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Diocese of Rome
Dioecesis Urbis seu Romana
Diocesi di Roma
|Country||Italy, Vatican City|
|Coordinates||41°53′9.26″N12°30′22.16″E / 41.8859056°N 12.5061556°E Coordinates: 41°53′9.26″N12°30′22.16″E / 41.8859056°N 12.5061556°E|
|Area||881 km2 (340 sq mi)|
- Catholics (including non-members)
|(as of 2013)|
|Sui iuris church||Latin Church|
|Cathedral||Archbasilica of Saint John Lateran|
|Patron saint|| Saint Peter |
Saint Catherine of Siena
Saint Philip Neri
Saint Lawrence of Rome
|Source: Annuario Pontificio 2012|
The Diocese of Rome (Latin : Dioecesis Urbis seu Romana;  Italian : Diocesi di Roma), also called the Vicariate of Rome,  is the ecclesiastical district under the direct jurisdiction of the Pope, who is Bishop of Rome and hence the supreme pontiff and head of the worldwide Catholic Church. As the Holy See, the papacy is a sovereign entity with diplomatic relations,  and civil jurisdiction over the Vatican City State located geographically within Rome. The Diocese of Rome is the metropolitan diocese of the Province of Rome, an ecclesiastical province in Italy. The first bishop of Rome was Saint Peter in the first century. The incumbent since 13 March 2013 is Pope Francis.
Historically, many Rome-born men, as well as others born elsewhere on the Italian Peninsula have served as bishops of Rome. Since 1900, however, there has been only one Rome-born bishop of Rome, Pius XII (1939–1958). In addition, throughout history non-Italians have served as bishops of Rome, beginning with the first of them according to Catholic tradition, Saint Peter.
It is the metropolitan archdiocese of the Roman ecclesiastical province and primatial see of Italy. The cathedral is the Archbasilica of Saint John Lateran. The primate of Italy is the pope, holding primacy of honor over the Italian sees and also primacy of jurisdiction over all other episcopal sees by Catholic tradition.
The pope is the bishop of Rome. Some of his titles derive from his role as head of the diocese of Rome. Those officially listed for him in the Annuario Pontificio are:[ citation needed ]
The title "pope" does not appear in the official list, but is commonly used in the titles of documents, and appears, in abbreviated form, in the signatures of the popes.
The best evidence available for the origins of the Church in Rome is Saint Paul's Epistle to the Romans. This indicates that the church was established probably by the early 40s AD. Saint Peter became associated with this church sometime between the year 58 and the early 60s. 
According to one historian:
The final years of the first century and the early years of the second constitute the "postapostolic" period, as reflected in the extrabiblical writings of Clement of Rome and Ignatius of Antioch. By now the church at Rome was exercising a pastoral care that extended beyond its own community, having replaced Jerusalem as the practical center of the growing universal Church. Appeals were made to Peter and Paul, with whom the Roman church was most closely identified. 
On 6 January 2023, by the apostolic constitution In Ecclesiarum Communione, Pope Francis reorganised the diocese to make it more collegial and to reinforce the role of the pope in it. 
The diocese covers a territory of 881 square kilometres (340 sq mi)  of which 0.44 square kilometres (0.17 sq mi) is in the Vatican City State. The diocese has 1,219 diocesan priests of its own, while 2,331 priests of other dioceses, 5,072 religious priests and 140 Opus Dei priests reside in its territory, as do 2,266 women religious.  In 2004, they ministered to an estimated 2,454,000 faithful, who made up 88% of the population of the territory.
The city of Rome has grown beyond the boundaries of the diocese. Notable parts of the city belong to the dioceses of Ostia and Porto-Santa Rufina. Ostia is administered together with the Vicariate of the city and thus included in the statistics given below, while Porto is instead administered by its own diocesan bishop. The diocese covers an area of 849 km2 and includes most of the city and the municipality of Rome in Italy, and the entire territory of Vatican City. The diocese is divided into two vicariates, each with its respective vicar general.
Two vicars general exercise the episcopal ministry and pastoral government for their respective territories within the diocese of Rome. Unless the bishop of a diocese reserves some acts to himself, vicars general have by law within a diocese the power to undertake all administrative acts that pertain to the bishop except those that in law require a special mandate of the bishop. 
This vicariate has responsibility for the territory of Vatican City. It consists of two parishes: Saint Peter's Basilica and Saint Anne in Vatican.   Its pastoral mission with respect to residents of its territory is minimal. It is primarily concerned with providing appropriate services to tourists, pilgrims, and others in Rome who avail themselves of services provided in Vatican City. Since 1991, the vicar general for Vatican City has been the cardinal who is the archpriest of St. Peter's Basilica, currently Cardinal Mauro Gambetti.
|1|| Agostino Zampini , O.S.A. |
|30 May 1929 – 7 June 1937|
|2|| Alfonso Camillo De Romanis , O.S.A.|
|20 August 1937 – 18 January 1950|
|3|| Petrus Canisius Van Lierde, O.S.A.|
|13 January 1951 – 14 January 1991|
|–|| Aurelio Sabattani |
|14 January 1991 – 1 July 1991|
|4|| Virgilio Noè |
|1 July 1991  – 24 April 2002  |
|5|| Francesco Marchisano |
|24 April 2002  – 5 February 2005  |
|6|| Angelo Comastri |
|5 February 2005  – 20 February 2021  |
|7|| Mauro Gambetti, O.F.M. Conv. |
|20 February 2021  – present|
The vicariate general (Vicariatus urbis) for the diocesan territory outside of Vatican City, territory that is under Italian sovereignty, is based at the Archbasilica of Saint John Lateran, which is the cathedral of the diocese. The vicar general for the Vicariate of Rome has for centuries been called the cardinal vicar (Italian : Cardinale Vicario). The vicariate has 336 active and 5 suppressed parishes in its territory.  Since 1970 the vicar of the city of Rome has also been assigned the office of archpriest of the Lateran Archbasilica, where the diocesan curia has its headquarters. From a strictly pastoral point of view, the diocese is divided into five sectors: north, south, east, west, and center. Each sector is assigned an auxiliary bishop who collaborates with the vicar general and the vicegerent in the pastoral administration of the diocese. The five bishops of the sectors can be joined by other auxiliary bishops for specific pastoral areas such as health care ministry.
Six of the dioceses of the Roman Province are described as suburbicarian.  Each suburbicarian diocese has a cardinal bishop at its titular head.
There remains the titular Suburbicarian See of Ostia, held, in addition to his previous suburbicarian see, by the cardinal bishop elected to be the dean of the College of Cardinals. The Diocese of Ostia was merged with the Diocese of Rome in 1962, and is now administered by a vicar general, in tight cooperation with the vicar general for Rome. It was also diminished to contain only the cathedral parish of Ostia (Sant'Aurea in Ostia Antica), which, however, in 2012 was divided into two parishes, who together form the present diocese of Ostia.
Other Italian dioceses having Rome as their metropolitan see:
Numerous ordinaries and personal prelatures outside the Province of Rome, worldwide, are "Exempt", i.e. "directly subject to the Holy See", not part of any ecclesiastical province, including:
A prelate is a high-ranking member of the Christian clergy who is an ordinary or who ranks in precedence with ordinaries. The word derives from the Latin praelatus, the past participle of praeferre, which means 'carry before', 'be set above or over' or 'prefer'; hence, a prelate is one set over others.
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