| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 59.5 | Appointed | Jean-Joseph Audemar † | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| 59.5 | Appointed | Jean-Joseph Audemar † | Titular Bishop of Adraa | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| 22.0 | Ordained Priest | Francisco de Paula Campo y Pérez † | Priest | Bishop of Comayagua, Honduras |
| 59.2 | Resigned | Teresio Maria Carlo Vittorio Ferrero della Marmora † | Bishop of Pinerolo, Italy | Cardinal, Bishop Emeritus of Saluzzo, Italy |
| 77.0 | Died | Istvan Gosztonyi † | Auxiliary Bishop of Esztergom, Hungary |
| Born | Paul Hachim † | | Archbishop of Alep [Beroea, Halab] (Maronite), Syria |
| 34.0 | Appointed | Denys Michel Hardaya † | Bishop of Alep [Beroea, Halab] (Syrian), Syria |
| 22.1 | Ordained Priest | Toussaint (Raffaele Sante) Casanelli d’Istria † | Priest | Bishop of Ajaccio, France |
| 63.0 | Died | Patrick Lambert, O.F.M. Ref. † | Vicar Apostolic Emeritus of Newfoundland, Canada |
| Confirmed | Jakiv (Jakub) Martusevyc (Martusiewicz) † | Bishop of Lutsk and Ostroh (Ukrainian), Ukraine | Archbishop of Polotsk (Połock)-Vitebsk (Ukrainian), Belarus |
| 24.3 | Ordained Priest | Mario Mattei † | Priest | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 61.4 | Resigned | Gaudenzio Giovanni Antonio Patrignani, O.F.M. Obs. † | Minister General of Order of Observant Friars Minor | Bishop of Ferentino, Italy |
| 40.0 | Ordained Priest | Nicolaus Rodrigues Pereira de Borja, C.M. † | Priest of Congregation of the Mission | Bishop-Elect of Macau, China |
| Appointed | [Ignatius George V Sayar] † | Archbishop of Alep [Beroea, Halab] (Jacobite), Syria | Patriarch of Antiochia {Antioch} (Syrian), Lebanon |
| Died | Giorgio Tuno † | Vicar Apostolic of Sofia e Plovdiv, Bulgaria |
| 25.2 | Ordained Priest | Edward Walsh † | Priest | Bishop of Ossory, Ireland |
| 25.4 | Ordained Priest | José Antonio Laureano de Zubiría y Escalante † | Priest | Bishop of Durango, México |
| 1 Jan | 84.8 | Died | Giuseppe Gregorio (Josip Grgur) Scotti † | Archbishop of Zadar (Zara), Croatia |
| 10 Jan | 75.6 | Died | Lorenzo Caleppi † | Cardinal, Apostolic Nuncio |
| 11 Jan | | Born | Filippo Campus Chessa † | | Bishop of Ampurias e Tempio, Italy |
| 12 Jan | 55.0 | Ordained Bishop | Paolo Leardi † | Titular Archbishop of Ephesus | Apostolic Nuncio to Austria |
| 56.2 | Ordained Bishop | Ramón Strauch y Vidal, O.F.M. Obs. † | Bishop of Vic, Spain |
| 13 Jan | 74.7 | Died | Giuseppe Maria (Angelo Pietro) Bressa, O.S.B. † | Bishop of Concordia (Sagittaria), Italy |
| 16 Jan | | Born | Ignazio Masotti † | | Cardinal, Prefect of the Congregation of Bishops and Regulars |
| 17 Jan | | Born | Giovanni Antonio Balma, O.M.V. † | | Archbishop of Cagliari, Italy |
| 70.0 | Died | Tomasz Ostaszewski † | Bishop of Płock, Poland |
| 19 Jan | 22.3 | Ordained Deacon | Johannes Zwijsen (Zwysen) † | Deacon | Bishop of ’s-Hertogenbosch (Bois-le-Duc), Netherlands |
| 21 Jan | 76.2 | Died | Joseph Christian Franz de Paula zu Hohenlohe-Waldenburg-Bartenstein † | Bishop of Wrocław (Breslau), Poland |
| 26 Jan | 23.0 | Ordained Priest | Anton Karner † | Priest | Bishop of Győr (Raab), Hungary |
| 27 Jan | 58.8 | Appointed | Jozafat Bułhak, O.S.B.M. † | Administrator of Kyiv-Halyč {Kiev} (Ukrainian), Ukraine | Archbishop |
| 1 Feb | 57.5 | Died | Juan Bautista Sacristán y Galiano † | Archbishop of Santafé en Nueva Granada, Colombia |
| 4 Feb | 63.7 | Died | László Kámánházy † | Bishop of Vác, Hungary |
| 6 Feb | 78.2 | Died | Gerardo Mele † | Bishop of Tropea, Italy |
| 9 Feb | | Born | Francesco Macarone-Palmieri † | | Bishop of Boiano, Italy |
| 10 Feb | 73.0 | Died | Karl Theodor von Dalberg † | Bishop of Konstanz {Constance}, Germany |
| 16 Feb | 89.2 | Died | Gaetano Maria Garrasi, O.E.S.A. † | Archbishop of Messina, Italy |
| 46.8 | Ordained Bishop | Vicente Román y Linares, O. Praem. † | Titular Bishop of Dausara | Auxiliary Bishop of Sevilla {Seville}, Spain |
| 48.0 | Ordained Bishop | Joachin (Gioacchino Domenico) Salvetti, O.F.M. Obs. † | Titular Bishop of Euroea in Epiro | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 17 Feb | | Born | Christoph Moufang † | | Vicar Apostolic Emeritus of Mainz, Germany |
| 71.4 | Died | Heinrich (Philipp Ernst) von Warnsdorf, O.S.B. † | Vicar Apostolic of Fulda, Germany |
| 19 Feb | | Born | Gabino Catalina del Amo † | | Bishop of Calahorra y La Calzada, Spain |
| 24 Feb | 22.1 | Ordained Priest | Giovanni Carlo Gentili † | Priest | Bishop Emeritus of Pesaro, Italy |
| Born | Gaetano Lironi † | | Bishop of Assisi, Italy |
| 25 Feb | | Born | Bartolomeo Pacca, Jr. † | | Cardinal, Priest of the Roman Curia - Other |
| 27 Feb | 42.3 | Appointed | Ignaz Heinrich von Wessenberg † | Vicar Apostolic of Konstanz {Constance}, Germany | Vicar Apostolic Emeritus |
| 1 Mar | | Born | Luiz Antônio dos Santos † | | Archbishop Emeritus of São Salvador da Bahia, Brazil |
| Born | Albin Dunajewski † | | Cardinal, Bishop of Kraków, Poland |
| 5 Mar | 23.9 | Ordained Deacon | Jozef Gaganecz † | Deacon of Mukachevo (Munkács) (Ruthenian), Ukraine | Bishop of Prešov (Prjašev) (Slovak), Slovakia |
| 7 Mar | | Born | Pierre-Louis-Marie Cortet † | | Bishop of Troyes, France |
| 8 Mar | 23.9 | Ordained Priest | Jozef Gaganecz † | Priest of Mukachevo (Munkács) (Ruthenian), Ukraine | Bishop of Prešov (Prjašev) (Slovak), Slovakia |
| 9 Mar | | Born | Giuseppe Milesi Pironi Ferretti † | | Cardinal, Cardinal-Bishop of Sabina |
| 10 Mar | | Born | Claude Marie Dubuis † | | Bishop Emeritus of Galveston, Texas, USA |
| Born | Patrick Neeson Lynch † | | Bishop of Charleston, South Carolina, USA |
| 15 Mar | 56.5 | Selected | Antonio Maria Trigona † | Archbishop of Messina, Italy | Archbishop Emeritus |
| 16 Mar | 68.7 | Appointed | Antonio Dugnani † | Cardinal, Prefect of the Apostolic Signatura |
| 19 Mar | 26.6 | Ordained Priest | José Domingo Armestar Espinoza de los Monteros † | Priest of Trujillo, Peru | Bishop |
| 22 Mar | 24.0 | Ordained Deacon | José Manuel Pasquel y Losada † | Deacon of Lima, Peru | Archbishop |
| 25 Mar | 89.0 | Died | Alfonso Airoldi † | Prelate of Santa Lucia del Mela, Italy |
| 28 Mar | 72.5 | Resigned | Giuseppe Capecelatro † | Archbishop of Taranto, Italy | Archbishop Emeritus |
| 29 Mar | | Born | Henryk Ludwik Plater † | | Auxiliary Bishop of Warszawa {Warsaw}, Poland |
| Apr | 37.2 | Incardinated | Franz Laurenz (Johannes Franz Ignatius) Mauermann, O. Cist. † | Priest of Saxonia (Saxony), Germany | Vicar Apostolic |
| 1 Apr | | Born | Pierre Rougeyron, S.M. † | | Vicar Apostolic Emeritus of Nouvelle-Calédonie (New Caledonia), Pacific (Oceania) |
| 2 Apr | | Born | José Manuel Orrego Pizarro † | | Bishop Emeritus of La Serena, Chile |
| 5 Apr | 29.4 | Ordained Priest | Jean-François Croizier † | Priest | Bishop of Rodez, France |
| 22.5 | Ordained Deacon | Nikolaus Franz Florentini † | Deacon of Chur, Switzerland | Bishop |
| 6 Apr | 47.2 | Appointed | Giacomo Giustiniani † | Apostolic Nuncio to Spain | Cardinal, Prefect of the Roman Curia - Other |
| Born | Paul-Matthieu de La Foata † | | Bishop of Ajaccio, France |
| 7 Apr | 22.5 | Ordained Priest | Nikolaus Franz Florentini † | Priest of Chur, Switzerland | Bishop |
| 8 Apr | 24.3 | Ordained Deacon | Emmanuele Francesco Barrutia y Croquer † | Deacon of Guatemala | Auxiliary Bishop |
| 67.0 | Resigned | Etienne-André-François de Paule de Fallot de Béaupré de Beaumont † | Bishop of Piacenza, Italy | Bishop Emeritus of Vaison, France |
| 51.4 | Ordained Bishop | Franciszek Borgiasz Mackiewicz † | Bishop of Kamyanets-Podilskyi (Kamieniec), Ukraine |
| 12 Apr | | Born | Guillaume-René Meignan † | | Cardinal, Archbishop of Tours, France |
| 14 Apr | 53.2 | Appointed | Francisco Albán Barreiro, O.P. † | Bishop of Nueva Segovia, Philippines |
| 50.6 | Appointed | Antonio Allué y Sesse † | Bishop of Gerona, Spain | Patriarch of West Indies, Spain |
| 50.0 | Appointed | José Ignacio de Arancibia y Hormaguei, O.F.M. † | Bishop of Linares o Nueva León, Nuevo León, México |
| 24.3 | Ordained Priest | Emmanuele Francesco Barrutia y Croquer † | Priest of Guatemala | Auxiliary Bishop |
| 58.2 | Appointed | Federico Bencivenni, O.F.M. Cap. † | Bishop of Bertinoro, Italy |
| 35.5 | Appointed | Ferdynand Maria von Chotek † | Auxiliary Bishop of Olomouc, Czechia | Archbishop |
| 35.5 | Appointed | Ferdynand Maria von Chotek † | Titular Bishop of Ptolemais in Thebaide | Archbishop of Olomouc, Czechia |
| 58.4 | Appointed | Luigi Ercolani † | Cardinal, Cardinal-Priest of San Marco |
| 52.5 | Appointed | Miguel Fernández Flórez, O.F.M. Obs. † | Auxiliary Bishop of Sevilla {Seville}, Spain |
| 47.2 | Appointed | Giacomo Giustiniani † | Titular Archbishop of Tyrus | Cardinal, Prefect of the Roman Curia - Other |
| 33.2 | Appointed | José Sebastian Goyeneche y Barreda † | Bishop of Arequipa, Peru | Archbishop of Lima, Peru |
| 40.9 | Confirmed | Joseph von Hohenzollern-Hechingen † | Bishop of Warmia (Ermland), Poland |
| 57.8 | Appointed | Bernardo Martínez y Ocejo, O.C.D. † | Bishop of Sonora, México |
| 36.5 | Appointed | Nicola Mattei Baldini † | Archbishop of Camerino, Italy | Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 36.5 | Appointed | Nicola Mattei Baldini † | Apostolic Administrator of Treia, Italy | Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 60.6 | Appointed | Pietro Paolo Mazzichi † | Bishop of Montalto (delle Marche), Italy |
| 53.2 | Appointed | Carlo Monti † | Bishop of Sarsina, Italy | Bishop of Cagli e Pergola, Italy |
| 66.0 | Appointed | Francesco Ridolfi † | Titular Bishop of Carystus |
| 58.2 | Appointed | Manuel Julián Rodríguez del Barranco † | Bishop of Comayagua, Honduras |
| 68.4 | Appointed | Juan Raimundo Santos Larumbe y Larrayoz † | Bishop of Tudela, Spain |
| 62.2 | Appointed | Nicola Serarcangeli † | Bishop of Fano, Italy |
| 55.5 | Appointed | Matthias Paul Steindl † | Auxiliary Bishop of Wien {Vienna}, Austria |
| 55.5 | Appointed | Matthias Paul Steindl † | Titular Bishop of Antaeopolis | Auxiliary Bishop of Wien {Vienna}, Austria |
| 39.4 | Appointed | Rafael Téllez, O.F.M. Cap. † | Bishop of Ceuta, Spain | Archbishop of Santiago de Compostela, Spain |
| 58.7 | Appointed | Pedro Valera y Jiménez † | Archbishop of Santo Domingo, Dominican Republic |
| 68.1 | Appointed | Michele de Vincenti † | Titular Bishop of Erythrum |
| 20 Apr | 58.2 | Ordained Bishop | Federico Bencivenni, O.F.M. Cap. † | Bishop of Bertinoro, Italy |
| 47.3 | Ordained Bishop | Giacomo Giustiniani † | Titular Archbishop of Tyrus | Cardinal, Prefect of the Roman Curia - Other |
| 36.6 | Ordained Bishop | Nicola Mattei Baldini † | Archbishop of Camerino, Italy | Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 66.0 | Ordained Bishop | Francesco Ridolfi † | Titular Bishop of Carystus |
| 62.2 | Ordained Bishop | Nicola Serarcangeli † | Bishop of Fano, Italy |
| 21 Apr | | Born | Luigi Vaccari, O.S.B. † | | Coadjutor Bishop of Nicotera e Tropea, Italy |
| 23 Apr | 80.3 | Died | László Kollonitz † | Archbishop of Kalocsa, Hungary |
| 24 Apr | 17.4 | Professed | Juan de la Cruz Calienes Olazabal, O.F.M. Obs. † | Member of Order of Observant Friars Minor | Bishop of Arequipa, Peru |
| 27 Apr | 53.3 | Ordained Bishop | Carlo Monti † | Bishop of Sarsina, Italy | Bishop of Cagli e Pergola, Italy |
| 28 Apr | 18.8 | Professed | Pier Giuseppe Vaggi, O.F.M. Cap. † | Member of Order of Friars Minor Capuchin | Bishop of Bobbio, Italy |
| 29 Apr | 75.9 | Died | Saverio Granata, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| 37.4 | Appointed | Maximos III Michel Mazloum † | Titular Archbishop of Myra | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 30 Apr | 63.7 | Died | Romoaldo Braschi-Onesti † | Cardinal, Archpriest of the Basilica di San Pietro in Vaticano {Saint Peter Basilica} |
| Born | Antonio La Scala † | | Bishop of San Severo, Italy |