| Date | From | To | ||
|---|---|---|---|---|
| unknown | Archeparchy of Sivas {Sebaste} (and Tokat {Toqat}) (Armenian), Turkey | Suppressed | ||
| unknown | Titular See of Dumium | Established | ||
| unknown | Titular See of Amida degli Armeni | Established | ||
| unknown | Titular See of Garin degli Armeni | Established | ||
| unknown | Titular See of Kharput degli Armeni | Established | ||
| unknown | Titular See of Marasc degli Armeni | Established | ||
| unknown | Titular See of Mardin degli Armeni | Established | ||
| unknown | Titular See of Mardin dei Siri | Established | ||
| unknown | Titular See of Mardin dei Caldei | Established | ||
| unknown | Titular See of Melitene degli Armeni | Established | ||
| unknown | Titular See of Sebaste degli Armeni | Established | ||
| unknown | Titular See of Ancyra degli Armeni | Established | ||
| unknown | Titular See of Artvin degli Armeni | Established | ||
| unknown | Titular See of Caesarea in Cappadocia degli Armeni | Established | ||
| unknown | Titular See of Mush degli Armeni | Established | ||
| unknown | Titular See of Prusa degli Armeni | Established | ||
| unknown | Titular See of Tokat degli Armeni | Established | ||
| unknown | Titular See of Trapezus degli Armeni | Established | ||
| unknown | Titular See of Adana degli Armeni | Established | ||
| 21 Jan | Territorial Prelature of Humahuaca, Argentina (Susques) | Territory Lost | Archdiocese of Salta, Argentina | Territory Added |
| 21 Jan | Diocese of Orán, Argentina (Santa Victoria and Iruya) | Territory Lost | Territorial Prelature of Humahuaca, Argentina | Territory Added |
| 25 Jan | Diocese of Tampico, Tamaulipas, México (Soto la Marina) | Territory Lost | Diocese of Ciudad Victoria, Tamaulipas, México | Territory Added |
| 18 Feb | Diocese of Amiens, France (Ytres (in Somme and Pas-de-Calais)) | Territory Lost | Diocese of Arras (-Boulogne-Saint-Omer), France | Territory Added |
| 6 Mar | Nunciature to Algeria | Established | ||
| 22 Mar | Nunciature to Tunisia | Established | ||
| 23 Mar | Diocese of Meerut, India (Bijnor (except the part called Dhampar), Garwal, Tehri, Chamoli, and Uttarkasi) | Territory Lost | Apostolic Exarchate of Bijnor (Syro-Malabar), India | Erected |
| 23 Mar | Prefecture Apostolic of Raipur, India (Bastar) | Territory Lost | Apostolic Exarchate of Jagdalpur (Syro-Malabar), India | Erected |
| 25 Mar | Diocese of Colima, México (Atenquique, Huescalapa, San Gabriel, Santa Cruz del Cortijo, San Juan de la Montaña, Tamazula, Tuxpan, and Zapotiltic)
Archdiocese of Guadalajara, Jalisco, México (San José and San Antonio, existing in the city of Ciudad Guzmán; Atemajac de Brizuela, Amacueda, Atoyac, Concepción de Buenos Aires, Chiquilistlán, Mazamitla, Manzanilla, Quitupán, Sayula, San Andrés Ixtlán, Teocuitatlán, Techaluta, Tapalpa, Tipazán ...) | Territory Lost | Diocese of Ciudad Guzmán, Jalisco, México | Erected |
| 25 Mar | Archdiocese of Guadalajara, Jalisco, México (De la Sangre de Cristo and Nuestra Señora de Guadalupe (in San Juan de Los Lagos); San Miguel and San Felipe de Jesús (in Atotonilco and Alto); San Francisco de Asís, Tototlán, Sagrada Familia, and San Francisco (in Tepatitlán); Capilla de Guadalupe, ...) | Territory Lost | Diocese of San Juan de los Lagos, Jalisco, México | Erected |
| 25 Mar | Diocese of Dodoma, Tanzania
Diocese of Mbeya, Tanzania Diocese of Mbulu, Tanzania Archdiocese of Tabora, Tanzania | Territory Lost | Diocese of Singida, Tanzania (Iramba, Singida, Manyoni, and parts of Taboraënsi) | Erected |
| 25 Mar | Patriarchal Exarchate of Kuwait (Melkite Greek) | Erected | ||
| 20 Apr | Diocese of Cap-Haïtien, Haïti
Diocese of Les Gonaïves, Haïti | Territory Lost | Diocese of Hinche, Haïti (Hinche, Thomonde, Thomassique, Los Palis, Maissade, CercaCarvajal, Pignon, La Victoire, Mombin-Crochu, Cercala Source, along with Bois-Laurent) | Erected |
| 20 Apr | Diocese of Les Cayes, Haïti (Grande Anse and Anse d'Hainault) | Territory Lost | Diocese of Jérémie, Haïti | Erected |
| 28 Apr | Diocese of Calabar, Nigeria (Ututu) | Territory Lost | Diocese of Umuahia, Nigeria | Territory Added |
| 29 Apr | Delegation to Eastern Africa | Established | Nunciature to Sudan | Established |
| 16 May | Diocese of Valencia en Venezuela (Estado, Cojedes) | Territory Lost | Diocese of San Carlos de Venezuela | Erected |
| 22 May | Archdiocese of Colombo in Ceylon, Sri Lanka | Name Changed | Archdiocese of Colombo, Sri Lanka | Name Changed |
| 31 May | Diocese of Tonga, Pacific (Oceania) (Niue Island) | Territory Lost | Diocese of Rarotonga, Cook Islands, Pacific (Oceania) | Territory Added |
| 10 Jun | Pontifical Commission for the Redaction of the Code of Oriental Canon Law, Roman Curia | Name Changed | Pontifical Commission for the Revision of the Code of Oriental Canon Law, Roman Curia | Name Changed |
| 14 Jun | Archdiocese of Luluabourg, Congo (Dem. Rep.) | Name Changed | Archdiocese of Kananga, Congo (Dem. Rep.) | Name Changed |
| 19 Jun | Diocese of Bagé, Rio Grande do Sul, Brazil (Mata and Sao Vincente do Sul) | Territory Lost | Diocese of Santa Maria, Rio Grande do Sul, Brazil | Territory Added |
| 20 Jun | Diocese of Lipa, Philippines | Elevated | Archdiocese of Lipa, Philippines | Elevated |
| 20 Jun | Territorial Prelature of Infanta, Philippines (from Manila) | Metropolitan Changed | ||
| 20 Jun | Diocese of Lucena, Philippines (from Manila) | Metropolitan Changed | ||
| 20 Jun | Vicariate Apostolic of Calapan, Philippines (from Manila) | Metropolitan Changed | ||
| 22 Jun | Archdiocese of Morelia, Michoacán, México (Enandio and Quanoro (in Benito Juárez)) | Territory Lost | Diocese of Tacámbaro, Michoacán, México | Territory Added |
| 28 Jun | Diocese of Berlin, Germany
Territorial Prelature of Schneidemühl, Poland (Trzcianka and Pila) Archdiocese of Wrocław {Breslavia}, Poland | Territory Lost | Diocese of Gorzów, Poland (Zielona Gora) | Erected |
| 28 Jun | Archdiocese of Olomouc, Czechia (Branice, Glubczyce, and Kietrz along with Owsiszcze)
Archdiocese of Wrocław {Breslavia}, Poland (Gliwice, Labedy, Miechowice, Pyskowice, Toszek, Ujazd, and Zabrze (all in Katowice)) | Territory Lost | Diocese of Opole, Poland | Erected |
| 28 Jun | Diocese of Berlin, Germany (Szczecin) | Territory Lost | Diocese of Szczecin-Kamień, Poland | Erected |
| 28 Jun | Diocese of Berlin, Germany
Territorial Prelature of Schneidemühl, Poland | Territory Lost | Diocese of Koszalin-Kołobrzeg, Poland (Koszalin, Lebork, and Kostkowo and Wierzchucino (in Gdánsk)) | Erected |
| 28 Jun | Diocese of Meißen (Meissen), Germany (Biedrzychowice, Bogatynia, Dzialoszyn, Krzewina, Opolno Zdrój, and Zatonie)
Archdiocese of Praha {Prague}, Czechia (Bystrzyca Klodzka, Klodzko, Nowa Ruda, and Polanica Zdroj) | Territory Lost | Archdiocese of Wrocław {Breslavia}, Poland | Territory Added |
| 28 Jun | Diocese of Nakuru, Kenya (Baringo) | Territory Lost | Diocese of Eldoret, Kenya | Territory Added |
| 28 Jun | Archdiocese of Wrocław {Breslavia}, Poland (Territory in Germany) | Territory Lost | Apostolic Administration of Görlitz, Germany | Erected |
| 1 Jul | Diocese of Rarotonga, Cook Islands, Pacific (Oceania) (from Wellington) | Metropolitan Changed | ||
| 12 Jul | Archdiocese of Modena (e Nonantola), Italy (Part of Piumalbo (in Abetone)) | Territory Lost | Diocese of Pistoia, Italy | Territory Added |
| 24 Jul | Diocese of Garzón-Neiva, Colombia | Split | Diocese of Garzón, Colombia
Diocese of Neiva, Colombia (La Inmaculada, San José, Perpetuo Socorro, San Vicente de Paul, San Judas Tadeo, and San Antonio Maria Claret (all in Neiva); Aipe, Algeciras, Anaconia, Barava, Campoalegre, Colombia, El Gaguán, Hobo, Iquira, Palermo, Rivera, Santa Ana, Santa Maria, ...) | Split |
| 30 Jul | Diocese of Ondo, Nigeria (Ekiti) | Territory Lost | Diocese of Ado-Ekiti, Nigeria | Erected |
| 15 Aug | Archdiocese of L’Aquila, Italy (became a Metropolitan) | Elevated | ||
| 15 Aug | Archdiocese of Perugia, Italy (became a Metropolitan) | Elevated | ||
| 15 Aug | Archdiocese of Ancona e Numana, Italy (became a Metropolitan) | Elevated | ||
| 15 Aug | Diocese of Jesi, Italy (from Immediately Subject to Ancona e Numana) | Metropolitan Changed | ||
| 15 Aug | Diocese of Osimo e Cingoli, Italy (from Immediately Subject to Ancona e Numana) | Metropolitan Changed | ||
| 15 Aug | Diocese of Marsi, Italy (from Immediately Subject to L’Aquila) | Metropolitan Changed | ||
| 15 Aug | Diocese of Valva e Sulmona, Italy (from Immediately Subject to L’Aquila) | Metropolitan Changed | ||
| 15 Aug | Diocese of Assisi, Italy (from Immediately Subject to Perugia) | Metropolitan Changed | ||
| 15 Aug | Diocese of Città di Castello, Italy (from Immediately Subject to Perugia) | Metropolitan Changed | ||
| 15 Aug | Diocese of Città della Pieve, Italy (from Immediately Subject to Perugia) | Metropolitan Changed | ||
| 15 Aug | Diocese of Gubbio, Italy (from Immediately Subject to Perugia) | Metropolitan Changed | ||
| 15 Aug | Diocese of Foligno, Italy (from Immediately Subject to Perugia) | Metropolitan Changed | ||
| 15 Aug | Diocese of Nocera Umbra-Gualdo Tadino, Italy (from Immediately Subject to Perugia) | Metropolitan Changed | ||
| 22 Aug | Diocese of Baudouinville, Congo (Dem. Rep.) | Name Changed | Diocese of Kalemie-Kirungu, Congo (Dem. Rep.) | Name Changed |
| 22 Aug | Diocese of Fort-Archambault, Chad | Name Changed | Diocese of Sarh, Chad | Name Changed |
| 24 Aug | Diocese of Mweka, Congo (Dem. Rep.) (Bena-Tshiadi) | Territory Lost | Archdiocese of Kananga, Congo (Dem. Rep.) | Territory Added |
| 7 Oct | Diocese of Modigliana, Italy (Portico e San Benedetto in Alpe, Rocca San Casciano, Dovadola, Castrocaro Terme, and Terra del Sole along with Premilcuore-Fantella) | Territory Lost | Diocese of Forli, Italy | Territory Added |
| 7 Oct | Diocese of Modigliana, Italy (San Giacomo in Converselle and Santa Maria in Ciola or Zola (in Brisighella)) | Territory Lost | Diocese of Faenza, Italy | Territory Added |
| 7 Oct | Diocese of Modigliana, Italy (Santa Maria in Cuzzano and San Biagio in Sartiirano (in Tredozio), San Pietro in Sentano, part of Santa Maria in Limisano (in Modigliana)) | Territory Lost | Diocese of Forli, Italy | Territory Added |
| 8 Oct | Archdiocese of Antequera, Oaxaca, México (S. Juan Bautista, S. Francisco de Asis, Santa María en Rio Sapo, and S. José Tenango) | Territory Lost | Territorial Prelature of Huautla, Oaxaca, México | Erected |
| 16 Nov | Prefecture Apostolic of Louis Trichardt, South Africa | Elevated | Diocese of Louis Trichardt-Tzaneen, South Africa | Elevated |
| 11 Dec | Diocese of Ado-Ekiti, Nigeria | Name Changed | Diocese of Ekiti, Nigeria | Name Changed |
| 13 Dec | Diocese of Oklahoma City and Tulsa, Oklahoma, USA | Elevated | Archdiocese of Oklahoma City, Oklahoma, USA (Split and raised to an Archdiocese)
Diocese of Tulsa, Oklahoma, USA (Adair, Atoka, Bryan, Cherokee, Choctaw, Coal, Craig, Creek, Delaware, Haskell, Hughes, Latimer, LeFlore, McCurtain, Mclntosh, Mayes, Muskogee, Nowata, Okfuskee, Okmulgee, Osage, Ottawa, Pawnee, Payne, Pittsburg, Pushmataha, Rogers, Sequoyah, Tulsa, ...) | Erected |
| 13 Dec | Diocese of Little Rock, Arkansas, USA (from New Orleans to Oklahoma City) | Metropolitan Changed | ||
| 18 Dec | Diocese of Kandy, Sri Lanka (Uva Province) | Territory Lost | Diocese of Badulla, Sri Lanka | Erected |
| 18 Dec | Diocese of Kuala Lumpur, Malaysia | Elevated | Archdiocese of Kuala Lumpur, Malaysia | Elevated |
| 18 Dec | Archdiocese of Malacca-Singapore | Split | Diocese of Malacca-Johor, Malaysia
Archdiocese of Singapore | Split |
| 18 Dec | Territorial Abbey of Ndanda, Tanzania | Elevated | Diocese of Mtwara, Tanzania | Elevated |
| 18 Dec | Diocese of Kagoshima, Japan (Ryu-Kyu)
Apostolic Administration of Okinawa and the Southern Islands (Ryukyus), Japan | Territory Lost | Diocese of Naha, Japan | Erected |
| 18 Dec | Diocese of Penang, Malaysia (from Malacca-Singapore) | Metropolitan Changed | ||
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