| Year | From | To | ||
|---|---|---|---|---|
| 1808 | Diocese of Baltimore, Maryland, USA | Territory Lost | Diocese of Boston, Massachusetts, USA (Massachusetts, New Hampshire, Rhode Island, Connecticut, and Vermont)
Diocese of Bardstown, Kentucky, USA (States of Kentucky, Tennessee, Ohio, and the Old Northwest Territory) Diocese of New York, New York, USA (State of New York plus Sussex, Bergen, Morris, Essex, Somerset, Middlesex, and Monmouth counties in New Jersey) Diocese of Philadelphia, Pennsylvania, USA (Pennsylvania, Delaware, and 7 counties of New Jersey) | Erected |
| 1808 | Diocese of Baltimore, Maryland, USA | Elevated | Archdiocese of Baltimore, Maryland, USA (Maryland, Virginia, District of Columbia, North and South Carolina, Alabama, and Mississippi) | Elevated |
| 1847 | Diocese of Chur-Sankt Gallen, Switzerland | Split | Diocese of Chur, Switzerland
Diocese of Sankt Gallen, Switzerland | Split |
| 1856 | Vicariate Apostolic of Houkouang, China | Territory Lost | Vicariate Apostolic of Hupeh {Hu-Pè}, China | Erected |
| 1856 | Vicariate Apostolic of Houkouang, China | Name Changed | Vicariate Apostolic of Hunan {Hu-Nan}, China | Name Changed |
| 1862 | Diocese of Saint-Boniface, Manitoba, Canada | Territory Lost | Vicariate Apostolic of Athabaska Mackenzie, Alberta, Canada | Erected |
| 1876 | Canons Regular of the Immaculate Conception | Decretum Laudis | ||
| 1911 | Vicariate Apostolic of Corea (Kiengsyàng-to and Tiyen-la-to) | Territory Lost | Vicariate Apostolic of Taiku, Korea (South) | Erected |
| 1911 | Vicariate Apostolic of Corea | Name Changed | Vicariate Apostolic of Seul, Korea (South) | Name Changed |
| 1911 | Vicariate Apostolic of Upper Congo {Congo Superiore}, Congo (Dem. Rep.) (Boundaries Changed)
Vicariate Apostolic of Nyassa, Malawi (Boundaries Changed) Vicariate Apostolic of Tanganyika, Tanzania (Boundaries Changed) Vicariate Apostolic of Unianyembé, Tanzania (Boundaries Changed) Vicariate Apostolic of Northern Victoria Nyanza {Victoria-Nyanza Settentrionale}, Uganda (Boundaries Changed) Vicariate Apostolic of Southern Victoria Nyanza {Victoria-Nyanza Meridionale}, Tanzania (Boundaries Changed) | Territory Added | ||
| 1920 | Diocese of Gerace, Italy | Name Changed | Diocese of Gerace (-Santa Maria di Polsi), Italy | Name Changed |
| 1929 | Vicariate Apostolic of Tabora, Tanzania (Part of Uha that is East and North of Malagarazi river)
Vicariate Apostolic of Urundi, Burundi (Bugufi) Vicariate Apostolic of Victoria-Nyanza, Tanzania (Civil province of Bukoba) | Territory Lost | Vicariate Apostolic of Bukoba, Tanzania | Erected |
| 1931 | Vicariate Apostolic of Norvegia e Spitzbergen (Finnmark, Tromsø, and Nordland (including the islands of Spitzbergen)) | Territory Lost | Mission "Sui Iuris" of Northern Norway {Norvegia Settentrionale} | Erected |
| 1935 | Vicariate Apostolic of Mariannhill, South Africa (Bizana, Flagstaff, Lusikisiki, Mount Ayliff, Mount Frere, Tabankulu, Mount Currie, and part of Matatiele) | Territory Lost | Prefecture Apostolic of Mount Currie, South Africa | Erected |
| 1935 | Prefecture Apostolic of Kroonstad, South Africa | Elevated | Vicariate Apostolic of Kroonstad, South Africa | Elevated |
| 1935 | Vicariate Apostolic of Yünnanfu, China (Chaotung, Tungchwan, Yentsing, Chensing, Sukiang, Hiliang, Yunshan, Kiadkia, Süanwei, TaTcwan, and Lutien UTbem) | Territory Lost | Prefecture Apostolic of Zhaotong [Chaotung], China | Erected |
| 1935 | Mission "Sui Iuris" of Tungchow [Tongzhou], China | Elevated | Prefecture Apostolic of Tongzhou [Tungchow], China | Elevated |
| 1951 | Delegation to Philippines | Elevated | Nunciature to Philippines | Elevated |
| 1954 | Diocese of Jericó, Colombia (Carmen de Atrato) | Territory Lost | Vicariate Apostolic of Quibdó, Colombia | Territory Added |
| 1957 | Diocese of Fort-Dauphin, Madagascar (Tulear, with Manombo and Sakaraha; Betioky with Tongobory and Benenitra; Ampanihy with Ejeda and Androka) | Territory Lost | Diocese of Tuléar, Madagascar | Erected |
| 1957 | Diocese of Fort-Dauphin, Madagascar (Farafangana with Ivohibe, Vondrozo, and Karianga; Ihosy with Ranohira and Lakora; Vangaindrano with Amparihy; from the southern Midongy with Befotaka; Vohipeno; and the territories of Fort Carnot and Manakara) | Territory Lost | Diocese of Farafangana, Madagascar | Erected |
| 1967 | Diocese of Brugge {Bruges}, Belgium (West Flanders and Hainaut) | Territory Lost | Diocese of Tournai {Doornik}, Belgium | Territory Added |
| 1974 | Diocese of Tulancingo, Hidalgo, México (Agua Fría, Paritepec, and Metlaltoyuca) | Territory Lost | Diocese of Tuxpan, Veracruz, México | Territory Added |
| 1974 | Diocese of Tuxpan, Veracruz, México (Zacualpan and Huayacocotla along with Texcatepec) | Territory Lost | Diocese of Tulancingo, Hidalgo, México | Territory Added |
| 1976 | Diocese of Governador Valadares, Minas Gerais, Brazil (São Manoel de Mutum and Nossa Senhora da Penha in Pocrane) | Territory Lost | Diocese of Caratinga, Minas Gerais, Brazil | Territory Added |
| 1976 | Diocese of Caratinga, Minas Gerais, Brazil (Engenheiro Caldas, Sobrália, and Fernandes Tourinho) | Territory Lost | Diocese of Governador Valadares, Minas Gerais, Brazil | Territory Added |
| 1986 | Archdiocese of Sydney, Australia (Baulkham Hills Shire, Blacktown City, the City of the Blue Mountains, Hawkesbury Shire, the Municipality of Holroyd, Parramatta City, Penrith City, and parts of Wollondilly and Liverpool) | Territory Lost | Diocese of Parramatta, Australia | Erected |
| 1986 | Archdiocese of Sydney, Australia (Northern Beaches, North Shore, and Central Coast) | Territory Lost | Diocese of Broken Bay, Australia | Erected |
| 1988 | Diocese of Wankie, Zimbabwe | Name Changed | Diocese of Hwange, Zimbabwe | Name Changed |
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