| Date | From | To | ||
|---|---|---|---|---|
| unknown | St. Patrick’s Society for the Foreign Missions | Founded | ||
| 2 Jan | Diocese ofFulda,Germany (Towns of Borussici, Höringhausen, Eimelrod, Hemmighausen, and Deisfeld) | Territory Lost | Archdiocese ofPaderborn,Germany | Territory Added |
| 11 Jan | Prefecture Apostolic ofChaohsien [Zhaoxian],China | Elevated | Vicariate Apostolic ofChaohsien [Zhaoxian],China | Elevated |
| 18 Jan | Vicariate Apostolic ofQuinhon,Viet Nam (Attopen, Banmetuot, Kontum, and part of Quangnam) | Territory Lost | Vicariate Apostolic ofKontum,Viet Nam | Erected |
| 21 Jan | Vicariate Apostolic ofJehol [Jinzhou],China (Chihfeng, Kienping, Outan, Ningcheng, Weichang, and Kingpeng) | Territory Lost | Prefecture Apostolic ofChihfeng [Chifeng],China | Erected |
| 2 Feb | Vicariate Apostolic ofCosta d’Oro {Gold Coast},Ghana (Kingdom of Ashanti) | Territory Lost | Vicariate Apostolic ofKumasi,Ghana | Erected |
| 3 Feb | Vicariate Apostolic ofKhartoum,Sudan (Area North of Foumban) | Territory Lost | Vicariate Apostolic ofFoumban,Cameroon | Territory Added |
| 4 Feb | Vicariate Apostolic ofMoukden,China (Civil district East of Tung-Pien-Tao) | Territory Lost | Prefecture Apostolic ofFushun,China | Erected |
| 5 Feb | Diocese ofGuayana,Venezuela (Amazonas and La Urbana) | Territory Lost | Prefecture Apostolic ofAlto Orinoco,Venezuela | Erected |
| 5 Feb | Diocese ofBotucatu,Brazil (Parish of Itahy) | Territory Lost | Diocese ofSorocaba,Brazil | Territory Added |
| 5 Feb | Diocese ofSorocaba,Brazil (Parish of Bofate) | Territory Lost | Diocese ofBotucatu,Brazil | Territory Added |
| 22 Feb | Vicariate Apostolic ofDiégo-Suarez,Madagascar (Sambirano and Moromandia) | Territory Lost | Prefecture Apostolic ofIsole di Mayotta, Nossi-Bé e Comore,Madagascar | Territory Added |
| 22 Mar | Diocese ofTransilvania, Erdély, Siebenbürgen,Romania | Name Changed | Diocese ofAlba Iulia,Romania | Name Changed |
| 22 Mar | Prefecture Apostolic ofKatanga,Congo (Dem. Rep.) | Elevated | Vicariate Apostolic ofKatanga,Congo (Dem. Rep.) | Elevated |
| 22 Mar | Prefecture Apostolic ofCoquilhatville,Congo (Dem. Rep.) | Elevated | Vicariate Apostolic ofCoquilhatville,Congo (Dem. Rep.) | Elevated |
| 23 Mar | Vicariate Apostolic ofKweyang [Guiyang] (Kweiyang),China (Houping, Wuchwan, Yehho, Lungchuan, Tehkiang, Szenan, Yinkiang, Sungtao, Shihtsien, Kiangkow, Tungjen, Szehsien, Yuping , Shengki, Shiping, Tsingki, Chenyuan, Hwangping, Taikuing, Tsingkiang, Kiungshui, Tienchu, Kingping, Yungkiang, Liping, Yungtsung, ...) | Territory Lost | Mission "Sui Iuris" ofShihtsien [Shiqian],China | Erected |
| 26 Mar | Vicariate Apostolic ofJehol [Jinzhou],China (Loupei, Liutung, Liumsi, Tienshan, Kailou, and Soeitung) | Territory Lost | Prefecture Apostolic ofSzepingkai,China | Territory Added |
| 20 Apr | Vicariate Apostolic ofBatavia,Indonesia (Priangan and Cheribon) | Territory Lost | Prefecture Apostolic ofBandung,Indonesia | Erected |
| 22 Apr | Archdiocese ofKöln {Cologne},Germany (Eiberg in Essen) | Territory Lost | Archdiocese ofPaderborn,Germany | Territory Added |
| 25 Apr | Vicariate Apostolic ofBatavia,Indonesia (Pekalongan, Banjoemas, and Kedoe (except Tennangseng and Magalang)) | Territory Lost | Prefecture Apostolic ofPurwokerto,Indonesia | Erected |
| 2 May | Archeparchy ofPetra e Filadelfia (Melkite Greek),Jordan | Erected | ||
| 6 May | Missionaries of the Sacred Hearts of Jesus and Mary (Mallorca) | Approbation | ||
| 6 May | St. Joseph’s Society of the Sacred Heart | Decretum Laudis | ||
| 7 May | Vicariate Apostolic ofPhát Diêm,Viet Nam (Annamite province of Thanh-Hoa and to the Laotian province of San-Nua or Huaphanh Câu-Laos) | Territory Lost | Vicariate Apostolic ofThanh Hóa,Viet Nam | Erected |
| 27 May | Prefecture Apostolic ofDouala,Cameroon | Elevated | Vicariate Apostolic ofDouala,Cameroon | Elevated |
| 27 May | Prefecture Apostolic ofKavirondo,Kenya | Elevated | Vicariate Apostolic ofKisumu,Kenya | Elevated |
| 28 May | Vicariate Apostolic ofCosta d’Oro {Gold Coast},Ghana (Territory between Kumasi and Navrongo) | Territory Lost | Prefecture Apostolic ofNavrongo,Ghana | Territory Added |
| 1 Jun | Mission "Sui Iuris" ofHwangchow,China | Elevated | Prefecture Apostolic ofHwangchow,China | Elevated |
| 1 Jun | Mission "Sui Iuris" ofChangtien,China | Elevated | Prefecture Apostolic ofChangtien,China | Elevated |
| 1 Jun | Prefecture Apostolic ofSzepingkai,China | Elevated | Vicariate Apostolic ofSzepingkai [Siping],China | Elevated |
| 4 Jun | Vicariate Apostolic ofCaquetá,Colombia (Boundaries adjusted) | Territory Added | ||
| 11 Jun | Apostolic Exarchate ofIstanbul (Constantinople) (Greek),Turkey | Territory Lost | Apostolic Exarchate ofGreece (Greek) | Erected |
| 11 Jun | Eparchy ofTiruvalla (Syro-Malankara),India (Districts of Tiruvalla, Niranam, Kottayam, Muvattupuzha, and Kunnamkulam) | Erected | ||
| 11 Jun | Archeparchy ofTrivandrum (Syro-Malankara),India (Districts of Trivandrum, Kottarakkara, Adow, Pathanamthitta, Mavelikara, Kayamkulam, and Chengannur) | Erected | ||
| 17 Jun | Vicariate Apostolic ofSianfu,China (Chouchih, Shingping, Hushien, Wukung, Fufeng, and Meishien) | Territory Lost | Prefecture Apostolic ofChowchich [Zhouzhi],China | Erected |
| 17 Jun | Vicariate Apostolic ofLuanfu,China (Hungtung, Chaocheng, Fensi, Hohsien, Lingshih, Yunghwo, Sihsien, Taning, Puhsien, Lufeng, Siangling, Fowshan, and Antseh) | Territory Lost | Prefecture Apostolic ofHungtung [Hongdong],China | Erected |
| 17 Jun | Prefecture Apostolic ofShohchow,China | Elevated | Vicariate Apostolic ofShohchow [Shuoxian],China | Elevated |
| 17 Jun | Prefecture Apostolic ofTatungfu,China | Elevated | Vicariate Apostolic ofTatungfu,China | Elevated |
| 7 Jul | Archdiocese ofCartagena,Colombia (Atlántico) | Territory Lost | Diocese ofBarranquilla,Colombia | Erected |
| 7 Jul | Vicariate Apostolic ofLos Llanos de San Martín (Piani di San Martino),Colombia (Boundaries adjusted) | Territory Added | ||
| 15 Jul | Diocese ofCebu,Philippines (Siqujior island) Diocese ofJaro o Santa Elisabetta,Philippines (Negros island along with small islands to the East) | Territory Lost | Diocese ofBacolod,Philippines | Erected |
| 15 Jul | Diocese ofNueva Segovia,Philippines | Territory Lost | Prefecture Apostolic ofMountain Provinces (Montanosa),Philippines (Montana) | Erected |
| 18 Jul | Mission "Sui Iuris" ofBulawayo,Zimbabwe | Elevated | Prefecture Apostolic ofBulawayo,Zimbabwe | Elevated |
| 18 Jul | Diocese ofAllahabad,India (districts of Sagar, Damoh, Rewa, Siddhi, Shahdol, Satna, Panna, Chattarpur, and Tikamgarh) Diocese ofNagpur,India (districts of Jabalpur, Mandla, Narsinghpur and the tahsil of Laknadon) | Territory Lost | Prefecture Apostolic ofJubbulpore,India | Erected |
| 18 Jul | Prefecture Apostolic ofPadang,Indonesia | Elevated | Vicariate Apostolic ofPadang,Indonesia | Elevated |
| 18 Jul | Vicariate Apostolic ofTanganyika,Tanzania (Eastern part) | Territory Lost | Mission "Sui Iuris" ofTukuyu,Tanzania | Erected |
| 18 Jul | Vicariate Apostolic ofSapporo,Japan (Island of Karafuto or Sakhalin) | Territory Lost | Mission "Sui Iuris" ofKarafuto,Japan | Erected |
| 18 Jul | Vicariate Apostolic ofNouvelle-Anvers,Congo (Dem. Rep.) (Boundaries adjusted) Prefecture Apostolic ofUbanghi Belga {Belgian Ubanghi},Congo (Dem. Rep.) (Boundaries adjusted) | Territory Added | ||
| 18 Jul | Vicariate Apostolic ofTanganyika,Tanzania (Ngulu and Vgunâa and part of Vgansi) | Territory Lost | Vicariate Apostolic ofTabora,Tanzania | Territory Added |
| 18 Jul | Vicariate Apostolic ofBukoba,Tanzania Vicariate Apostolic ofTabora,Tanzania | Territory Lost | Vicariate Apostolic ofTanganyika,Tanzania (Kibondo) | Territory Added |
| 1 Aug | Diocese ofDubrovnik (Ragusa),Croatia (Lagosta island) Diocese ofKrk (Veglia),Croatia (Gherso, Lussino, and other smaller islands around Liburnian gulf) | Territory Lost | Archdiocese ofZadar (Zara),Croatia (Limited to area controlled by Italy) | Territory Added |
| 1 Aug | Archdiocese ofZadar (Zara),Croatia (no longer a Metropolitan) | Elevated | ||
| 1 Aug | Diocese ofKotor (Cattaro),Montenegro (from Zadar to Immediately Subject) | Metropolitan Changed | ||
| 1 Aug | Diocese ofHvar (-Brac e Vis),Croatia (from Zadar to Immediately Subject) | Metropolitan Changed | ||
| 1 Aug | Diocese ofDubrovnik (Ragusa),Croatia (from Zadar to Immediately Subject) | Metropolitan Changed | ||
| 1 Aug | Diocese ofŠibenik (Knin),Croatia (from Zadar to Immediately Subject) | Metropolitan Changed | ||
| 1 Aug | Diocese ofSplit-Makarska (Spalato-Macarska),Croatia (from Zadar to Immediately Subject) | Metropolitan Changed | ||
| 22 Aug | Society of Christ for Polish Immigrants | Founded | ||
| 24 Oct | Missionários da Boa Nova | Approbation | ||
| 11 Nov | Archdiocese ofMünchen und Freising {Munich},Germany (Territory of Petrus Hoeek) | Territory Lost | Diocese ofAugsburg,Germany | Territory Added |
| 15 Nov | Vicariate Apostolic ofSianfu,China (Fong-siang, Lungchow, Kiengyang, Linyn, Paoki, and Kishan) | Territory Lost | Prefecture Apostolic ofFengsiang [Fengxiang],China | Erected |
| 18 Nov | Diocese ofGoiás,Brazil | Elevated | Archdiocese ofGoiás,Brazil | Elevated |
| 18 Nov | Diocese ofPorto Nacional, Tocatins,Brazil (from Mariana to Goiás) | Metropolitan Changed | ||
| 18 Nov | Territorial Prelature ofSão José de Alto Tocantins,Brazil (from Mariana to Goiás) | Metropolitan Changed | ||
| 18 Nov | Territorial Prelature ofJataí,Brazil (from Mariana to Goiás) | Metropolitan Changed | ||
| 18 Nov | Territorial Prelature ofBananal,Brazil (from Mariana to Goiás) | Metropolitan Changed | ||
| 29 Nov | Vicariate Apostolic ofYükiang [Yujiang],China (Nangcheng, Tzuhi, Nanfeng, Lituan, and Kuanchang) | Territory Lost | Prefecture Apostolic ofKienchangfu,China | Erected |
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