| Date | Age | Event | Bishop | Title | Current Title | 
|---|
| 1 Apr |  | Born | Conrad Gröber † |  | Archbishop of Freiburg im Breisgau, Germany | 
| 2 Apr | 79.7 | Died | Juan Francisco Escalante y Moreno † | Auxiliary Bishop of Sonora, México | 
|  | Born | Adolfo Luigi Pagani † |  | Bishop of Como, Italy | 
| 4 Apr |  | Born | Alois Scheiwiler † |  | Bishop of Sankt Gallen, Switzerland | 
| 6 Apr | 66.3 | Died | Napoléon François Libois, M.E.P. † | Prefect Emeritus of Kouangtong (Kwangtung, Guangdong), China | 
| 7 Apr | 23.8 | Ordained Priest | Ignacio Ibáñez, O.P. † | Priest of Order of Friars Preachers | Vicar Apostolic of Amoy, China | 
| 12 Apr | 23.5 | Ordained Priest | Filippo Camassei † | Priest of Roma {Rome}, Italy | Cardinal, Patriarch Emeritus of Jerusalem {Gerusalemme}, Palestine | 
| 14 Apr | 35.0 | Ordained Bishop | Joseph Gregory Dwenger, C.Pp.S. † | Bishop of Fort Wayne, Indiana, USA | 
| 47.5 | Ordained Bishop | Richard Gilmour † | Bishop of Cleveland, Ohio, USA | 
| 48.4 | Ordained Bishop | Arnold Ipolyi-Stummer † | Bishop of Banská Bystrica, Slovakia | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania | 
| 47.8 | Ordained Bishop | Federico Mascaretti, O. Carm. † | Bishop of Susa, Italy | Bishop Emeritus | 
| 52.5 | Ordained Bishop | Diego Marongiu Delrio † | Archbishop of Sassari, Italy | 
|  | Born | Louis-Nestor Renault, M.E.P. † |  | Vicar Apostolic of Suifu [Yibin], China | 
| 41.1 | Ordained Bishop | Patrick John Ryan † | Titular Archbishop of Tricomia | Archbishop of Philadelphia, Pennsylvania, USA | 
| 15 Apr |  | Born | Joseph-Fructueux Bourgain, M.E.P. † |  | Vicar Apostolic of Ningyüanfu, China | 
| 17 Apr | 45.1 | Installed | Giuseppe Guarino † | Archbishop of Siracusa, Italy | Cardinal, Archbishop of Messina, Italy | 
| 18 Apr | 40.7 | Converted | Alfred Allen Paul Curtis † | Bishop Emeritus of Wilmington, Delaware, USA | 
| 21 Apr | 23.6 | Ordained Priest | Andrea Elia Celebian † | Priest | Bishop of Amida (Diarbekir) (Armenian), Turkey | 
| 43.9 | Ordained Bishop | Francis McNeirny † | Titular Bishop of Rhesaina | Bishop of Albany, New York, USA | 
| 22 Apr | 76.9 | Died | Mellon Jolly † | Archbishop Emeritus of Sens (-Auxerre), France | 
| 23 Apr |  | Born | Kevork (Georges) Kortikian (Kurdighian) † |  | Archbishop of Alep [Beroea, Halab] (Armenian), Syria | 
| 25 Apr |  | Born | Francesco Canessa † |  | Auxiliary Bishop of Genova, Italy | 
| 58.3 | Died | Joseph Feßler (Fessler) † | Bishop of Sankt Pölten, Austria | 
| 28 Apr | 44.9 | Ordained Bishop | Thomas Francis Hendricken † | Bishop of Providence, Rhode Island, USA | 
| 56.7 | Ordained Bishop | João Perairo (Pereira) Botelho do Amaral y Pimentel † | Bishop of Angra, Portugal | 
| 30 Apr |  | Born | Luigi Barlassina † |  | Patriarch of Jerusalem {Gerusalemme}, Palestine | 
| 1 May | 52.3 | Ordained Bishop | Henri Monnier † | Titular Bishop of Lydda | Auxiliary Bishop of Cambrai, France | 
| 5 May |  | Born | Georges-François-Xavier-Marie Grente † |  | Cardinal, Bishop of Le Mans, France | 
| 27.3 | Ordained Priest | Étienne-Jean Kaynaia † | Priest | Bishop of Zaku (Chaldean), Iraq | 
| 54.9 | Ordained Bishop | Edgar Philip Prindle Wadhams † | Bishop of Ogdensburg, New York, USA | 
| 6 May | 53.0 | Appointed | Pietro Cappellari † | Bishop of Concordia (Sagittaria), Italy | Bishop Emeritus | 
| 53.9 | Appointed | Francesco Converti, O.F.M. Obs. † | Archbishop of Reggio Calabria, Italy | Archbishop Emeritus | 
| 47.8 | Confirmed | Victor-Jean-François-Paulin Delannoy † | Bishop of Saint-Denis-de-La Réunion | Bishop of Aire et Dax, France | 
| 38.1 | Appointed | Casimiro Forlani † | Auxiliary Bishop of Split-Makarska (Spalato-Macarska), Croatia | Bishop of Kotor (Cattaro), Montenegro | 
| 38.1 | Appointed | Casimiro Forlani † | Titular Bishop of Comana Armeniae | Bishop of Kotor (Cattaro), Montenegro | 
| 61.8 | Confirmed | François-André-Xavier de Gaffory † | Bishop of Ajaccio, France | 
| 60.6 | Appointed | Domenico Guadalupi † | Archbishop of Salerno (-Acerno), Italy | Archbishop Emeritus | 
| 38.6 | Appointed | Giuseppe Maria delli Guidelli Guidi † | Archbishop of Modena (e Nonantola), Italy | Archbishop Emeritus | 
| 53.0 | Appointed | Jerzy Iwaszkiewicz † | Auxiliary Bishop of Mohilev, Belarus | 
| 53.0 | Appointed | Jerzy Iwaszkiewicz † | Titular Bishop of Anthedon | Auxiliary Bishop of Mohilev, Belarus | 
| 44.7 | Appointed | Valerio Laspro † | Bishop of Lecce, Italy | Archbishop of Salerno (-Acerno), Italy | 
| 65.1 | Appointed | Rambaldo Magagnini † | Bishop of Jesi, Italy | 
| 49.3 | Appointed | Francesco Saverio Mangeruva † | Bishop of Gerace, Italy | 
| 57.7 | Appointed | János Pauer † | Auxiliary Bishop of Székesfehérvár (Albareale), Hungary | Bishop | 
| 57.7 | Appointed | János Pauer † | Titular Bishop of Olympus (Olimpus) | Bishop of Székesfehérvár (Albareale), Hungary | 
| 48.5 | Appointed | Alessandro de Risio, C.Ss.R. † | Archbishop of Santa Severina, Italy | Archbishop Emeritus | 
| 53.1 | Confirmed | Joseph-Jean-Louis Robert † | Bishop of Constantine (-Hippone), Algeria | Bishop of Marseille, France | 
| 47.4 | Appointed | Vincenzo Salvatore † | Bishop of Gravina e Irsina (Montepeloso), Italy | 
| 54.1 | Confirmed | Juraj Schopper † | Bishop of Rožňava, Slovakia | 
| 48.8 | Appointed | Giovanni Battista Alessio Tommasi † | Bishop of Massa Carrara, Italy | 
| 9 May | 60.6 | Ordained Bishop | Domenico Guadalupi † | Archbishop of Salerno (-Acerno), Italy | Archbishop Emeritus | 
| 49.3 | Ordained Bishop | Francesco Saverio Mangeruva † | Bishop of Gerace, Italy | 
| 48.6 | Ordained Bishop | Alessandro de Risio, C.Ss.R. † | Archbishop of Santa Severina, Italy | Archbishop Emeritus | 
| 48.8 | Ordained Bishop | Giovanni Battista Alessio Tommasi † | Bishop of Massa Carrara, Italy | 
| 10 May |  | Born | Edward Joseph Byrne † |  | Archbishop of Dublin, Ireland | 
| 12 May | 39.3 | Ordained Bishop | Ezechias Banci, O.F.M. Ref. † | Titular Bishop of Halicarnassus | Vicar Apostolic of Northwestern Hupeh {Hu-Pè Occiduo-Settentrionale}, China | 
| 38.7 | Ordained Bishop | Giuseppe Maria delli Guidelli Guidi † | Archbishop of Modena (e Nonantola), Italy | Archbishop Emeritus | 
| 13 May |  | Born | Constantin Daems, C.I.C.M. † |  | Superior General of Congregation of the Immaculate Heart of Mary | 
| 82.4 | Died | Leonardo Todisco Grande † | Bishop of Ascoli Satriano e Cerignola, Italy | 
| 14 May |  | Born | Elia Dalla Costa † |  | Cardinal, Archbishop of Firenze {Florence}, Italy | 
| 47.9 | Died | Athanasius Eduard Zuber, O.F.M. Cap. † | Vicar Apostolic Emeritus of Patna, India | 
| 18 May | 30.3 | Appointed | Gregorio Giorgio Sciahin † | Archbishop of Homs (-Hama-Nabk) (Syrian), Syria | Archbishop Emeritus | 
| 19 May | 41.5 | Ordained Bishop | Manuel Correia de Bastos Pina † | Bishop of Coimbra, Portugal | 
| 42.3 | Ordained Bishop | Paolo Carnevali (Carnevale), O.F.M. Obs. † | Titular Bishop of Maximianopolis in Arabia | Coadjutor Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China | 
|  | Born | Pasquale Gioia, C.R.S. † |  | Bishop of Molfetta, Giovinazzo e Terlizzi, Italy | 
| 30.3 | Ordained Bishop | Gregorio Giorgio Sciahin † | Archbishop of Homs (-Hama-Nabk) (Syrian), Syria | Archbishop Emeritus | 
| 21 May |  | Born | Charles Guérin † |  | Prefect of Ghardaïa, Algeria | 
| 22 May | 45.6 | Selected | Lino Deodato Rodrigues de Carvalho † | Bishop of São Paulo, Brazil | 
| 23 May | 55.9 | Selected | Bonifaz (Daniel) von Haneberg, O.S.B. † | Bishop of Speyer, Germany | 
| 24 May |  | Born | Emilio Juan Francisco Lissón y Chávez, C.M. † |  | Archbishop Emeritus of Lima, Peru | 
| 25 May | 22.6 | Ordained Priest | Giovanni Battista Boracchia † | Priest | Bishop of Massa Marittima, Italy | 
| 25.1 | Ordained Priest | Jean-Marie Clerc, M.S.F.S. † | Priest of Missionaries of St. Francis de Sales d’Annecy | Bishop of Vizagapatnam, India | 
| 24.3 | Ordained Priest | François-Marie-Joseph Delamaire † | Priest | Archbishop of Cambrai, France | 
| 24.3 | Ordained Priest | Antonio Tomas da Silva Leitão e Castro † | Priest | Bishop of Lamego, Portugal | 
| 23.1 | Ordained Priest | Augusto Eduardo Nunes † | Priest | Archbishop of Évora, Portugal | 
| 23.4 | Ordained Priest | Louis-Hippolyte-Aristide Raguit, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Liaotung and Manchuria, China | 
| 23.3 | Ordained Priest | Joseph Rumeau † | Priest | Bishop of Angers, France | 
| 24.1 | Ordained Priest | Juan Manuel Sanz y Saravia † | Priest of Sevilla {Seville}, Spain | Bishop of Jaén, Spain | 
| 23.2 | Ordained Priest | Juan José Solís y Fernández † | Priest | Bishop of Mondoñedo, Spain | 
| 22.9 | Ordained Deacon | Jerónimo Thomé da Silva † | Deacon of Olinda, Brazil | Archbishop of São Salvador da Bahia, Brazil | 
| 26.3 | Ordained Priest | Antonio Sebastião Valente † | Priest | Patriarch of East Indies, India | 
| 26 May | 41.1 | Appointed | St. Daniele Comboni, F.S.C.J. † | Pro-Vicar Apostolic of Central Africa {Africa Centrale}, Sudan | Vicar Apostolic | 
| 54.0 | Ordained Bishop | Francesco Converti, O.F.M. Obs. † | Archbishop of Reggio Calabria, Italy | Archbishop Emeritus | 
| 35.4 | Ordained Bishop | Jules Lepley, M.E.P. † | Titular Bishop of Gabala | Vicar Apostolic Emeritus of Southern Szechwan {Se-Ciuen Meridionale}, China | 
| 65.2 | Ordained Bishop | Rambaldo Magagnini † | Bishop of Jesi, Italy | 
| 36.3 | Ordained Priest | Louis-André Navarre, M.S.C. † | Priest of Missionaries of the Sacred Heart of Jesus | Vicar Apostolic Emeritus of New Guinea | 
| 47.4 | Ordained Bishop | Vincenzo Salvatore † | Bishop of Gravina e Irsina (Montepeloso), Italy | 
| 27 May | 30.0 | Entered | Jean-Baptiste-Frézal Charbonnier, M. Afr. † | Priest of Missionaries of Africa (White Fathers) | Vicar Apostolic of Tanganyika, Tanzania | 
| 28 May | 51.7 | Resigned | Franz Adolf Namszanowski † | Vicar Apostolic of Germany, Military | Vicar Apostolic Emeritus | 
| 2 Jun | 62.6 | Died | Philippe-Joseph Viard, S.M. † | Bishop of Wellington (Port Nicholson), New Zealand | 
| 3 Jun | 73.1 | Died | Guerr’Antonio Boscarini † | Bishop of Urbania e Sant’Angelo in Vado, Italy | 
| 4 Jun | 58.5 | Appointed | Manuel Teodoro del Valle Seoane † | Archbishop of Lima, Peru | Archbishop Emeritus | 
| 24.3 | Ordained Priest | José López Mendoza y García, O.E.S.A. † | Priest of Order of Hermits of St. Augustine | Bishop of Pamplona, Spain | 
| 5 Jun |  | Born | Johann Baptist Schauer † |  | Auxiliary Bishop of München und Freising {Munich}, Germany | 
| 6 Jun |  | Born | Felipe Joaquín Oláiz y Zabalza, O.F.M. Cap. † |  | Vicar Apostolic Emeritus of Guam, Pacific (Oceania) | 
| 7 Jun | 42.7 | Appointed | Evangelista Boni, O.F.M. Cap. † | Bishop of Cefalonia e Zante, Greece | Archbishop of Corfù, Greece | 
| 8 Jun |  | Born | Francesco Morano † |  | Cardinal, Cardinal-Deacon of Santi Cosma e Damiano | 
| 10 Jun | 48.5 | Ordained Bishop | Nilo Isvoroff † | Bishop | Archbishop Emeritus | 
| 11 Jun | 61.4 | Ceased | Adamo Adami, O.S.B. † | Minister General of Order of Saint Benedict | 
| 15 Jun | 23.8 | Ordained Priest | Apolinary Wnukowski † | Priest | Archbishop of Mohilev, Belarus | 
| 17 Jun |  | Born | Bonaventura Cerretti † |  | Cardinal, Prefect of the Apostolic Signatura | 
| 21 Jun | 56.3 | Died | Manuel del Conde y Blanco † | Bishop of San Luis Potosí, México | 
| 22 Jun | 50.0 | Died | Antonio Luis Jordá y Soler † | Bishop of Vic, Spain | 
| 23 Jun | 53.1 | Ordained Bishop | Pietro Cappellari † | Bishop of Concordia (Sagittaria), Italy | Bishop Emeritus | 
| 45.9 | Ordained Bishop | Frantisek Alojzy Zottmann † | Bishop of Tiraspol, Moldova | Bishop Emeritus | 
| 25 Jun | 43.3 | Appointed | Edward Henry Howard of Norfolk † | Archbishop (Personal Title), Auxiliary of Frascati, Italy | Cardinal, Cardinal-Bishop of Frascati | 
| 43.3 | Appointed | Edward Henry Howard of Norfolk † | Titular Archbishop of Neocaesarea in Ponto | Cardinal, Cardinal-Bishop of Frascati | 
| 26 Jun | 24.2 | Ordained Deacon | Bolesław Hieronim Kłopotowski † | Deacon | Archbishop of Mohilev, Belarus | 
|  | Born | Giuseppe Nogara † |  | Archbishop of Udine, Italy | 
| 27 Jun |  | Born | Pierre-Louis Perrichon, M.E.P. † |  | Coadjutor Bishop of Malacca, Singapore | 
|  | Born | Giovanni Rosi † |  | Bishop of Montefiascone, Italy | 
| 28 Jun |  | Born | Eduardo José Herberhold, O.F.M. † |  | Bishop of Ilhéus, Bahia, Brazil | 
| 29 Jun |  | Born | Emmanuel John Bidwell † |  | Auxiliary Bishop of Westminster, England, Great Britain | 
| 26.8 | Ordained Priest | Alois Hartl † | Priest of München und Freising {Munich}, Germany | Auxiliary Bishop | 
| 51.6 | Ordained Bishop | François-Eugène Lions, M.E.P. † | Titular Bishop of Basilinopolis | Vicar Apostolic of Kuiceu (Kweichow), China | 
| 57.9 | Ordained Bishop | János Pauer † | Titular Bishop of Olympus (Olimpus) | Bishop of Székesfehérvár (Albareale), Hungary | 
| 23.6 | Ordained Priest | Stanislas-Arthur-Xavier Touchet † | Priest of Besançon, France | Cardinal, Bishop of Orléans, France | 
| 30 Jun | 90.9 | Died | Cirilo de Alameda y Brea, O.F.M. Obs. † | Cardinal, Archbishop of Toledo, Spain | 
| 43.3 | Ordained Bishop | Edward Henry Howard of Norfolk † | Titular Archbishop of Neocaesarea in Ponto | Cardinal, Cardinal-Bishop of Frascati | 
| 53.1 | Ordained Bishop | Jerzy Iwaszkiewicz † | Titular Bishop of Anthedon | Auxiliary Bishop of Mohilev, Belarus |