| Date | From | To |
|---|
| unknown | | | Order of Imitation of Christ
| Founded |
| 13 Feb | | | Eparchy of Lungro degli Italo-Albanesi (Italo-Albanese), Italy
| Erected |
| 3 Apr | | | Vicariate Apostolic of Nouvelle-Anvers, Congo (Dem. Rep.)
| Erected |
| 18 Apr | Diocese of Haileybury, Ontario, Canada
| Territory Lost | Prefecture Apostolic of Northern Ontario (Ontario-Nord), Canada
| Erected |
| 30 Apr | | | Instituto Español de San Francisco Javier para Misiones Extranjeras
| Approbation |
| 22 May | Diocese of Santa Cruz de la Sierra, Bolivia
| Territory Lost | Vicariate Apostolic of Chaco, Bolivia
| Erected |
| 3 Jun | Archdiocese of Corfù, Greece
Diocese of Cefalonia e Zante, Greece
| United | Archdiocese of Corfù, Zante e Cefalonia, Greece
| United |
| 3 Jun | Diocese of Andros, Greece
Diocese of Mykonos, Greece
Archdiocese of Naxos, Greece
Diocese of Tinos, Greece
| United | Archdiocese of Naxos, Andros, Tinos e Mykonos, Greece
| United |
| 10 Sep | | | Diocese of Patna, India
| Erected |
| 4 Oct | Diocese of Amazonas, Brazil
| Territory Lost | Territorial Prelature of Acre e Purus, Brazil
| Erected |
| 19 Nov | Vicariate Apostolic of Batavia, Indonesia
| Territory Lost | Prefecture Apostolic of Celebes, Indonesia
| Erected |
| 26 Nov | | | Nunciature to Japan
| Erected |
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