| Year | From | To | ||
|---|---|---|---|---|
| 1571 | Diocese of Hierapetra, Greece
Diocese of Sitia, Greece | United | Diocese of Hierapetra et Sitia, Greece | United |
| 1821 | Archdiocese of Gniezno, Poland
Diocese of Poznań, Poland | United | Archdiocese of Gniezno e Poznań, Poland | United |
| 1821 | Diocese of Samland (Sambia), Poland | Suppressed | Diocese of Warmia (Ermland), Poland | Territory Added |
| 1844 | Vicariate Apostolic of Western Oceania | Territory Lost | Vicariate Apostolic of Melanesia, Pacific (Oceania)
Vicariate Apostolic of Micronesia, Pacific (Oceania) | Erected |
| 1849 | Missionary Sons of the Immaculate Heart of Mary | Founded | ||
| 1851 | Diocese of Capaccio, Italy | Name Changed | Diocese of Capaccio e Vallo della Lucania, Italy | Name Changed |
| 1897 | Diocese of Niterói (Nictheroy), Brazil | Name Changed | Diocese of Petrópolis, Brazil | Name Changed |
| 1901 | Diocese of Concepción, Chile | Territory Lost | Prefecture Apostolic of Araucanía, Chile | Erected |
| 1920 | Delegation to East Indies (Added Burma) | Territory Added | ||
| 1927 | Diocese of Nagasaki, Japan (Saga, Fukuoka, Kumamoto, Oita, and Miyazaki) | Territory Lost | Diocese of Fukuoka, Japan | Erected |
| 1949 | Diocese of Concepción y Chaco, Paraguay | Name Changed | Diocese of Concepción (Santissima Concezione) en Paraguay | Name Changed |
| 1950 | Prefecture Apostolic of Shunsen, Korea (South) | Name Changed | Prefecture Apostolic of Chunchon, Korea (South) | Name Changed |
| 1955 | Archdiocese of Belo Horizonte, Minas Gerais, Brazil (Santo Antonio, Sant'Ana, Baldim, Fortuna, Inhaúma, Jaboticatubas, Jequitibá, Maravilhas, Martinho Campos, Matosinhos, Papagaio, Pequi, Pompéu, and Prudente de Moráis)
Archdiocese of Diamantina, Minas Gerais, Brazil (Cedro, Lagoa Bonita, Paraopeba, Pirapama, and Biacho Fundo) | Territory Lost | Diocese of Sete Lagoas, Minas Gerais, Brazil | Erected |
| 1955 | Archdiocese of Utrecht, Netherlands (Groningen, Friesland, and Drenthe, along with the Noord-Oost-Polder) | Territory Lost | Diocese of Groningen, Netherlands | Erected |
| 1955 | Diocese of Haarlem, Netherlands (Zuid-Holland) | Territory Lost | Diocese of Rotterdam, Netherlands | Erected |
| 1959 | Vicariate Apostolic of Port Moresby, Papua New Guinea (Kairuku, Goilala, Kerema, and Orokolo) | Territory Lost | Vicariate Apostolic of Yule Island, Papua New Guinea | Erected |
| 1959 | Vicariate Apostolic of Port Moresby, Papua New Guinea | Territory Lost | Prefecture Apostolic of Daru, Papua New Guinea | Erected |
| 1959 | Diocese of Kaduna, Nigeria | Elevated | Archdiocese of Kaduna, Nigeria | Elevated |
| 1959 | Diocese of Jos, Nigeria (from Onitsha) | Metropolitan Changed | ||
| 1959 | Diocese of Oturkpo, Nigeria (from Onitsha) | Metropolitan Changed | ||
| 1973 | Diocese of Città della Pieve, Italy (San Lazzaro alle Piazza and Gamporsevoli (both in Getona)) | Territory Lost | Diocese of Chiusi e Pienza, Italy | Territory Added |
| 1975 | Patriarchate of Lisboa {Lisbon}, Portugal (Santarem) | Territory Lost | Diocese of Santarém, Portugal | Erected |
| 1975 | Diocese of Beja, Portugal (Melides/Ponta de Troia (in Grandola))
Archdiocese of Évora, Portugal (Canha, Pegoês, and Santo Isidro (all in Montijo) and Comporta (in Alcázar do Sal)) Patriarchate of Lisboa {Lisbon}, Portugal (Setubal) | Territory Lost | Diocese of Setúbal, Portugal | Erected |
| 1988 | Vicariate Apostolic of Riohacha, Colombia | Elevated | Diocese of Riohacha, Colombia | Elevated |
| 1988 | Diocese of Nardò-Gallipoli, Italy (S. Michele Arcangelo, Beata Vergine Maria di Costantinopoli, and S. Barbara Vergine e Martire (all in Galatina)) | Territory Lost | Archdiocese of Otranto, Italy | Territory Added |
| 1988 | Archdiocese of Otranto, Italy (Sant'Antonio da Padova and Sant'Eufemia (both in Tricase)) | Territory Lost | Diocese of Ugento-Santa Maria di Leuca, Italy | Territory Added |
| 1988 | Archdiocese of Otranto, Italy (Presentazione del Signore (in Melendugno)) | Territory Lost | Archdiocese of Lecce, Italy | Territory Added |
| 2002 | Territorial Abbey of Subiaco, Italy | Territory Lost | Diocese of Anagni-Alatri, Italy (S. Maria in Trevi nel Lazio and Blessed Vergine Maria Fugium Peccatorum in Trevi nel Lazio, and Fraz. Altipiani di Arcinazzo)
Suburbicarian See of Palestrina, Italy (S. Nicola in Bellegra and S. Sisto in Bellegra, S. Maria in Roiate and Seconda Cura SS. Salvatore in Roiate, and S. Maria Assunta in Rocca Santo Stefano) Diocese of Tivoli, Italy (S. Andrea Apostolo in Subiaco, S. Andrea Apostolo (cura) in Subiaco, S. Maria Assunta della Valle in Subiaco, S. Francesco d'Assisi in Subiaco, S. Chelidonia in Subiaco contrada Vignola, S. Giuseppe in Subiaco, (Livata-Campo dell'Osso), S. Felicita ...) | Territory Added |
| 2007 | Diocese of Kota Kinabalu, Malaysia (Sandakan and Tawau) | Territory Lost | Diocese of Sandakan, Malaysia | Erected |
| 2012 | Diocese of Mangalore, India (Udupi, Kundapura, and Karkala) | Territory Lost | Diocese of Udupi, India | Erected |
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