| Year | From | To | ||
|---|---|---|---|---|
| 1778 | Archdiocese ofSantafé en Nueva Granada,Colombia | Territory Lost | Diocese ofMérida,Venezuela | Erected |
| 1872 | Diocese ofBoston, Massachusetts,USA Diocese ofHartford, Connecticut,USA | Territory Lost | Diocese ofProvidence, Rhode Island,USA (RI plus the Counties of Bristol, Barnstable, Dukes, and Nantucket along with part of Plymouth in Massachusetts) | Erected |
| 1872 | Diocese ofAlbany, New York,USA | Territory Lost | Diocese ofOgdensburg, New York,USA (Counties of St. Lawrence, Franklin, Clinton, Ifferson, Lewis, and Essex along with parts of Hamiliton and De Herkimer) | Erected |
| 1921 | Diocese ofSan José de Costa Rica (Alajuela, Puntarenas, and Guanacaste.) | Territory Lost | Diocese ofAlajuela,Costa Rica | Erected |
| 1921 | Diocese ofSan José de Costa Rica (Limón and the Carthaginian Canton of Turrialba) | Territory Lost | Vicariate Apostolic ofLimón,Costa Rica | Erected |
| 1921 | Diocese ofSan José de Costa Rica (San José, Heredia, and Cartago) | Elevated | Archdiocese ofSan José de Costa Rica | Elevated |
| 1922 | Vicariate Apostolic ofKuiceu (Kweichow),China (Panhien, Pougan, Ganlan, Hinjen, Hiny, Tchenfong, Lanlong, Tsehen, and Loufou along with Matchang, Nicoutchang, Tchehiang (in Kouanlin) and Potang, Hohon, Yangkia, and Cheten (in Tseyuin)) Vicariate Apostolic ofKuamsi,China (Liniun, Silong, and Silin) | Territory Lost | Prefecture Apostolic ofLanlung [Anlong],China | Erected |
| 1952 | Diocese ofBaker City, Oregon,USA | Name Changed | Diocese ofBaker, Oregon,USA | Name Changed |
| 1952 | Diocese ofAmazonas,Brazil | Elevated | Archdiocese ofManaus, Amazonas,Brazil (and name change) | Elevated |
| 1952 | Diocese ofLins, Sao Paulo,Brazil | Territory Lost | Diocese ofMarília, Sao Paulo,Brazil | Erected |
| 1952 | Diocese ofNatal,Brazil | Territory Lost | Archdiocese ofNatal, Rio Grande do Norte,Brazil | Erected |
| 1952 | Diocese ofMossoró, Rio Grande do Norte,Brazil (from Paraíba) | Metropolitan Changed | ||
| 1952 | Diocese ofCaicó, Rio Grande do Norte,Brazil (from Paraíba) | Metropolitan Changed | ||
| 1952 | Territorial Prelature ofRio Branco,Brazil (from Belém do Pará) | Metropolitan Changed | ||
| 1952 | Territorial Prelature ofRio Negro, Amazonas,Brazil (from Belém do Pará) | Metropolitan Changed | ||
| 1952 | Territorial Prelature ofJuruá, Acre,Brazil (from Belém do Pará) | Metropolitan Changed | ||
| 1952 | Territorial Prelature ofLábrea, Amazonas,Brazil (from Belém do Pará) | Metropolitan Changed | ||
| 1952 | Territorial Prelature ofPorto Velho, Rondonia,Brazil (from Belém do Pará) | Metropolitan Changed | ||
| 1952 | Territorial Prelature ofSão Peregrino Laziosi no Alto Acre e Alto Purus,Brazil (from Belém do Pará) | Metropolitan Changed | ||
| 1952 | Territorial Prelature ofAlto Solimões, Amazonas,Brazil (from Belém do Pará) | Metropolitan Changed | ||
| 1952 | Territorial Prelature ofTefé, Amazonas,Brazil (from Belém do Pará) | Metropolitan Changed | ||
| 1953 | Diocese ofHarbour Grace, Newfoundland,Canada (Boundaries adjusted) Diocese ofSaint George’s, Newfoundland,Canada (Boundaries adjusted) Archdiocese ofSaint John’s, Newfoundland,Canada (Boundaries adjusted) | Territory Added | ||
| 1958 | Diocese ofCiudad Victoria-Tamaulipas, Tamaulipas,México (Nueva Laredo, Guerrero, Mier, Miguel Alemán, Camargo, Reynosa, Méndez, Matamoros, Valle Hermosa, San Fernando, Cruillas, San Nicolás, and Burgos) | Territory Lost | Diocese ofMatamoros, Tamaulipas,México | Erected |
| 1958 | Diocese ofEspírito Santo,Brazil (Cachoeiro de Itapemirim, Alegre, Castelo, Guaçui, Iconha, Itapemirim, Luna, Mimoso do Sul, Muniz Freiré, Muqui, Rio Novo de Sul, São José do Calcado, and Vaia do Sousa) | Territory Lost | Diocese ofCachoeiro do Itapemirim, Espirito Santo,Brazil | Erected |
| 1958 | Diocese ofEspírito Santo,Brazil | Territory Lost | Diocese ofSão Mateus, Espirito Santo,Brazil | Erected |
| 1958 | Diocese ofEspírito Santo,Brazil | Name Changed | Archdiocese ofVitória, Espirito Santo,Brazil | Name Changed |
| 1959 | Diocese ofSinaloa,México | Name Changed | Diocese ofCuliacán, Sinaloa,México | Name Changed |
| 1963 | Diocese ofLingayen-Dagupan,Philippines Diocese ofSan Fernando,Philippines | Territory Lost | Diocese ofCabanatuan,Philippines (Nueva Ecija) | Erected |
| 1963 | Diocese ofSan Fernando,Philippines | Territory Lost | Diocese ofTarlac,Philippines | Erected |
| 1963 | Diocese ofLingayen-Dagupan,Philippines | Elevated | Archdiocese ofLingayen-Dagupan,Philippines | Elevated |
| 1963 | Delegation toBelgian Congo | Elevated | Nunciature toCongo, Democratic Republic of | Elevated |
| 1966 | Nunciature toFinland (to Nunciature) | Elevated | ||
| 1968 | Diocese ofIringa,Tanzania Territorial Abbey ofPeramiho,Tanzania | Territory Lost | Diocese ofNjombe,Tanzania (Njombe District) | Erected |
| 1984 | Diocese ofTagum,Philippines (Davao Oriental) | Territory Lost | Diocese ofMati,Philippines | Erected |
| 1984 | Diocese ofCabanatuan,Philippines (Oarranglan, Cuyapo, Guimba, Licab, Llanera, Lupao, Munoz, Nampicuan, Pantabangan, Quezon, Rizal, Santo Domingo, Talugtog, and San José City) | Territory Lost | Diocese ofSan Jose,Philippines | Erected |
| 1991 | Diocese ofViterbo, Acquapendente, Bagnoregio, Montefiascone, Tuscania e San Martino al Monte Cimino,Italy | Name Changed | Diocese ofViterbo,Italy | Name Changed |
| 1991 | Diocese ofCivita Castellana (, Orte, Gallese, Nepi e Sutri),Italy | Name Changed | Diocese ofCivita Castellana,Italy | Name Changed |
| 1994 | Nunciature toSuriname,Antilles | Established | ||
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