| Year | From | To | ||
|---|---|---|---|---|
| 1237 | Diocese of Barcelona, Spain | Territory Lost | Diocese of Mallorca, Spain | Erected |
| 1614 | Diocese of São Salvador da Bahia de Todos os Santos, Brazil | Territory Lost | Territorial Prelature of Pernambuco, Brazil | Erected |
| 1826 | Territorial Prelature of Cuiabá, Brazil | Elevated | Diocese of Cuiabá, Brazil | Elevated |
| 1826 | Territorial Prelature of Goiás, Brazil | Elevated | Diocese of Goiás, Brazil | Elevated |
| 1890 | Diocese of Galveston, Texas, USA | Territory Lost | Diocese of Dallas, Texas, USA | Erected |
| 1925 | Vicariate Apostolic of Golfe St-Laurent, Québec, Canada (Northern part)
Vicariate Apostolic of Keewatin, Manitoba, Canada (Northern part) Vicariate Apostolic of Mackenzie, Northwest Territories, Canada (Eastern part) | Territory Lost | Prefecture Apostolic of Baie d’Hudson {Hudson Bay}, Manitoba, Canada | Erected |
| 1925 | Vicariate Apostolic of Upper Nile {Nilo Superiore}, Uganda | Territory Lost | Prefecture Apostolic of Kavirondo, Kenya | Erected |
| 1925 | Vicariate Apostolic of Brazzaville, Congo (Boundaries adjusted)
Prefecture Apostolic of Oubangui Chari, Central African Republic (Boundaries adjusted) | Territory Added | ||
| 1932 | Diocese of Cebu, Philippines (Siqujior island)
Diocese of Jaro o Santa Elisabetta, Philippines (Negros island along with small islands to the East) | Territory Lost | Diocese of Bacolod, Philippines | Erected |
| 1932 | Diocese of Nueva Segovia, Philippines | Territory Lost | Prefecture Apostolic of Mountain Provinces (Montanosa), Philippines (Montana) | Erected |
| 1939 | Archdiocese of Milano {Milan}, Italy (Paltanedo, Campore, Gottardo, and Toppi) | Territory Lost | Diocese of Como, Italy | Territory Added |
| 1939 | Diocese of Como, Italy (Valley of Cucciago from Molinetto to Bernardelli) | Territory Lost | Archdiocese of Milano {Milan}, Italy | Territory Added |
| 1948 | Diocese of Guayaquil, Ecuador | Territory Lost | Vicariate Apostolic of Los Ríos, Ecuador | Erected |
| 1949 | Eparchy of Minya {Ermopoli Maggiore; Minieh} (Coptic), Egypt (Mudiria Ghizeh (or Ghiza)) | Territory Lost | Eparchy of Alexandria {Alessandria} (Coptic), Egypt | Territory Added |
| 1950 | Diocese of Dacca, Bangladesh | Elevated | Archdiocese of Dacca, Bangladesh | Elevated |
| 1950 | Diocese of Karachi, Pakistan | Elevated | Archdiocese of Karachi, Pakistan | Elevated |
| 1950 | Diocese of Multan, Pakistan (from Delhi and Simla) | Metropolitan Changed | ||
| 1950 | Diocese of Lahore, Pakistan (from Delhi and Simla) | Metropolitan Changed | ||
| 1950 | Diocese of Rawalpindi, Pakistan (from Delhi and Simla) | Metropolitan Changed | ||
| 1950 | Diocese of Dinajpur, Bangladesh (from Calcutta) | Metropolitan Changed | ||
| 1950 | Diocese of Chittagong, Bangladesh (from Calcutta) | Metropolitan Changed | ||
| 1957 | Eparchy of Hassaké (Syrian), Syria | Erected | ||
| 1971 | Pontifical Council “Cor Unum”, Roman Curia | Established | ||
| 1978 | Sacerdoti Missionari della Regalità di Cristo | Approbation | ||
| 1995 | Nunciature to Eritrea | Established | ||
| 2008 | Prefecture Apostolic of Galápagos, Ecuador | Elevated | Vicariate Apostolic of Galápagos, Ecuador | Elevated |
| 2017 | Diocese of Arezzo-Cortona-Sansepolcro, Italy (San Giovanni Evangelista (in Terontola in Arezzo) and San Martino in Borghetto di Tuoro) | Territory Lost | Archdiocese of Perugia-Città della Pieve, Italy | Territory Added |
| 2021 | Archdiocese of Keewatin-Le Pas, Manitoba, Canada (Saint Bernadette in Sandy Lake, Ontario) | Territory Lost | Diocese of Thunder Bay, Ontario, Canada | Territory Added |
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