| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Died | Cristóvão de Almeida Soares † | Bishop of Pinhel, Portugal |
| 24.0 | Ordained Priest | Pierre-François-Gabriel-Raymond-Ignace-Ferdinand de Bausset-Roquefort † | Priest | Archbishop of Aix (-Arles-Embrun), France |
| 17.8 | Professed | Karl Adalbert Freiherr von Beyer, O. Praem. † | Member of Order of the Canons Regular of Premontre; Norbertines | Auxiliary Bishop of Köln {Cologne}, Germany |
| Succeeded | Anthony Coyle † | Bishop of Raphoe, Ireland |
| 25.7 | Ordained Priest | Juan José Díaz de Espada y Fernánez de Landa † | Priest of Segovia, Spain | Bishop of San Cristobal de la Habana, Cuba |
| 38.0 | Appointed | François de Gain de Montaignac † | Bishop of Tarbes, France | Bishop Emeritus |
| 18.2 | Professed | Wilhelm Arnold Günther, O. Praem. † | Member of Order of the Canons Regular of Premontre; Norbertines | Auxiliary Bishop of Trier, Germany |
| 71.7 | Died | Marcantonio Lombardi † | Bishop of Crema, Italy |
| 52.4 | Ordained Bishop | Francisco López Sánchez † | Bishop of Ayacucho o Huamanga, Peru |
| 26.0 | Ordained Priest | Ranald MacDonald † | Priest | Vicar Apostolic of Western District, Scotland, Great Britain |
| 35.6 | Appointed | José António Pinto de Mendonça Arrais † | Bishop of Pinhel, Portugal | Bishop of Guarda, Portugal |
| 79.1 | Died | Giulio Matteo Natali † | Bishop of Tivoli, Italy |
| 24.1 | Ordained Priest | Antoine-Xavier de Neirac † | Priest | Bishop of Tarbes, France |
| Appointed | Alejandro José de Ochoa y Morillo † | Bishop of Santa Cruz de la Sierra, Bolivia |
| Appointed | Richard O'Reilly † | Coadjutor Archbishop of Armagh, Ireland | Archbishop |
| 64.6 | Died | Domenico Russo † | Bishop of Monopoli, Italy |
| 68.6 | Died | Francesco Antonio Scoppa † | Bishop of Ostuni, Italy |
| Appointed | Kasper Józef Szajowski † | Auxiliary Bishop of Gniezno, Poland |
| Appointed | Kasper Józef Szajowski † | Titular Bishop of Laranda | Auxiliary Bishop of Gniezno, Poland |
| 71.4 | Died | Giuseppe de Vignoli † | Bishop of Forli, Italy |
| 6 Jan | 37.2 | Ordained Bishop | Pierre-Louis de La Rochefoucauld-Bayers † | Bishop of Saintes, France |
| 8 Jan | | Born | Tommaso Riario Sforza † | Naples | Cardinal, Priest of the Roman Curia - Other |
| 15 Jan | 39.0 | Appointed | Jean-Didier de Saint Martin, M.E.P. † | Coadjutor Vicar Apostolic of Se-Ciuen, China | Vicar Apostolic |
| 39.0 | Appointed | Jean-Didier de Saint Martin, M.E.P. † | Bishop of Charadrus | Vicar Apostolic of Se-Ciuen, China |
| 18 Jan | | Born | Ferdinando Minucci † | Volterra | Archbishop of Firenze {Florence}, Italy |
| 21 Jan | | Born | Francesco Barzellotti † | Pian Castagnajo | Bishop of Sovana-Pitigliano, Italy |
| 23 Jan | 42.1 | Appointed | José Nicolau de Azevedo Coutinho Gentil † | Prelate of Cuiabá, Brazil | Prelate of Goiás, Brazil |
| 2 Feb | | Ordained Bishop | Alexandre de Gouveia, T.O.R. † | Bishop of Northern Chi-Li {Ce-Li Settentrionale} o Pe-Kin, China |
| 3 Feb | 54.1 | Ordained Bishop | José Constancio Andino † | Bishop of Albarracin, Spain | Bishop of Osma, Spain |
| 66.9 | Died | Juan Ignacio de la Rocha † | Bishop of Michoacán, Michoacán, México |
| 7 Feb | 82.3 | Died | Michele Casati † | Bishop of Mondovi, Italy |
| 15 Feb | | Born | Niccola Belletti † | Cesena | Bishop of Foligno, Italy |
| 21 Feb | 74.0 | Died | Gioacchino Martínez † | Bishop of Avellino-Frigento, Italy |
| 23 Feb | 23.0 | Ordained Priest | Pietro Caprano † | Priest | Cardinal, Prefect of the Congregation of the Index |
| 83.1 | Died | Giovanni Battista Lattanzi † | Bishop of Città di Castello, Italy |
| 25 Feb | 57.6 | Appointed | Cayetano Adsor Paredes † | Patriarch of West Indies, Antilles |
| 33.1 | Confirmed | Anne-Antoine-Jules de Clermont-Tonnerre † | Bishop of Chalons-sur-Marne, France | Cardinal, Archbishop of Toulouse (-Narbonne), France |
| 45.6 | Appointed | Giuseppe Firrao † | Titular Archbishop of Petra in Palaestina | Cardinal, Secretary of the Congregation of Bishops and Regulars |
| 53.3 | Confirmed | Antoine-Eléonore-Léon Le Clerc de Juigné † | Archbishop of Paris, France | Archbishop Emeritus |
| Appointed | Raimondo Moncada † | Bishop of Patti, Italy |
| 51.3 | Appointed | Domenico Pignatelli di Belmonte, C.R. † | Bishop of Caserta, Italy | Cardinal, Archbishop of Palermo, Italy |
| 26 Feb | | Appointed | James Caulfield † | Coadjutor Bishop of Ferns, Ireland | Bishop |
| 3 Mar | 51.3 | Ordained Bishop | Domenico Pignatelli di Belmonte, C.R. † | Bishop of Caserta, Italy | Cardinal, Archbishop of Palermo, Italy |
| 4 Mar | 26.0 | Ordained Priest | Jean-Eléonor Montanier de Belmont † | Priest | Bishop of Saint-Flour, France |
| 7 Mar | | Born | Angelo Mai † | Schilpario | Cardinal, Librarian of the Vatican Library |
| 16 Mar | 45.7 | Ordained Priest | Giuseppe Firrao † | Priest | Cardinal, Secretary of the Congregation of Bishops and Regulars |
| 42.2 | Ordained Priest | Antonio Felice Zondadari † | Priest | Cardinal, Archbishop of Siena, Italy |
| 17 Mar | | Born | Juan José Bonel y Orbe † | Pinos del Rey | Cardinal, Archbishop of Toledo, Spain |
| 20 Mar | | Born | Manuel Joaquín Tarancón y Morón † | Covarrubias | Cardinal, Archbishop of Sevilla {Seville}, Spain |
| 21 Mar | | Born | Józef Joachim Goldtmann † | Wejherowo | Bishop of Sandomierz, Poland |
| 31 Mar | 45.7 | Ordained Bishop | Giuseppe Firrao † | Titular Archbishop of Petra in Palaestina | Cardinal, Secretary of the Congregation of Bishops and Regulars |
| 27.4 | Ordained Priest | Istvan Fischer de Nagy † | Priest of Eger, Hungary | Archbishop of Eger, Hungary |
| 6 Apr | 73.5 | Died | Matteo Gennaro Testa Piccolomini † | Archbishop Emeritus of Reggio Calabria, Italy |
| 7 Apr | 61.3 | Ordained Bishop | Pierre Peineau du Verdier, C.O. † | Bishop of Acci and Mariana, France |
| 8 Apr | 45.7 | Appointed | Giuseppe Firrao † | Apostolic Nuncio to Italy | Cardinal, Secretary of the Congregation of Bishops and Regulars |
| 14 Apr | 33.3 | Ordained Bishop | Anne-Antoine-Jules de Clermont-Tonnerre † | Bishop of Chalons-sur-Marne, France | Cardinal, Archbishop of Toulouse (-Narbonne), France |
| 16 Apr | 72.9 | Died | Francisco Alejandro Bocanegra Jivaja † | Archbishop of Santiago de Compostela, Spain |
| 17 Apr | | Born | Stanislao Vincenzo Tomba, B. † | Bologna | Archbishop of Camerino, Italy |
| 19 Apr | 55.2 | Installed | József Batthyány † | Cardinal-Priest of S. Bartolomeo all’Isola | Cardinal, Archbishop of Esztergom, Hungary |
| Born | Vicente Ortiz Labastida, O.P. † | Zaragoza | Bishop of Tarazona, Spain |
| 22 Apr | | Born | Antonio Monforte † | Napoli | Bishop of Troia, Italy |
| 30 Apr | | Born | Leone Ciampa, O.F.M. † | Serra Capriola | Archbishop of Sorrento, Italy |
| 5 May | 60.8 | Died | Bernardino Giraud † | Cardinal, Archbishop Emeritus of Ferrara, Italy |
| 73.2 | Died | Joseph-Nicolas de Montenach † | Bishop of Lausanne, Switzerland |
| 14 May | 73.7 | Died | João Evangelista Pereira da Silva, T.O.R. † | Bishop of Belém do Pará, Brazil |
| 19 May | | Ordained Bishop | Kasper Józef Szajowski † | Titular Bishop of Laranda | Auxiliary Bishop of Gniezno, Poland |
| 21 May | | Died | João Marcelino dos Santos Homem Aparício † | Bishop of Angra, Portugal |
| 22 May | 38.3 | Appointed | Alessandro Mattei † | Cardinal-Priest of S. Balbina | Cardinal, Bishop of Ostia (-Velletri), Italy |
| 38.3 | Elevated to Cardinal | Alessandro Mattei † | Cardinal, Bishop of Ostia (-Velletri), Italy |
| 25 May | 24.1 | Ordained Priest | Gabrio Maria Nava † | Priest | Bishop of Brescia, Italy |
| 23.8 | Ordained Priest | Carlo Giuseppe Maria Sappa de Milanes † | Priest | Bishop of Acqui, Italy |
| 31 May | | Born | Antonio Piatti † | | Titular Patriarch of Antiochia {Antioch}, Syria |
| 2 Jun | 71.1 | Died | Alessandro Galletti † | Bishop of Volterra, Italy |
| 12 Jun | 62.5 | Died | Bernardo Velarde Velarde † | Archbishop of Zaragoza, Spain |
| 18 Jun | 68.9 | Died | Antonio Manuel Hartalejo López, O. de M. † | Bishop of Vic, Spain |
| 60.6 | Died | Marcantonio Marcolini † | Cardinal, Titular Archbishop of Thessalonica |
| 24 Jun | | Born | Antonio Luigi Wolf † | Idria | Bishop of Ljubljana, Slovenia |
| 30 Jun | 63.2 | Ordained Bishop | Miguel de Pamplona González Bassecourt, O.F.M. Cap. † | Bishop of Arequipa, Peru | Bishop Emeritus |
| 25.1 | Ordained Priest | Vasco José a Domina Nostra de Bona Morte Lobo, C.R.S.A. † | Priest of Confederation of Canons Regular of St. Augustine | Prelate Emeritus of Mozambico, Mozambique |
| 7 Jul | | Ordained Bishop | James Caulfield † | Coadjutor Bishop of Ferns, Ireland | Bishop |
| 11 Jul | | Born | Pietro Naselli † | Palermo | Bishop of Piazza Armerina, Italy |
| 12 Jul | 57.9 | Died | Cayetano Adsor Paredes † | Patriarch of West Indies, Antilles |
| 13 Jul | | Died | José de Jesus Maria Caetano, O.P. † | Bishop of Castelo Branco, Portugal |
| 14 Jul | 43.2 | Appointed | Pierre de Séguiran † | Coadjutor Bishop of Nevers, France | Bishop |
| 21 Jul | 55.3 | Appointed | Vicente Ferreira da Rocha, O.P. † | Bishop of Castelo Branco, Portugal |
| 23 Jul | | Born | Santiago Rodríguez Gil, O.P. † | Santa Cristina de Valeye | Bishop of Lugo, Spain |
| 24 Jul | 62.6 | Died | Jacques de Grasse † | Bishop of Angers, France |
| 27 Jul | | Born | Luigi Paolo Pochettini † | Chambery | Bishop of Ivrea, Italy |
| 1 Aug | | Born | St. Eugène-Charles-Joseph de Mazenod, O.M.I. † | Aix-en-Provence | Bishop of Marseille, France |
| 3 Aug | 73.5 | Died | Giovanni Ottavio Bufalini † | Cardinal, Bishop of Ancona e Numana, Italy |
| 4 Aug | 55.6 | Appointed | Michel-François de Couët du Vivier de Lorry † | Bishop of Angers, France | Bishop Emeritus of La Rochelle, France |
| 5 Aug | 72.1 | Died | Juan Manuel Merino Lumbreras † | Bishop of Astorga, Spain |
| 13 Aug | | Born | Charles-Jean de la Motte de Broons et de Vauvert † | Château de Launac, Saint-Père-Marc-en-Poulet | Bishop of Vannes, France |
| 24 Aug | 55.5 | Appointed | José da Avé-Maria Leite da Costa e Silva † | Bishop of Angra, Portugal |
| 3 Sep | | Born | Benedict Joseph Fenwick, S.J. † | Leonard Town, MD | Bishop of Boston, Massachusetts, USA |
| Born | Camillo Milana † | Palermo | Bishop of Nicosia, Italy |
| 13 Sep | 47.4 | Appointed | Frantisek de Paula Herzan von Harras † | Cardinal-Priest of Ss. Nereo ed Achilleo | Cardinal, Bishop of Szombathely, Hungary |
| 14 Sep | 69.4 | Died | Serafino Filangeri, O.S.B. † | Archbishop of Napoli {Naples}, Italy |
| Died | Marco Aurelio Petruccelli † | Bishop of Nardò, Italy |
| 15 Sep | 53.0 | Ordained Bishop | Antonio María de los Reyes Almada, O.F.M. † | Bishop of Sonora, Sonora, México |
| 24.8 | Ordained Priest | Konstantin Stanich † | Priest of Križevci (Byzantine), Croatia | Bishop |
| 16 Sep | | Appointed | Giuseppe Monticelli † | Bishop of Ugento, Italy |
| 19 Sep | | Born | Gioacchino Tamberini (Tamburini) † | Imola | Bishop of Cervia, Italy |
| 21 Sep | 27.7 | Ordained Priest | Giovanni Battista Bussi † | Priest | Cardinal, Archbishop of Benevento, Italy |
| 25.6 | Ordained Priest | Domenico Buttaoni † | Priest | Bishop of Fabriano e Matelica, Italy |
| 24.0 | Ordained Priest | Pietro Francesco Morali † | Priest | Archbishop of Firenze {Florence}, Italy |
| 28.7 | Ordained Priest | Agostino Olivieri, Sch. P. † | Priest of Order of the Pious Schools | Titular Bishop of Arethusa |
| 22.9 | Ordained Priest | Placido Maria Tadini, O.C.D. † | Priest of Order of Discalced Carmelites | Cardinal, Archbishop of Genova, Italy |
| 23 Sep | 51.9 | Appointed | Pietro Boscarini † | Bishop of Città di Castello, Italy |
| Appointed | Luigi Buonamici † | Bishop of Volterra, Italy |
| 55.7 | Confirmed | Michel-François de Couët du Vivier de Lorry † | Bishop of Angers, France | Bishop Emeritus of La Rochelle, France |
| 60.3 | Appointed | Juam Manuel Antonio Ramos Lora, O.F.M. † | Bishop of Mérida, Venezuela |
| 44.5 | Appointed | Antonio Maria Gardini † | Bishop of Crema, Italy |
| Born | Johann Michael Leonhard † | Grafenwörth | Bishop of Austria, Military |
| 54.9 | Appointed | Guglielmo Pallotta † | Cardinal-Priest of S. Maria degli Angeli | Cardinal, Prefect of the Congregation of the Council |
| 24 Sep | 43.4 | Succeeded | Pierre de Séguiran † | Bishop of Nevers, France |
| 85.4 | Died | Jean-Antoine de Tinseau † | Bishop of Nevers, France |
| 1 Oct | 73.8 | Appointed | Manuel Buenaventura Figueroa Barrero † | Titular Archbishop of Laodicea in Phrygia | Patriarch of West Indies, Antilles |
| 6 Oct | 29.7 | Ordained Priest | Giovanni Francesco Guerrieri † | Priest | Bishop Emeritus of Rimini, Italy |
| 17 Oct | | Born | Karel Boromejský Hanl z Kirchtreu † | Horbicio | Bishop of Hradec Králové, Czech Republic |
| 20 Oct | 38.8 | Ordained Bishop | François de Gain de Montaignac † | Bishop of Tarbes, France | Bishop Emeritus |
| Born | Pedro Alcántara Jiménez, O. Praem. † | Cantalapiedra, Spain | Vicar Apostolic of Montevideo, Uruguay |
| 21 Oct | | Born | Francesco Gentilini † | Spoleto | Bishop of Rimini, Italy |
| 2 Nov | 58.9 | Appointed | Berndard-Emmanuel (François-Pierre) de Lenzbourg, O. Cist. † | Bishop of Lausanne, Switzerland |
| 11 Nov | 55.5 | Died | Friedrich Ludwig Franz Reichsfreiherr von Wangen zu Geroldseck † | Bishop of Basel, Switzerland |
| 17 Nov | | Born | Domenico Ciluffo † | Palermo, Italy | Titular Bishop of Adana |
| 25 Nov | 55.9 | Appointed | Franz Joseph Sigismund von Roggenbach † | Bishop of Basel, Switzerland |
| 9 Dec | 86.9 | Died | Lodovico Calini † | Bishop Emeritus of Crema, Italy | Cardinal, Bishop |
| 16 Dec | 42.3 | Appointed | Cayetano Da Annunciação Brandão, T.O.R. † | Bishop of Belém do Pará, Brazil | Archbishop of Braga, Portugal |
| 72.0 | Appointed | Giuseppe Maria Capece Zurlo, Theat. † | Cardinal, Archbishop of Napoli {Naples}, Italy |
| 72.0 | Elevated to Cardinal | Giuseppe Maria Capece Zurlo, Theat. † | Cardinal, Archbishop of Napoli {Naples}, Italy |
| 42.3 | Appointed | Barnaba (Gregorio) Chiaramonti, O.S.B. † | Bishop of Tivoli, Italy | Pope (Roma {Rome}, Italy) |
| 32.7 | Appointed | Etienne-André-François de Paule de Fallot de Béaupré de Beaumont † | Coadjutor Bishop of Vaison, France | Bishop Emeritus |
| 32.7 | Appointed | Etienne-André-François de Paule de Fallot de Béaupré de Beaumont † | Titular Bishop of Sebastopolis in Armenia | Bishop Emeritus of Vaison, France |
| 45.6 | Appointed | Alexandre da Sagrada Familia Ferreira da Silva, O.F.M. † | Bishop of Malacca, Singapore | Bishop of Angra, Portugal |
| 55.7 | Confirmed | Vicente Ferreira da Rocha, O.P. † | Bishop of Castelo Branco, Portugal |
| 74.0 | Appointed | Manuel Buenaventura Figueroa Barrero † | Patriarch of West Indies, Antilles |
| 67.9 | Elevated to Cardinal | Raniero Finocchietti † | In Pectore | Cardinal, Cardinal-Deacon of S. Agata de’ Goti |
| 45.4 | Appointed | Domingo a Rosario, O.P. † | Bishop of São Tomé e Príncipe |
| 51.9 | Appointed | Niccolò Sciarelli † | Bishop of Colle di Val d’Elsa, Italy |
| 45.0 | Appointed | Camillo de Simeoni † | Cardinal, Bishop of Sutri, Italy |
| 60.2 | Appointed | Rafael José Verger y Suau, O.F.M. † | Bishop of Linares o Nueva León, Nuevo León, México |
| 17 Dec | 52.2 | Appointed | Vicente do Espirito Santo, O.A.D. † | Prelate of Goiás, Brazil |
| 21 Dec | 24.1 | Ordained Priest | Gaetano Maria Avarna † | Priest | Bishop of Nicosia, Italy |
| 42.4 | Ordained Bishop | Barnaba (Gregorio) Chiaramonti, O.S.B. † | Bishop of Tivoli, Italy | Pope (Roma {Rome}, Italy) |
| 32.7 | Ordained Bishop | Etienne-André-François de Paule de Fallot de Béaupré de Beaumont † | Titular Bishop of Sebastopolis in Armenia | Bishop Emeritus of Vaison, France |
| 24.4 | Ordained Priest | Francesco Maria Paolucci Mancinelli † | Priest | Bishop of Fano, Italy |
| 22.9 | Ordained Priest | Georg Michael Wittmann † | Priest of Regensburg, Germany | Auxiliary Bishop |
| 25 Dec | 48.7 | Died | Scipione Borghèse † | Cardinal, Prefect Emeritus of the Prefecture of the Papal Household |
| 26 Dec | 75.9 | Died | Wilhelm Anton Freiherr von der Asseburg zu Hinnenburg † | Bishop of Paderborn, Germany |
| 55.9 | Confirmed | José da Avé-Maria Leite da Costa e Silva † | Bishop of Angra, Portugal |
| 55.7 | Succeeded | Friedrich Wilhelm Freiherr von Westphalen † | Bishop of Paderborn, Germany | Bishop of Hildesheim, Germany |
| 30 Dec | | Born | Pedro de Santa Mariana e Souza, O.C.D. † | Recife | Auxiliary Bishop of São Sebastião do Rio de Janeiro, Brazil |