| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Appointed | Matteo Aceto † | Bishop of Nusco, Italy |
| 28.0 | Ordained Priest | Joseph VI Audu † | Priest | Patriarch of Babylon {Babilonia} (Chaldean), Iraq |
| 25.3 | Ordained Priest | Juan José de Aycinena y Piñol † | Priest | Auxiliary Bishop of Guatemala |
| Born | Indalecio Barreto † | Somondoco | Bishop of Nueva Pamplona, Colombia |
| 55.7 | Appointed | Bernardino Bollati † | Bishop of Biella, Italy |
| Appointed | Francesco Buonomo † | Bishop of Gaeta, Italy |
| Appointed | Arcangelo Gabriele Cela † | Bishop of Anglona-Tursi, Italy |
| Born | Peter Francis Crinnon † | Cullen, Ireland | Bishop of Hamilton, Ontario, Canada |
| Appointed | João Inácio da Fonseca Manso † | Bishop of Leiria, Portugal |
| 55.1 | Appointed | Antonio Faà di Bruno † | Bishop of Asti, Italy |
| 53.4 | Incardinated | Bernhard Galura † | Priest of Brixen {Bressanone}, Italy | Bishop |
| 67.2 | Appointed | Pedro Gutiérrez de Coz † | Bishop of Ayacucho o Huamanga (Guamanga), Peru | Bishop of Puerto Rico (Porto Rico) |
| 68.0 | Appointed | Adrijan Holovnja (Holownia), O.S.B.M. † | Auxiliary Bishop of Minsk, Belarus | Auxiliary Bishop Emeritus |
| 54.0 | Appointed | Lev (Leon) Javorskyj (Jaworowski), O.S.B.M. † | Auxiliary Bishop of Foreign Diocese |
| 45.0 | Appointed | Józef Szczepan Koźmian † | Auxiliary Bishop of Lublin, Poland | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 45.0 | Appointed | Józef Szczepan Koźmian † | Titular Bishop of Carystus | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| Appointed | Baldassare Leone † | Bishop of Agrigento (Girgenti), Italy |
| 72.3 | Appointed | Orazio Magliola † | Bishop of Sant’Agata de’ Goti, Italy | Bishop of Acerra, Italy |
| Appointed | Giuseppe Crispino Mazzotti † | Bishop of Tivoli, Italy | Bishop of Cervia, Italy |
| Appointed | Verissimo Monteiro da Serra, C.M. † | Bishop of Peking [Beijing], China | Former Bishop-Elect |
| 23.2 | Ordained Priest | Paul Naudo † | Priest | Archbishop of Avignon, France |
| 54.0 | Appointed | Giuseppe Maria Pellicano † | Bishop of Gerace, Italy |
| 22.8 | Ordained Priest | Bartolomeo Carlo Romilli † | Priest | Archbishop of Milano {Milan}, Italy |
| Appointed | Ludovico Roselli † | Bishop of Gravina-Irsina, Italy |
| Died | Ludovico Roselli † | Bishop of Gravina-Irsina, Italy |
| Resigned | Carlo Sozzi † | Archbishop of Milano {Milan}, Italy | Archbishop Emeritus |
| 21.4 | Ordained Priest | Jozef Vibe(r) † | Priest | Auxiliary Bishop of Rožňava, Slovakia |
| Jan | 64.5 | Appointed | Gabriel Maria Gravina, O.S.B. † | Prelate of Santa Lucia del Mela, Italy |
| 6 Jan | 52.0 | Installed | Louis-Guillaume-Valentin Dubourg, P.S.S. † | Bishop of Louisiana and the Two Floridas (Saint Louis of New Orleans), USA | Archbishop of Besançon, France |
| 9 Jan | 61.3 | Died | José Maria de Melo, C.O. † | Bishop Emeritus of Faro {Algarve}, Portugal |
| Born | Tommaso Reggio † | Genova | Archbishop of Genova, Italy |
| 11 Jan | 50.8 | Ordained Bishop | José Ignacio de Arancibia y Hormaguei, O.F.M. † | Bishop of Linares o Nueva León, Nuevo León, México |
| 77.4 | Died | Joaquim de Santa Clara Brandão (Lopes), O.S.B. † | Archbishop of Évora, Portugal |
| 13 Jan | | Appointed | Aloisio Gandolfi, C.M. † | Vicar Apostolic of Alep [Beroea, Halab], Syria |
| 14 Jan | | Born | Hilarión Alcázar, O.P. † | Villatobas, Spain | Vicar Apostolic of Eastern Tonking {Tonkino Orientale}, Viêt Nam |
| 15 Jan | 75.0 | Died | Giovanni Francesco d’Alessandria † | Bishop of Catanzaro, Italy |
| 17 Jan | 85.2 | Died | Martin Takáts † | Auxiliary Bishop of Kalocsa, Hungary |
| 19 Jan | 81.7 | Died | Carlo Crivelli † | Cardinal, Official of the Roman Curia - Other |
| 26 Jan | 31.2 | Ordained Deacon | Ludwik Łętowski † | Deacon | Titular Bishop of Ioppe |
| 27 Jan | | Born | Jan Chryzostom Janiszenwski † | Pudliszki | Auxiliary Bishop of Gniezno-Poznań, Poland |
| 31.2 | Ordained Priest | Ludwik Łętowski † | Priest | Titular Bishop of Ioppe |
| 30 Jan | | Born | Franz de Paula Albert Eder, O.S.B. † | Hallein | Archbishop of Salzburg, Austria |
| 31 Jan | | Died | Richard O’Reilly † | Archbishop of Armagh, Ireland |
| Feb | 58.7 | Installed | Bernardo del Espíritu Santo Martínez y Ocejo, O.C.D. † | Bishop of Sonora, México |
| 1 Feb | 78.8 | Died | Wojciech Gorski † | Bishop of Kielce, Poland |
| 31.1 | Ordained Bishop | Jacques-Léonard Pérocheau, M.E.P. † | Titular Bishop of Maxula Prates | Vicar Apostolic of Northwestern Szechwan {Se-Ciuen Settentrionale-Occidentale}, China |
| 5 Feb | 72.2 | Selected | Matthäus Georg von Chandelle † | Bishop of Speyer, Germany |
| 72.2 | Selected | Franz Karl Joseph von Hohenlohe-Waldenburg-Schillingsfürst † | Bishop of Augsburg, Germany |
| 77.2 | Selected | Joseph von Stubenberg † | Archbishop of Bamberg, Germany |
| 8 Feb | 54.1 | Died | Luca Amici † | Bishop of Ferentino, Italy |
| 11 Feb | 92.4 | Died | José Francisco Miguel António de Mendonça Valdereis † | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 15 Feb | | Born | Giovanni Acquaviva, C.O. † | Tricarico | Bishop of Nusco, Italy |
| 59.6 | Ordained Bishop | Pedro Valera y Jiménez † | Archbishop of Santo Domingo, Dominican Republic |
| 16 Feb | 57.1 | Selected | Lothar Anselm von Gebsattel † | Archbishop of München und Freising {Munich}, Germany |
| 69.6 | Resigned | Joseph Jakob von Heckenstaller † | Vicar Apostolic of Freising, Germany | Vicar Apostolic Emeritus |
| 77.0 | Died | Vicente José Soto Valcárce † | Bishop of Valladolid, Spain |
| 18 Feb | 53.3 | Died | Joaquim da Souza Saraiva, C.M. † | Vicar Apostolic of Peking [Beijing], China |
| 23 Feb | | Appointed | Patrick MacNicholas † | Bishop of Achonry, Ireland |
| Born | Antonio Maria Pettinari, O.F.M. † | Fano | Archbishop Emeritus of Urbino, Italy |
| Mar | 35.0 | Appointed | Francesco Serra Casano † | Titular Archbishop of Nicaea | Cardinal, Archbishop of Capua, Italy |
| 1 Mar | 48.6 | Selected | Karl Kajetan von Gaisruck (Gaysruck) † | Cardinal, Archbishop of Milano {Milan}, Italy |
| 2 Mar | | Born | Ramón Camacho y García † | Etzatlán | Bishop of Querétaro, México |
| 3 Mar | 77.2 | Died | Gennaro Carelli † | Bishop of Conversano, Italy |
| 4 Mar | 23.4 | Ordained Priest | William Placid Morris, O.S.B. † | Priest of Order of Saint Benedict | Vicar Apostolic Emeritus of Cape of Good Hope, Western District {Capo di Buona Speranza, Distretto Occidentale}, South Africa |
| Born | Tobias Mullen † | Urney, Ireland | Bishop Emeritus of Erie, Pennsylvania, USA |
| 7 Mar | 30.8 | Ordained Priest | Antônio Ferreira Viçoso, C.M. † | Priest of Congregation of the Mission | Bishop of Mariana, Brazil |
| 27.6 | Ordained Priest | Anton Frenzel † | Priest of Wrocław (Breslau), Poland | Auxiliary Bishop of Warmia (Ermland), Poland |
| 9 Mar | | Born | Giorgio Schopper † | Pest | Bishop of Rožňava, Slovakia |
| 12 Mar | 22.9 | Ordained Priest | Adalbert Lidmansky † | Priest of Ceské Budĕjovice {Budweis}, Czech Republic | Bishop of Gurk, Austria |
| 35.1 | Ordained Bishop | Francesco Serra Casano † | Titular Archbishop of Nicaea | Cardinal, Archbishop of Capua, Italy |
| 14 Mar | | Appointed | Pier Camillo de Carolis † | Bishop of Città della Pieve, Italy |
| 16 Mar | 33.8 | Appointed | Alessandro d’Angennes † | Bishop of Alessandria (della Paglia), Italy | Archbishop of Vercelli, Italy |
| 69.0 | Appointed | Antonio Maria Doria Pamphilj † | Chamberlain (Camerlengo) of the College of Cardinals | Cardinal, Archpriest of the Basilica di Santa Maria Maggiore {Saint Mary Major Basilica} |
| 45.3 | Appointed | Giorgio Doria Pamphilj Landi † | Cardinal-Priest of S. Cecilia | Cardinal, Prefect of the Congregation of Rites |
| 64.7 | Appointed | Gabriel Maria Gravina, O.S.B. † | Titular Archbishop of Melitene | Prelate of Santa Lucia del Mela, Italy |
| 59.1 | Appointed | Diego Antonio Navarro Martín de Villodras † | Archbishop of La Plata o Charcas, Bolivia |
| 64.7 | Appointed | Giovanni-Antonio Niccola (Nicola) † | Bishop of Alba (Pompea), Italy |
| 61.2 | Appointed | Antonio Pérez Minayo † | Bishop of Almería, Spain |
| 47.6 | Appointed | Domingo de Silos Santiago Apollinario Moreno, O.S.B. † | Apostolic Administrator of Caracas, Santiago de Venezuela | Bishop of Cádiz, Spain |
| 47.6 | Appointed | Domingo de Silos Santiago Apollinario Moreno, O.S.B. † | Titular Bishop of Canatha | Bishop of Cádiz, Spain |
| Born | Kazimierz Józef Wnorowski † | Lenczyca | Bishop of Lublin, Poland |
| 17 Mar | | Born | Giuseppe Maria Maragioglio, O.F.M. Cap. † | Salemi | Bishop of Patti, Italy |
| 18 Mar | | Born | St. Antoine-Marie-Nicolas Daveluy, M.E.P. † | Amiens, France | Coadjutor Vicar Apostolic of Corea |
| 21 Mar | 23.0 | Ordained Priest | Ignaz Feigerle † | Priest of Olomouc, Czech Republic | Bishop of Sankt Pölten, Austria |
| 26.5 | Ordained Priest | Jean-François Ollivier, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam |
| 22 Mar | 85.0 | Died | Fabrizio Cimino, C.SS.R. † | Bishop of Oria, Italy |
| 23 Mar | 33.8 | Ordained Bishop | Alessandro d’Angennes † | Bishop of Alessandria (della Paglia), Italy | Archbishop of Vercelli, Italy |
| 24 Mar | 55.4 | Ordained Bishop | Antonio Faà di Bruno † | Bishop of Asti, Italy |
| 25 Mar | 65.1 | Appointed | Alessandro Tommasini † | Archbishop of Reggio Calabria, Italy |
| 28 Mar | 82.2 | Died | Pedro Benito Antonio Quevedo y Quintano † | Cardinal, Bishop of Orense, Spain |
| 29 Mar | 60.7 | Ordained Bishop | Jean-Joseph Audemar † | Titular Bishop of Adraa | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viêt Nam |
| 30 Mar | 33.9 | Appointed | Ivan (Jan) Snihurskyj (Snigurski) † | Bishop of Przemyśl (Ukrainian), Poland |
| 31 Mar | 64.0 | Died | Giuseppe Della Casa † | Bishop of Alatri, Italy |
| Apr | 32.3 | Ordained Priest | Domingo Antonio Riaño Martínez † | Priest | Bishop of Antioquía, Colombia |
| 2 Apr | | Born | Luigi Mariotti † | Maciano | Bishop of Monte Feltre, Italy |
| 3 Apr | | Born | José Manuel Orrego Pizarro † | La Ligua | Bishop Emeritus of La Serena, Chile |
| 5 Apr | 63.7 | Appointed | Francesco Maria de Luca † | Archbishop of Lanciano, Italy | Archbishop of Lanciano (e Ortona), Italy |
| 6 Apr | 53.4 | Appointed | Domenico Novi Ciavarria † | Bishop of Avellino-Frigento, Italy | Bishop of Avellino, Italy |
| 51.7 | Appointed | Eustachio Dentice, C.R. † | Archbishop of Manfredonia (e Vieste), Italy |
| 61.5 | Appointed | Silvestro Granito † | Bishop of Cava (de’ Tirreni), Italy | Bishop of Cava e Sarno, Italy |
| 77.7 | Appointed | Francesco Saverio Gualtieri † | Bishop of Caserta, Italy |
| 62.3 | Appointed | Francesco Guidobono Cavalchini † | Cardinal-Deacon of S. Maria in Aquiro | Cardinal, Priest of Roma {Rome}, Italy |
| 62.3 | Elevated to Cardinal | Francesco Guidobono Cavalchini † | Cardinal, Priest of Roma {Rome}, Italy |
| 81.3 | Appointed | Kasimir Johann Baptist von Häffelin † | Cardinal-Priest of S. Sabina | Cardinal, Cardinal-Priest of S. Anastasia |
| 81.3 | Elevated to Cardinal | Kasimir Johann Baptist von Häffelin † | Cardinal, Cardinal-Priest of S. Anastasia |
| 72.4 | Confirmed | Franz Karl Joseph von Hohenlohe-Waldenburg-Schillingsfürst † | Bishop of Augsburg, Germany |
| 37.8 | Appointed | Salvatore Lettieri † | Bishop of Castellaneta, Italy | Bishop of Nardò, Italy |
| Appointed | Domenico Narni Mancinelli † | Archbishop of Cosenza, Italy | Bishop of Caserta, Italy |
| 60.6 | Appointed | Girolano Manieri † | Bishop of L’Aquila, Italy |
| 72.3 | Appointed | Andrea Mansi † | Archbishop of Otranto, Italy |
| 68.3 | Appointed | Baldassare Mormile, C.R. † | Archbishop of Capua, Italy |
| Appointed | Andrea Portanova † | Bishop of Lucera, Italy |
| 54.8 | Appointed | Carlo Puoti † | Archbishop of Rossano, Italy | Bishop of Alife, Italy |
| Appointed | Domenico Russo † | Bishop of Ariano, Italy |
| 61.0 | Appointed | Fabrizio Sceberras Testaferrata † | Cardinal-Priest of S. Pudenziana | Cardinal, Bishop of Senigallia, Italy |
| 61.0 | Appointed | Fabrizio Sceberras Testaferrata † | Cardinal, Bishop of Senigallia, Italy |
| 61.0 | Elevated to Cardinal | Fabrizio Sceberras Testaferrata † | Cardinal, Bishop of Senigallia, Italy |
| 77.4 | Confirmed | Joseph von Stubenberg † | Archbishop of Bamberg, Germany |
| 54.5 | Appointed | Francesco Felice Tiberi, C.O. † | Bishop of Valva e Sulmona, Italy |
| Appointed | Bartolomeo Varrone † | Bishop of Sessa Aurunca, Italy |
| 9 Apr | | Born | Luigi Celestino Spelta, O.F.M. † | Piemonte, Italy | Vicar Apostolic of Hupeh {Hu-Pè}, China |
| 10 Apr | 53.3 | Died | Giuseppe Bonventura Berardi, O.F.M. Conv. † | Bishop of Foreign Diocese |
| 12 Apr | | Born | Michael Heiss † | Pfahldorf, Germany | Archbishop of Milwaukee, Wisconsin, USA |
| 47.3 | Ordained Bishop | Edward Kernan † | Coadjutor Bishop of Clogher, Ireland | Bishop |
| 66.6 | Appointed | Michele Spinelli, C.R. † | Archbishop of Sorrento, Italy |
| 54.5 | Ordained Bishop | Francesco Felice Tiberi, C.O. † | Bishop of Valva e Sulmona, Italy |
| 15 Apr | | Born | John MacEvilly † | Louisburgh | Archbishop of Tuam, Ireland |
| 19 Apr | 23.8 | Ordained Priest | Giuseppe Menditto † | Priest | Bishop Emeritus of Noto, Italy |
| 23 Apr | 97.2 | Died | Jean-Armand de Bessuéjouls Roquelaure † | Archbishop Emeritus of Mechelen, Belgium |
| 80.9 | Died | Alexandre da Sagrada Familia Ferreira da Silva, O.F.M. † | Bishop of Angra, Portugal |