| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Luigi Ambrosi † | Verona, Italy | Prefect of Hong Kong [Xianggang], China |
| Born | Giovanni Barcia † | Monreale, Italy | Titular Bishop of Croae |
| 23.3 | Ordained Priest | Mariano Brezmes y Arredondo † | Priest | Bishop of Astorga, Spain |
| 24.8 | Ordained Priest | João de França Castro e Moura, C.M. † | Priest | Bishop of Porto, Portugal |
| 25.7 | Ordained Priest | Paul Cullen † | Priest | Cardinal, Archbishop of Dublin, Ireland |
| 22.9 | Ordained Priest | Joseph Dixon † | Priest | Archbishop of Armagh, Ireland |
| 28.5 | Incardinated | Justo Donoso Vivanco † | Priest of Santiago de Chile | Bishop of La Serena, Chile |
| 77.3 | Appointed | Antonio Frosini † | Prefect of the Congregation for Indulgences and Relics | Cardinal, Prefect Emeritus |
| 17.9 | Professed | Enrico Gajo, O.F.M. Cap. † | Member of Order of Friars Minor Capuchin | Bishop of Bobbio, Italy |
| 57.4 | Died | Ignacy Giedrojć † | Coadjutor Bishop of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |
| 65.8 | Appointed | Luigi Pietro Grati, O.S.M. † | Apostolic Administrator of Terracina, Priverno e Sezze, Italy | Titular Bishop of Callinicum |
| 20.4 | Ordained Deacon | Bartolomé Manuel Herrera Vélez † | Deacon of Lima, Peru | Bishop of Arequipa, Peru |
| 24.6 | Ordained Priest | Francisco Landeira y Sevilla † | Priest | Bishop of Cartagena (en España) |
| 28.3 | Ordained Priest | Jean-Pierre Mabile † | Priest | Bishop of Versailles, France |
| 21.9 | Ordained Priest | Giuseppe-Maria Mucedola † | Priest | Bishop of Conversano, Italy |
| 43.0 | Died | Félix Calixto Miranda y Suárez de Figueroa † | Bishop of Cuenca, Ecuador |
| Born | José Ignacio Ordóñez † | Cuenca | Archbishop of Quito, Ecuador |
| 24.3 | Ordained Priest | Mariano Puigllat y Amigó † | Priest | Bishop of Lérida, Spain |
| 26.9 | Incardinated | Valentin von Riedel † | Priest of München und Freising {Munich}, Germany | Bishop of Regensburg, Germany |
| 3 Jan | 83.3 | Died | Orazio Magliola † | Bishop of Acerra, Italy |
| Born | Francesco Solano del Risco, O.F.M. † | Lima | Bishop Emeritus of Chachapoyas, Peru |
| 4 Jan | | Born | Angelo Balzano † | Castel di Sangro | Bishop Emeritus of Termoli, Italy |
| 7 Jan | 61.8 | Appointed | Giovanni Francesco Falzacappa † | Cardinal, Prefect of the Apostolic Signatura |
| 9 Jan | 90.8 | Died | Francesco Maria Fenzi † | Archbishop of Corfù, Greece | Archbishop Emeritus |
| 11 Jan | 62.2 | Ordained Bishop | Joachim-Jean-Xavier d’Isoard † | Cardinal, Archbishop of Auch, France |
| 46.3 | Ordained Bishop | Johann Michael Leonhard † | Titular Bishop of Alalis | Bishop of Austria, Military |
| 12 Jan | | Born | Edward Gilpin Bagshawe, C.O. † | London | Bishop Emeritus of Nottingham, England, Great Britain |
| 15 Jan | 81.3 | Died | Tadeusz Kundzicz † | Auxiliary Bishop of Vilnius, Lithuania |
| Born | John Leonard † | Dublin, Ireland | Vicar Apostolic of Cape of Good Hope, Western District {Capo di Buona Speranza, Distretto Occidentale}, South Africa |
| 16 Jan | | Born | Boghos Bédros (Paul Peter) XI Emmanuélian † | Telerpen, Turkey | Patriarch of Cilicia (Armenian), Lebanon |
| 73.0 | Died | Pietro Mola † | Bishop of Bergamo, Italy |
| 30.4 | Appointed | Costantino Patrizi Naro † | Apostolic Nuncio to Other | Cardinal, Secretary of the Congregation for Universal Inquisition |
| Born | Americo Ferreira dos Santos Silva † | Porto | Cardinal, Bishop of Porto, Portugal |
| 17 Jan | | Born | Augustus Maria Bernard Anthony John Gebhard Toebbe † | Meppen, Germany | Bishop of Covington, Kentucky, USA |
| 18 Jan | 40.9 | Ordained Bishop | Louis-François-Auguste de Rohan-Chabot † | Cardinal, Archbishop of Besançon, France |
| 19 Jan | | Born | Luigi Domenico Cenci, T.C. † | Loreto | Titular Bishop of Apollonia |
| 21 Jan | | Born | Paul Leopold Haffner † | Horb | Bishop of Mainz, Germany |
| Born | Giacinto Magliuolo † | Frignano Maggiore | Bishop of Acerra, Italy |
| 24 Jan | 63.6 | Selected | Emanuele Maria Bellorado, O.P. † | Bishop of Sant’Agata de’ Goti, Italy |
| 63.6 | Selected | Emanuele Maria Bellorado, O.P. † | Bishop of Acerra, Italy | Bishop of Sant’Agata de’ Goti, Italy |
| 68.1 | Selected | Zaccaria Boccardo, O.F.M. Cap. † | Bishop of Crotone (Cotrone), Italy |
| 46.7 | Selected | Leone Ciampa, O.F.M. † | Archbishop of Reggio Calabria, Italy | Archbishop of Sorrento, Italy |
| 57.8 | Selected | Matteo Franco, C.P.O. † | Bishop of Catanzaro, Italy |
| 64.0 | Selected | Vincenzo Rocca † | Bishop of Larino, Italy |
| 25 Jan | 63.7 | Ordained Bishop | Giovanni Antonio Benvenuti † | Cardinal, Bishop of Osimo e Cingoli, Italy |
| 26 Jan | 78.3 | Died | Giuseppe Manfrin Provedi † | Bishop of Chioggia, Italy |
| 28 Jan | 78.6 | Died | Omobono Offredi † | Bishop of Cremona, Italy |
| 29 Jan | 71.1 | Died | Pierre-François-Gabriel-Raymond-Ignace-Ferdinand de Bausset-Roquefort † | Archbishop of Aix (-Arles-Embrun), France |
| 72.3 | Died | Joachim Józef Grabowski † | Auxiliary Bishop of Mohilev, Belarus |
| 2 Feb | 23.6 | Ordained Priest | John Martin Henni † | Priest of Cincinnati, Ohio, USA | Archbishop of Milwaukee, Wisconsin, USA |
| 5 Feb | 74.7 | Died | Louis-Sylvestre de La Châtre † | Titular Bishop of Hemeria |
| 40.9 | Installed | Louis-François-Auguste de Rohan-Chabot † | Cardinal, Archbishop of Besançon, France |
| 6 Feb | | Born | Julien-François-Pierre Carmené † | Trébry, France | Bishop Emeritus of Martinique (Fort-de-France e Saint Pierre), Martinique, Antilles |
| 8 Feb | 59.2 | Ordained Bishop | Stanisław Kostka Choromański † | Titular Bishop of Adrasus | Archbishop of Warszawa {Warsaw}, Poland |
| Born | Vital-Justin Grandin, O.M.I. † | Saint-Pierre-la-Cour, France | Bishop of Saint Albert, Alberta, Canada |
| 9 Feb | | Born | Josef Jan Hais † | Budětic | Bishop of Hradec Králové, Czech Republic |
| 10 Feb | 68.5 | Died | Annibale Francesco Clemente Melchiore Girolamo Nicola della Genga † | Pope (Roma {Rome}, Italy) |
| 13 Feb | 75.6 | Died | Jakub Ignacy Dederko † | Bishop of Minsk, Belarus |
| Born | Edward Henry Howard † | Nottingham, Great Britain | Cardinal, Bishop of Frascati, Italy |
| 15 Feb | 53.0 | Ordained Bishop | Ignacy Ludwik Pawłowski † | Titular Bishop of Megara | Archbishop of Mohilev, Belarus |
| 18 Feb | 73.5 | Died | Giovanni Francesco Marazzani Visconti † | Cardinal, Priest of the Roman Curia - Other |
| 19 Feb | | Born | Johannes Fidelis Battaglia † | Präsanz | Bishop Emeritus of Chur, Switzerland |
| 72.2 | Died | Jean-Baptiste-François-Nicolas Millaux † | Bishop of Nevers, France |
| 24 Feb | 55.8 | Ordained Bishop | Ignacio Ribes Mayor † | Bishop of Calahorra y La Calzada, Spain | Archbishop of Burgos, Spain |
| 1 Mar | | Born | Antonius von Thoma † | Nymphenburg | Archbishop of München und Freising {Munich}, Germany |
| 3 Mar | 42.7 | Succeeded | Peter Augustine Baines, O.S.B. † | Vicar Apostolic of Western District, England, Great Britain |
| 72.0 | Died | Peter Bernardine Collingridge, O.F.M. † | Vicar Apostolic of Western District, England, Great Britain |
| 7 Mar | 67.6 | Died | Giuseppe Emilio Sommariva † | Bishop of Modena (e Nonantola), Italy |
| 8 Mar | 66.1 | Ordained Bishop | Jaime Fort y Puig † | Bishop of Barbastro, Spain |
| 10 Mar | | Born | Giuseppe Apollonio † | Venezia | Bishop of Treviso, Italy |
| Born | Antonio Ibáñez y Galiano † | Almansa | Bishop of Teruel (-Albarracín), Spain |
| 12 Mar | | Born | Juan de Dios Bosque † | Sorata d'Esquival | Bishop of La Paz, Bolivia |
| 14 Mar | | Born | Pierre-Hector Coullié (Couillié) † | Paris | Cardinal, Archbishop of Lyon (-Vienne), France |
| 24.6 | Ordained Priest | Antonio Dalena † | Priest | Bishop of Monopoli, Italy |
| 24.7 | Ordained Priest | Johann Theodor Laurent † | Priest of Liège, Belgium | Vicar Apostolic Emeritus of Luxembourg |
| 58.5 | Selected | Mateusz Lipski † | Bishop of Minsk, Belarus |
| 24.1 | Ordained Priest | Joseph-François-Clet Peschoud † | Priest | Bishop of Cahors, France |
| 28.1 | Ordained Priest | Louis Amadeus Rappe † | Priest of Arras, France | Bishop Emeritus of Cleveland, Ohio, USA |
| 24 Mar | | Born | Ercole Vincento Boffi † | Sezze | Bishop of Bagnoregio (Bagnorea), Italy |
| 16.0 | Professed | Mariano Cuartero y Medina, O.P. † | Member of Order of Friars Preachers | Bishop of Jaro, Philippines |
| 25 Mar | 46.3 | Installed | Giuseppe Grasser † | Bishop of Verona, Italy |
| 43.5 | Ordained Bishop | Daniel McDonnell † | Titular Bishop of Olympus (Olimpus) | Vicar Apostolic of Trinidad, Trinidad and Tobago, Antilles |
| 26 Mar | 61.1 | Selected | Godehard Joseph Osthaus † | Bishop of Hildesheim, Germany |
| 30 Mar | | Born | Luigi Pallotti † | Albano Laziale, Italy | Cardinal, Prefect of the Roman Curia - Other |
| 31 Mar | 78.5 | Appointed | Giuseppe Andrea Albani † | Secretary of the Secretariat of State | Cardinal, Librarian of the Vatican Library |
| 67.4 | Elected | Francesco Saverio Maria Felice Castiglioni † | Pope (Roma {Rome}, Italy) |
| 2 Apr | 87.6 | Died | Sébastien-Michel Amelot † | Bishop Emeritus of Vannes, France |
| 3 Apr | 75.7 | Died | Roch-Etienne de Vichy † | Bishop of Autun, France |
| 4 Apr | 23.5 | Ordained Priest | Lodovico Maria (dei Conti) Besi † | Priest | Vicar Apostolic Emeritus of Shantung {Scian-Ton} (Chan-tong), China |
| 70.1 | Appointed | Pietro Caprano † | Cardinal, Prefect of the Congregation of the Index |
| 24.2 | Ordained Priest | José Escolano y Fenoi † | Priest | Bishop of Jaén, Spain |
| 28.7 | Ordained Deacon | Angelo Ramazzotti † | Deacon | Patriarch of Venezia {Venice}, Italy |
| 23.0 | Ordained Priest | Domenico Ventura † | Priest | Archbishop of Amalfi, Italy |
| 23.6 | Ordained Priest | Valentino Vignone † | Priest of Boiano, Italy | Bishop of Diano-Teggiano, Italy |
| 5 Apr | 67.4 | Installed | Francesco Saverio Maria Felice Castiglioni † | Pope (Roma {Rome}, Italy) |
| 10 Apr | 53.5 | Selected | Michele Bombini † | Bishop of Cassano all’Jonio, Italy |
| 54.4 | Selected | Luigi Bovio, O.S.B. † | Bishop of Melfi e Rapolla, Italy |
| 64.6 | Selected | Bernhard Galura † | Bishop of Brixen {Bressanone}, Italy |
| 11 Apr | | Selected | Juan Nepomuceno Gómez Durán † | Bishop of Málaga, Spain |
| 13 Apr | 53.3 | Died | Lazzaro Vladagni Bianchi † | Bishop of Sapë, Albania |
| 15 Apr | | Born | Tullio Sericci † | Ancona | Bishop of Comacchio, Italy |
| 18 Apr | 27.1 | Ordained Priest | Giuseppe Cardoni † | Priest | Bishop Emeritus of Recanati e Loreto, Italy |
| Born | Giovanni Pietro Natoli † | Lipari | Bishop of Lipari, Italy |
| 19 Apr | 23.7 | Ordained Deacon | Ludwik Bartłomiej Brynk † | Deacon | Apostolic Administrator of Lutsk, Zhytomyr, and Kamyanets-Podilskyi (Łuck, Zytomierz, and Kamienec), Ukraine |
| 20 Apr | 65.9 | Died | José Antonio Joaquín Pérez Martínez y Robles † | Bishop of Tlaxcala, México |
| 30.7 | Ordained Priest | Jacobus Gerardus Schepers † | Priest | Vicar Apostolic of Dutch Guyana-Suriname, Suriname, Antilles |
| 21 Apr | 23.7 | Ordained Priest | Ludwik Bartłomiej Brynk † | Priest | Apostolic Administrator of Lutsk, Zhytomyr, and Kamyanets-Podilskyi (Łuck, Zytomierz, and Kamienec), Ukraine |
| 22 Apr | 65.0 | Selected | Pedro Rodriguez de Miranda, O. de M. † | Bishop of Jaca, Spain |
| 65.5 | Died | Francesco Felice Tiberi, C.O. † | Bishop of Valva e Sulmona, Italy |
| 23 Apr | | Born | Jorge Montes Solar † | Illapel | Auxiliary Bishop of Santiago de Chile |
| 26 Apr | 55.5 | Ordained Bishop | José Asensio Ocón y Toledo † | Bishop of Palencia, Spain | Bishop of Teruel, Spain |
| 54.2 | Selected | José Talayero Royo, O.P. † | Bishop of Albarracin, Spain |
| 27 Apr | 40.4 | Selected | Philippe-Marie-Thérèse-Guy Carron † | Bishop of Le Mans, France |
| 31.8 | Selected | Bénigne-Urbain-Jean-Marie du Trousset d’Héricourt † | Bishop of Autun, France |
| 67.8 | Selected | Louis-Charles-Jean-Baptiste Michel † | Bishop of Fréjus, France |
| 30 Apr | | Succeeded | James Browne † | Bishop of Kilmore, Ireland |
| Died | Fargal O’Reilly † | Bishop of Kilmore, Ireland |