| Year | From | To | ||
|---|---|---|---|---|
| 1870 | Vicariate Apostolic ofDahomey,Nigeria | Name Changed | Vicariate Apostolic ofCosta di Benin,Nigeria | Name Changed |
| 1911 | Prefecture Apostolic ofUpper Niger {Niger Superiore},Nigeria (Eastern part) | Territory Lost | Prefecture Apostolic ofEastern Nigeria {Nigeria Orientale} | Erected |
| 1911 | Prefecture Apostolic ofUpper Niger {Niger Superiore},Nigeria (Western part) | Name Changed | Prefecture Apostolic ofWestern Nigeria {Nigeria Occidentale} | Name Changed |
| 1917 | Diocese ofFiesole,Italy (Boundaries Adjusted) Archdiocese ofFirenze {Florence},Italy (Boundaries Adjusted) | Territory Added | ||
| 1918 | Prefecture Apostolic ofBetafó,Madagascar | Elevated | Vicariate Apostolic ofBetafó,Madagascar | Elevated |
| 1918 | Prefecture Apostolic ofWestern Nigeria {Nigeria Occidentale} | Elevated | Vicariate Apostolic ofWestern Nigeria {Nigeria Occidentale} | Elevated |
| 1938 | Diocese ofCoimbra,Portugal (Águeda, Anadia, Aveiro, Ílhavo, Oliveira do Bairrom, and Vagos) Diocese ofPorto,Portugal (Albergaria-a-Velha, Estarreja, and Murtosa) Diocese ofViseu,Portugal (Sever do Vouga) | Territory Lost | Diocese ofAveiro,Portugal | Restored |
| 1957 | Delegation toIndochina | Established | Delegation toThailand | Established |
| 1962 | Prefecture Apostolic ofLac Moero,Congo (Dem. Rep.) | Elevated | Diocese ofKilwa,Congo (Dem. Rep.) | Elevated |
| 1965 | Archdiocese ofSydney,Australia (Belmont, Lake Macquarie, Morisset, Swansea, and Toronto) | Territory Lost | Diocese ofMaitland,Australia | Territory Added |
| 1972 | Diocese ofMweka,Congo (Dem. Rep.) (Bena-Tshiadi) | Territory Lost | Archdiocese ofKananga,Congo (Dem. Rep.) | Territory Added |
| 1994 | Delegation toPacific Ocean | Established | Nunciature toTonga,Pacific (Oceania) | Established |
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