| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Nicholas Joseph Archdeacon † | Cork | Bishop of Kilmacduagh, Ireland |
| 66.5 | Died | José Dantas Barbosa † | Auxiliary Bishop of Lisboa {Lisbon}, Portugal |
| Born | Anton El-Khazen (Gazeno) † | Daraun | Bishop of Baalbek (Maronite), Lebanon |
| 22.5 | Ordained Priest | Viktor Franz Anton von Glutz-Ruchti † | Priest of Lausanne, Switzerland | Coadjutor Bishop of Basel, Switzerland |
| 50.5 | Ordained Bishop | Karl Johann von Herberstein † | Titular Bishop of Myndus | Bishop of Ljubljana, Slovenia |
| 74.0 | Died | Emmanuel López de Espinosa † | Bishop of Paraguay |
| Born | Kyran Marum † | | Bishop of Ossory, Ireland |
| Appointed | Corrado Deodato Moncada † | Archbishop of Messina, Italy |
| 33.0 | Ordained Priest | James Louis O’Donel, O.F.M. † | Priest of Order of Friars Minor | Vicar Apostolic Emeritus of Newfoundland, Canada |
| 23.0 | Ordained Priest | Tomasz Ostaszewski † | Priest of Society of Jesus | Bishop of Płock, Poland |
| 76.0 | Died | Alexander Papafava † | Titular Bishop of Famagusta |
| 21.4 | Ordained Priest | Ján Révay † | Priest | Bishop of Spiš, Slovakia |
| 43.7 | Died | Antonius Urbański † | Auxiliary Bishop of Przemyśl, Poland |
| 7 Jan | 45.0 | Died | Francesco Brancia † | Archbishop of Chieti, Italy |
| 8 Jan | 61.2 | Died | Ján Terlanday † | Bishop of the Titular See |
| 14 Jan | 67.2 | Ordained Bishop | Alsonso Francisco Arango † | Bishop of Orense, Spain |
| 42.7 | Ordained Bishop | Juan Llano Ponte † | Titular Bishop of Lares | Bishop of Oviedo, Spain |
| 17 Jan | 68.0 | Died | Paulo de Carvalho de Mendoça † | Cardinal, |
| 66.7 | Resigned | Juan Portugal de la Puebla † | Bishop of Mantova, Italy | Titular Patriarch of Constantinople |
| 21 Jan | 62.5 | Ordained Bishop | Joaquín de Eleta, O.F.M. † | Titular Archbishop of Thebae | Bishop of Osma, Spain |
| 44.7 | Ordained Bishop | Johann Heinrich von Kerens, S.J. † | Bishop of Roermond, Netherlands | Bishop of Sankt Pölten, Austria |
| 25 Jan | 40.0 | Resigned | François Bareau de Girac † | Bishop of Saint-Brieuc, France | Bishop Emeritus of Rennes, France |
| 53.0 | Resigned | Henri-Louis-René Des Nos † | Bishop of Rennes, France | Bishop of Verdun, France |
| 26 Jan | 76.4 | Resigned | Bernardo Cangiani † | Bishop of Boiano, Italy | Bishop Emeritus |
| 28 Jan | 76.6 | Died | Luigi d’Alessandro † | Archbishop of Bari (-Canosa), Italy |
| 29 Jan | 68.1 | Elevated to Cardinal | Paulo de Carvalho de Mendoça † | Died Before Publication | Cardinal, |
| 58.1 | Appointed | Jean de Cairol de Madaillan † | Bishop of Vence, France | Bishop Emeritus of Grenoble, France |
| 40.0 | Appointed | Agostino Gervasio, O.S.A. † | Bishop of Gallipoli, Italy | Archbishop of Capua, Italy |
| 58.0 | Appointed | Agostino Gorgoni † | Bishop of Castro di Puglia, Italy |
| 44.5 | Appointed | Santiago José Echaverría Nieto de Osorio y Elguera † | Bishop of Santiago de Cuba | Bishop of Tlaxcala, México |
| 55.4 | Elevated to Cardinal | Mario Marefoschi Compagnoni † | In Pectore | Cardinal, Prefect of the Congregation of Rites |
| 49.1 | Appointed | Mariano Martí † | Bishop of Caracas, Santiago de Venezuela |
| 49.8 | Appointed | Giovanni Battista de Pergen † | Bishop of Mantova, Italy |
| 66.7 | Appointed | Juan Portugal de la Puebla † | Titular Archbishop of Perge | Titular Patriarch of Constantinople |
| 46.9 | Appointed | Francesco Ferdinando Sanseverino, C.P.O. † | Bishop of Alife, Italy | Archbishop of Palermo, Italy |
| 59.1 | Appointed | Filippo Sanseverino † | Titular Archbishop of Nicaea | Bishop Emeritus of Alife, Italy |
| 64.9 | Appointed | Nicola Spedalieri † | Bishop of Oppido Mamertina, Italy |
| Feb | 88.6 | Died | Eusebio Ciani † | Bishop of Massa Marittima, Italy |
| 2 Feb | | Born | Tomas Manoel de Noronha e Brito, O.P. † | Lisboa, Portugal | Bishop Emeritus of Olinda, Brazil |
| 4 Feb | 40.0 | Ordained Bishop | Agostino Gervasio, O.S.A. † | Bishop of Gallipoli, Italy | Archbishop of Capua, Italy |
| 58.0 | Ordained Bishop | Agostino Gorgoni † | Bishop of Castro di Puglia, Italy |
| 46.9 | Ordained Bishop | Francesco Ferdinando Sanseverino, C.P.O. † | Bishop of Alife, Italy | Archbishop of Palermo, Italy |
| 48.2 | Ordained Bishop | Juan Varela Fondevilla y Verea † | Titular Bishop of Tanis | Auxiliary Bishop of Santiago de Compostela, Spain |
| 46.5 | Ordained Bishop | Rudolf Joseph von Edling † | Titular Bishop of Capharnaum | Archbishop Emeritus of Gorizia (Görz), Italy |
| 6 Feb | 86.2 | Died | Franz Kaspar von Franken-Siersdorf † | Auxiliary Bishop of Köln {Cologne}, Germany |
| 7 Feb | | Born | Andrew Carruthers † | Drumillan Miln, New Abbey, Kirkcudbrightshire | Vicar Apostolic of Eastern District, Scotland, Great Britain |
| 12 Feb | 68.3 | Died | Giovanni Anzani † | Bishop of Satriano e Campagna, Italy |
| Born | Carlo Cavalieri Manassi † | Comacchio | Bishop of Terracina, Priverno e Sezze, Italy |
| Born | Guillaume-Aubin de Villčle † | Caraman | Archbishop of Bourges, France |
| 22 Feb | | Born | Jean Arnold Barrett † | Looz | Bishop of Namur {Namen}, Belgium |
| 23 Feb | | Born | Claude-Louis de Lesquen † | Trégon | Bishop Emeritus of Rennes, France |
| Born | Antonio Pallotta † | Ferrara, Italy | Cardinal, Prefect of the Apostolic Signatura |
| 24 Feb | | Born | James Buckley † | London | Vicar Apostolic of Trinidad, Trinidad and Tobago, Antilles |
| Mar | 52.5 | Died | Giovanni Maria Spinelli, C.R. † | Archbishop of Messina, Italy |
| 4 Mar | 49.9 | Ordained Bishop | Giovanni Battista de Pergen † | Bishop of Mantova, Italy |
| 5 Mar | 77.6 | Appointed | Aleixo de Miranda Henriques, O.P. † | Bishop of Porto, Portugal |
| 46.0 | Appointed | Manuel do Cenáculo Vilas Boas, T.O.R. † | Bishop of Beja, Portugal | Archbishop of Évora, Portugal |
| 7 Mar | | Born | Grzegorz Tomasz Ziegler, O.S.B. † | Kirchheim w Szwabii | Bishop of Linz, Austria |
| 10 Mar | 24.8 | Ordained Priest | Felix Antonius d’Alessandria † | Priest | Bishop of Cariati e Cerenzia, Italy |
| 23.0 | Ordained Priest | Giacinto della Torre, O.S.A. † | Priest of Order of St. Augustine | Archbishop of Torino {Turin}, Italy |
| 24.4 | Ordained Priest | Giuseppe Francesco Maria Ferraris da Genola † | Priest | Bishop of Saluzzo, Italy |
| 65.2 | Died | Charles de Grimaldi d’Antibes † | Bishop of Rodez, France |
| 11 Mar | | Born | Antonio Baldini † | Roma, Italy | Titular Archbishop of Neocaesarea in Ponto |
| 12 Mar | | Born | Camillo Alleva † | Napoli | Archbishop of Salerno (-Acerno), Italy |
| 57.3 | Appointed | Juan Manuel Argüelles † | Bishop of Palencia, Spain |
| 56.5 | Appointed | Tomás de Azpuru Ximénez † | Archbishop of Valencia, Spain |
| 40.1 | Confirmed | François Bareau de Girac † | Bishop of Rennes, France | Bishop Emeritus |
| 49.8 | Appointed | Martino Bianchi † | Archbishop of Lucca, Italy |
| 39.2 | Confirmed | Louis-Henri de Bruyčre de Chalabre † | Bishop of Saint-Pons-de-Thomičres, France |
| 38.8 | Appointed | Giovanni Capece † | Bishop of Oria, Italy |
| 53.2 | Confirmed | Henri-Louis-René Des Nos † | Bishop of Verdun, France |
| 61.1 | Appointed | Jacobus Maria de Tarsia, O.M. † | Bishop of Martirano (Martoranum), Italy |
| 35.2 | Appointed | Jules-Basile Ferron de La Ferronnays † | Bishop of Saint-Brieuc, France | Bishop of Lisieux, France |
| 59.8 | Appointed | Antonio Fernández Tobar † | Bishop of Tui, Spain |
| 60.7 | Appointed | Luigi del Giudice, O.S.B. † | Archbishop of Chieti, Italy |
| 43.4 | Appointed | Karl Aloys von Königsegg und Rothenfels † | Auxiliary Bishop of Köln {Cologne}, Germany |
| 43.4 | Appointed | Karl Aloys von Königsegg und Rothenfels † | Titular Bishop of Myrina | Auxiliary Bishop of Köln {Cologne}, Germany |
| 63.1 | Appointed | Domenico Micillo † | Bishop of Boiano, Italy |
| Appointed | Miguel Moreno y Ollo † | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 47.2 | Appointed | Juan Manuel Moscoso y Peralta † | Titular Bishop of Tricomia | Archbishop of Granada, Spain |
| 47.2 | Confirmed | Juan Manuel Moscoso y Peralta † | Auxiliary Bishop of Arequipa, Peru | Archbishop of Granada, Spain |
| 31.3 | Confirmed | Ferdinand-Maximilien-Mériadec de Rohan-Guémené † | Archbishop of Bordeaux, France | Archbishop Emeritus of Cambrai, France |
| 18 Mar | 24.0 | Ordained Priest | Rafael de Castello de Vide, O.F.M. † | Priest of Order of Friars Minor | Bishop of Săo Tomé e Príncipe |
| 63.2 | Ordained Bishop | Domenico Micillo † | Bishop of Boiano, Italy |
| 19 Mar | 49.8 | Ordained Bishop | Martino Bianchi † | Archbishop of Lucca, Italy |
| 38.9 | Ordained Bishop | Giovanni Capece † | Bishop of Oria, Italy |
| 61.1 | Ordained Bishop | Jacobus Maria de Tarsia, O.M. † | Bishop of Martirano (Martoranum), Italy |
| 60.7 | Ordained Bishop | Luigi del Giudice, O.S.B. † | Archbishop of Chieti, Italy |
| 20 Mar | 60.2 | Appointed | Simon Ambros Stock † | Titular Bishop of the Titular See |
| 23 Mar | 46.7 | Appointed | Miguel António Barreto de Meneses † | Bishop of Bragança, Portugal | Bishop Emeritus of Miranda (do Douro), Portugal |
| 25 Mar | 24.8 | Ordained Priest | Pietro Delenda † | Priest | Bishop of Santorini {Thira}, Greece |
| 30 Mar | 78.0 | Died | Pascual de los Herreros † | Bishop of León, Spain |
| 24.5 | Ordained Priest | Charles Mannay † | Priest of Clermont, France | Bishop of Rennes, France |
| 31 Mar | 27.3 | Ordained Priest | Francesco Giovanni Scutellari Ajani † | Priest | Titular Bishop of Ioppe |
| 2 Apr | | Born | Pierre-Alexandre Coupperie † | La Chapelle-Palluau, France | Bishop of Baghdad, Iraq |
| 3 Apr | | Born | Vicente Román y Linares, O. Praem. † | Valladolid | Auxiliary Bishop of Sevilla {Seville}, Spain |
| 6 Apr | 76.0 | Died | Blas Roldán, O.S.H. † | Bishop of Segorbe, Spain |
| 7 Apr | | Appointed | Dionysius Maguire, O.F.M. † | Bishop of Kilmore, Ireland |
| 8 Apr | 35.3 | Ordained Bishop | Jules-Basile Ferron de La Ferronnays † | Bishop of Saint-Brieuc, France | Bishop of Lisieux, France |
| 31.4 | Ordained Bishop | Ferdinand-Maximilien-Mériadec de Rohan-Guémené † | Archbishop of Bordeaux, France | Archbishop Emeritus of Cambrai, France |
| 10 Apr | | Appointed | Patrick Brady, O.F.M. † | Bishop of Dromore, Ireland |
| Appointed | John Carpenter † | Archbishop of Dublin, Ireland |
| 11 Apr | | Born | Pietro Ignazio Marolda, C.SS.R. † | Muro Lucano | Bishop of Pozzuoli, Italy |
| 14 Apr | 26.9 | Ordained Priest | Pietro Leopardi † | Priest of Recanati e Loreto, Italy | Titular Bishop of Akka |
| 48.3 | Succeeded | Charles Walmesley, O.S.B. † | Vicar Apostolic of Western District, England, Great Britain |
| 83.3 | Died | Lawrence William York, O.S.B. † | Vicar Apostolic Emeritus of Western District, England, Great Britain |
| 20 Apr | 64.1 | Died | Franz Christoph von Hutten zu Stolzenfels † | Cardinal, Bishop of Speyer, Germany |
| 22 Apr | 39.3 | Ordained Bishop | Louis-Henri de Bruyčre de Chalabre † | Bishop of Saint-Pons-de-Thomičres, France |
| 43.5 | Ordained Bishop | Karl Aloys von Königsegg und Rothenfels † | Titular Bishop of Myrina | Auxiliary Bishop of Köln {Cologne}, Germany |
| Born | Pierre-Joseph Rey † | Mégevette, France | Bishop of Annecy, France |
| 71.1 | Died | Zsigmond Antal Sztojka de Sala et Kricsfalva † | Bishop Emeritus of Transilvania, Erdély, Siebenbürgen, Romania |
| 26 Apr | 47.3 | Appointed | Joannes Chrysostomus de Clugny, O.F.M. Conv. † | Archbishop of Durrës (Durazzo) (Albanian), Albania |
| 29 Apr | 72.3 | Ordained Bishop | Antoni Gorczyński † | Titular Bishop of Coronea | Auxiliary Bishop of Kyiv-Halyč {Kiev} (Ruthenian), Ukraine |
| 54.1 | Ordained Bishop | Nicolň Antonio Spínola, O.M. † | Titular Archbishop of Naupactus |
| 2 May | 90.5 | Died | Giacomo Oddi † | Cardinal, Bishop of Viterbo e Tuscania, Italy |
| 13 May | 47.4 | Ordained Bishop | Joannes Chrysostomus de Clugny, O.F.M. Conv. † | Archbishop of Durrës (Durazzo) (Albanian), Albania |
| 15 May | 69.7 | Died | Giuseppe Maria Centini † | Bishop of Montalto (delle Marche), Italy |
| 18 May | 61.3 | Appointed | Nicola Ferri † | Bishop of Satriano e Campagna, Italy |
| 19 May | 78.9 | Died | Gilbert-Gaspard de Montmorin de Saint-Hérem de La Chassaigne † | Bishop of Langres, France |
| 28 May | 53.7 | Appointed | Orazio Berarducci † | Bishop of Bitonto, Italy |
| 43.7 | Appointed | Franciscus Condulmer † | Titular Bishop of Famagusta |
| 49.7 | Appointed | Francisco de los Ríos y Armengol, O.P. † | Bishop of Panamá |
| 62.2 | Appointed | Antonio Gómez de la Torre y Jaraveitia † | Bishop of Jaén, Spain |
| 50.8 | Appointed | Giovanni Morosini, O.S.B. † | Bishop of Chioggia, Italy | Bishop of Verona, Italy |
| 68.3 | Appointed | Giovanni Carmine Pellerano, O.S.Io.Hieros. † | Bishop of Malta | Bishop Emeritus |
| 41.7 | Appointed | Adelmo Gennaro Pignatelli, O.S.B. † | Archbishop of Bari (-Canosa), Italy | Archbishop of Capua, Italy |
| 73.8 | Appointed | Giuseppe Pozzobenelli † | Cardinal-Priest of San Lorenzo in Lucina | Cardinal, Archbishop of Milano {Milan}, Italy |
| 29 May | 49.2 | Selected | Damian August Philipp Karl von Limburg-Styrum † | Bishop of Speyer, Germany |
| 2 Jun | 21.6 | Ordained Deacon | Mikolaj Bykowski, O.P. † | Deacon of Order of Friars Preachers | Titular Bishop of Troas |
| 3 Jun | 53.7 | Ordained Bishop | Orazio Berarducci † | Bishop of Bitonto, Italy |
| Ordained Bishop | John Carpenter † | Archbishop of Dublin, Ireland |
| 62.2 | Ordained Bishop | José Vicente Díaz Bravo, O. Carm. † | Bishop of Durango, México |
| 50.9 | Ordained Bishop | Giovanni Morosini, O.S.B. † | Bishop of Chioggia, Italy | Bishop of Verona, Italy |
| 41.7 | Ordained Bishop | Adelmo Gennaro Pignatelli, O.S.B. † | Archbishop of Bari (-Canosa), Italy | Archbishop of Capua, Italy |
| 8 Jun | | Born | Anton Alois Buchmayer † | Waidhofen | Bishop of Sankt Pölten, Austria |
| 22.2 | Ordained Deacon | Jozef Kluch † | Deacon | Bishop of Nitra, Slovakia |
| 9 Jun | | Born | Francesco Alberini † | Roma | Bishop of Terracina, Priverno e Sezze, Italy |
| 23.0 | Ordained Priest | Angelo Antonio Anselmi † | Priest | Bishop of San Severino (Marche), Italy |
| Born | Ferdinando Maria Pignatelli, C.R. † | Napoli | Cardinal, Archbishop of Palermo, Italy |
| 13 Jun | | Born | Antonio Mauricio Ribeiro † | Evora | Auxiliary Bishop of Évora, Portugal |
| 16 Jun | 72.5 | Died | François-Ernest de Salm-Reifferscheid † | Bishop of Tournai {Doornik}, Belgium |
| 18 Jun | | Born | Pedro Paulo de Figuereido da Cunha e Melo † | Taveiro | Cardinal, Archbishop of Braga, Portugal |
| 24 Jun | 56.8 | Ordained Bishop | Tomás de Azpuru Ximénez † | Archbishop of Valencia, Spain |
| 34.8 | Selected | Jérôme-Marie Champion de Cicé † | Bishop of Rodez, France | Archbishop of Aix, France |
| 60.1 | Ordained Bishop | Antonio Fernández Tobar † | Bishop of Tui, Spain |
| 32.0 | Selected | César-Guillaume de la Luzerne † | Bishop of Langres, France | Cardinal, Bishop Emeritus |
| 30.9 | Ordained Priest | Girolamo Pavesi † | Priest | Bishop of Pontremoli, Italy |