savior and, centuries later, co-dedicated to Saint John the Baptist and Saint John the Evangelist. Christ the Savior remains its primary dedication, and its titular feast day is 6 August, the Transfiguration of Christ. As the cathedral of the pope as bishop of Rome, it ranks superior to all other churches of the Catholic Church, including Saint Peter's Basilica.

The Vatican Historical Museum (Italian: Museo storico vaticano) is one of the sections of the Vatican Museums. It was founded in 1973 at the behest of Pope Paul VI, and was initially hosted in environments under the Square Garden. In 1987 it was moved to the main floor of the Apostolic Palace of the Lateran and opened in March 1991. The Vatican Historical Museum has a unique collection of portraits of the Popes from the sixteenth century to date, the memorable items of the Papal Military Corps of the 16–17th centuries and old religious paraphernalia related to rituals of the papacy. Also on display on the lower floor are the papamobili (Popemobiles); carriages and motorcars of Popes and Cardinals, including the first cars used by Popes.

The Lateran Palace (Latin: Palatium Lateranense), formally the Apostolic Palace of the Lateran (Latin: Palatium Apostolicum Lateranense), is an ancient palace of the Roman Empire and later the main papal residence in southeast Rome. Located on St. John's Square in Lateran on the Caelian Hill, the palace is adjacent to the Archbasilica of Saint John Lateran, the cathedral church of Rome. From the fourth century, the palace was the principal residence of the popes, and continued so for about a thousand years until the Apostolic Residence ultimately moved to the Vatican. The palace is now used by the Vatican Historical Museum, which illustrates the history of the Papal States. The palace also houses the offices of the Vicariate of Rome, as well as the residential apartments of the Cardinal Vicar, the pope's delegate for the daily administration of the diocese. Until 1970, the palace was also home to the important collections of the Lateran Museum, now dispersed among other parts of the Vatican Museums. Following the Lateran Treaty of 1929, the palace and adjoining basilica are extraterritorial properties of the Holy See.

The Pontifical Lateran University (Italian: Pontificia Università Lateranense; Latin: Pontificia Universitas Lateranensis), also known as Lateranum, is a pontifical university based in Rome. The university also hosts the central session of the Pontifical John Paul II Institute for Studies on Marriage and Family. The university is known as "The Pope's University". Its Grand Chancellor is the Vicar General to the Holy Father for the Diocese of Rome. As of 2014 the Pontifical Lateran university had students from more than a hundred countries. It is also sometimes also known as the Pontifical University of Apollinaire.

The Scala Sancta (English: Holy Stairs, Italian: Scala Santa) are a set of 28 white marble steps that are Roman Catholic relics located in an edifice on extraterritorial property of the Holy See in Rome, Italy proximate to the Archbasilica of Saint John in Laterano. Officially, the edifice is titled the Pontifical Sanctuary of the Holy Stairs (Pontificio Santuario della Scala Santa), and incorporates part of the old Papal Lateran Palace. Replica stairs flank the original staircase, which may only be climbed on one's knees. The Holy Stairs lead to the Church of Saint Lawrence in Palatio ad Sancta Sanctorum (Chiesa di San Lorenzo in Palatio ad Sancta Sanctorum) or simply the "Sancta Sanctorum" (English: Holy of Holies), which was the personal chapel of the early Popes. According to Roman Catholic tradition, the Holy Stairs were the steps leading up to the praetorium of Pontius Pilate in Jerusalem on which Jesus Christ stepped on his way to trial during his Passion. The Stairs reputedly were brought to Rome by Saint Helena in the fourth century. For centuries, the Scala Sancta has attracted Christian pilgrims who wish to honour the Passion of Jesus Christ. Since the early 1700s, the Holy Stairs have been encased in wood for protection, but were briefly exposed in 2019 following restoration work.

The domed octagonal Lateran Baptistery (Italian: Battistero lateranense) stands somewhat apart from the Archbasilica of Saint John Lateran, Rome, to which it has become joined by later construction. This baptistery was founded by Pope Sixtus III in 440, perhaps on an earlier structure, for a legend grew up that Constantine the Great had been baptized there and enriched the structure. However, it is more likely that if he was baptized it was in the Eastern part of the Roman Empire and possibly by an Arian bishop. This baptistry was for many generations the only baptistery in Rome, and its octagonal structure, centered upon the large octagonal basin for full immersions, provided a model for others throughout Italy, and even an iconic motif of illuminated manuscripts, "The fountain of Life". Around the central area, where is the basin of the font, an octagon is formed by eight porphyry columns, with marble Corinthian capitals and entablature of classical form. On the ceiling of the Baptistry is the story of the Battle of the Milvian Bridge (312 AD). An ambulatory surrounds the font and outer walls form a larger octagon. Attached to one side, towards the Lateran Basilica, is a fine porch with two porphyry columns and richly carved capitals, bases and entablatures. The Baptistery was subject to an elaborate restoration during the pontificate of Pope Urban VIII. While its interior architecture was consolidated and embellished after plans of Gian Lorenzo Bernini, a fresco cycle with scenes from the life of Constantine was added by Andrea Sacchi on the walls of the ambulatory. In the meantime the early Christian liturgy of Easter baptisms was reanimated by the Baroque popes, baptizing adult "turchi ed ebrei" ("Turks and Jews") in a public ceremony on Easter eve. Its plain brick exterior was later on embellished with a frieze designed by Francesco Borromini in 1657, incorporating the arms of Pope Alexander VII.

The Sancta Sanctorum (Italian: Chiesa di San Lorenzo in Palatio ad Sancta Sanctorum) is a Roman Catholic chapel entered via the Scala Sancta (Holy Staircase) of the Lateran Palace in Rome. It was the original private chapel of the papacy before it moved to Avignon, and later to the Vatican Palace. The chapel is the only building from the old Lateran Palace that was not destroyed during its reconstruction.

The Porta Asinaria is a gate in the Aurelian Walls of Rome. Dominated by two protruding tower blocks and associated guard rooms, it was built between 271 and 275 AD, at the same time as the Wall itself. It was not rebuilt or fortified in the time of Honorius and not restored by Theoderic as most of the other gates.It is through this gate that East Roman troops under General Belisarius entered the city in 536, reclaiming the city for the Byzantine Empire from the Ostrogoths. By the 16th century it had become overwhelmed by traffic. A new breach in the walls was made nearby to create the Porta San Giovanni. At this point, the Porta Asinaria was closed to traffic.

The Museum of the Liberation of Rome (Italian: Museo storico della Liberazione - Roma) is located in an apartment building at Via Tasso 145, Rome, close to the basilica of St. John Lateran. It records the period of German occupation of Rome (September 1943 - June 1944) in the Second World War and its subsequent liberation. The building housing the museum was used by the SS to torture members of the Italian Resistance in the first half of 1944.

The John Paul II Pontifical Theological Institute for Marriage and Family Sciences is a Roman Catholic pontifical institute of theological studies on marriage and family with affiliated campuses around the world.

Porta San Giovanni is a gate in the Aurelian Wall of Rome, Italy, named after the nearby Archbasilica of Saint John Lateran.

San Giovanni is an underground interchange station on Lines A and C of the Rome Metro. The station is located in Piazzale Appio at the beginning of Via Appia Nuova, beside the Basilica di San Giovanni in Laterano, from which the station takes its name. It opened in 1980 on Line A. On May 12, 2018, Line C was extended to the station. It serves as the westernmost terminus of Line C, pending its extension to Fori Imperiali, which is currently under construction.