| Date | Age | Event | Bishop | Title | Current Title | 
| unknown | 24.2 | Ordained Priest | Alonso Francos Arango † | Priest | Bishop of Orense, Spain | 
| 53.1 | Appointed | Paolo Basile, O.F.M. Obs. † | Minister General of Order of Observant Friars Minor | Archbishop of Palermo, Italy | 
| 23.6 | Ordained Priest | Martin du Bellay † | Priest | Bishop Emeritus of Fréjus, France | 
 | Born | Marie-Joseph Green de Saint-Marsault † |  | Titular Bishop of Pergamum | 
| 38.0 | Selected | Paul-Alexandre de Guénet † | Bishop of Saint-Pons-de-Thomières, France | 
 | Born | Gjon Logorezzi (Logoreci) † |  | Bishop of Sapë, Albania | 
 | Born | John MacDonald † |  | Vicar Apostolic of Highland District, Scotland, Great Britain | 
| 20.5 | Professed | Joachim-Enjobert de Martiliat, M.E.P. † | Member of La Société des Missions Etrangères | Vicar Apostolic of Se-Ciuen (Setchoan, Szechwan, Sichuan), China | 
| 66.0 | Died | Nicola Portoghese, O.F.M. † | Bishop of Syros (e Milos), Greece | 
| Jan | 66.2 | Resigned | Agostino Pipia, O.P. † | Bishop of Osimo e Cingoli, Italy | Cardinal, Bishop Emeritus | 
| 68.1 | Died | Camillo Spreti † | Bishop of Cervia, Italy | 
| 1 Jan | 50.6 | Ordained Priest | Serafino Cenci † | Priest | Cardinal, Archbishop of Benevento, Italy | 
| 56.1 | Ordained Bishop | Giovanni Battista Lomellini, O.P. † | Bishop of Alghero, Italy | Bishop of Saluzzo, Italy | 
 | Born | Manuel Nicolás Rojas y Argandoña † |  | Bishop of Santa Cruz de la Sierra, Bolivia | 
| 3 Jan | 49.0 | Died | José Gabriel Zapata Illescas † | Bishop of Zamora, Spain | 
| 4 Jan | 84.7 | Died | Giuseppe Sacripante † | Cardinal, Cardinal-Priest of San Lorenzo in Lucina | 
| 5 Jan | 35.1 | Ordained Bishop | Renato Massa † | Bishop of Rimini, Italy | 
| 6 Jan | 16.0 | Professed | Giuseppe Maria Capece Zurlo, C.R. † | Member of Congregation of Clerics Regular | Cardinal, Archbishop of Napoli {Naples}, Italy | 
| 9 Jan |  | Born | Michel-François de Couët du Vivier de Lorry † |  | Bishop Emeritus of La Rochelle, France | 
| 10 Jan | 64.1 | Appointed | Vincenzo Petra † | Prefect of the Congregation for Propagation of the Faith | Cardinal, Cardinal-Bishop of Palestrina | 
| 12 Jan | 51.0 | Ordained Bishop | Pedro del Cañizo Losa y Valera † | Titular Bishop of Arca in Phoenicia | Auxiliary Bishop of Cuenca, Spain | 
| 58.9 | Ordained Bishop | Claude-Léonce-Octavien d’Antelmy † | Bishop of Grasse, France | 
| 39.9 | Ordained Bishop | Jean-François de Macheco de Prémeaux † | Bishop of (Saint-Lizier de) Couserans (or Conserans), France | 
| 19 Jan | 63.7 | Ordained Bishop | José García Fernández, O.F.M. † | Bishop of Sigüenza, Spain | 
| 23.1 | Ordained Deacon | Filippo Niccolò Spinelli † | Deacon | Bishop of Aversa, Italy | 
| 20 Jan | 48.7 | Appointed | Nicola Saverio Albini † | Titular Bishop of Leuce | Titular Archbishop of Athenae | 
| 52.9 | Appointed | Stephan von Clodh (Cloth), O.S.B. † | Auxiliary Bishop of Fulda, Germany | 
| 52.9 | Appointed | Stephan von Clodh (Cloth), O.S.B. † | Titular Bishop of Derbe | Auxiliary Bishop of Fulda, Germany | 
| 72.8 | Appointed | Lorenzo Cozza, O.F.M. Obs. † | Cardinal, Cardinal-Priest of Santa Maria in Ara Coeli | 
| 75.7 | Appointed | Giuseppe Renato Imperiali † | Cardinal, Cardinal-Priest of San Lorenzo in Lucina | 
| 51.8 | Appointed | Prospero Lorenzo Lambertini † | Archbishop (Personal Title) of Ancona e Numana, Italy | Pope (Roma {Rome}, Italy) | 
| 28.3 | Confirmed | Claude-Louis de La Châtre † | Bishop of Agde, France | 
| 30.4 | Appointed | Antonio Nani † | Titular Bishop of Priene | Archbishop of Corfù, Greece | 
| 57.4 | Appointed | Epifanio di Napoli, O.S.B.M. † | Titular Bishop of Lystra | 
| 40.7 | Appointed | Bernard-Antoine Pizzella † | Titular Bishop of Constantia in Arabia | 
| 47.0 | Appointed | Thomas John Francis de Strickland de Sizorghe † | Bishop of Namur {Namen}, Belgium | 
| 58.0 | Appointed | Antonio Francesco Valenti † | Titular Archbishop of Teodosia | 
| 21 Jan | 74.0 | Resigned | Juan Navarro Gilaberte, O. de M. † | Bishop of Albarracin, Spain | Bishop Emeritus | 
 | Born | [Pierre-Anastase Torné] † |  | Bishop Emeritus of [Cher (Constitutional), France] | 
| 26 Jan | 36.5 | Ordained Bishop | François de Baglion de la Salle † | Bishop of Arras, France | 
| 30.8 | Ordained Bishop | Giovanni Filippo Cauti † | Titular Bishop of Erythrae | 
| 23.0 | Ordained Priest | Giusto de Marco, C.R. † | Priest of Congregation of Clerics Regular | Titular Archbishop of Nazareth | 
| 58.1 | Ordained Bishop | Antonio Francesco Valenti † | Titular Archbishop of Teodosia | 
| 29 Jan |  | Born | Pierre-François Cassiet † |  | Prefect Emeritus of Iles Saint-Pierre et Miquelon | 
| 30 Jan |  | Born | József Batthyány † |  | Cardinal, Archbishop of Esztergom, Hungary | 
| Feb | 74.0 | Died | Juan Navarro Gilaberte, O. de M. † | Bishop Emeritus of Albarracin, Spain | 
| 3 Feb | 48.7 | Ordained Bishop | Nicola Saverio Albini † | Titular Bishop of Leuce | Titular Archbishop of Athenae | 
| 5 Feb |  | Born | Salvador Biempica y Sotomayor † |  | Bishop of Tlaxcala (Puebla de los Angeles), México | 
| 28.8 | Ordained Deacon | Aleksander Kazimierz Horain † | Deacon | Auxiliary Bishop Emeritus of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania | 
| 6 Feb |  | Born | António Freire Gameiro de Sousa † |  | Bishop of Aveiro, Portugal | 
 | Born | Pasquale Maria Mastrilli, C.R. † |  | Titular Archbishop of Nazareth | 
| 8 Feb |  | Born | Ludwik Józef de Mathy † |  | Auxiliary Bishop of Poznań, Poland | 
| 9 Feb | 22.9 | Ordained Priest | Giuseppe Lancellotti, O.F.M. Conv. † | Priest of Order of Friars Minor Conventual | Bishop of Isola, Italy | 
| 57.5 | Ordained Bishop | Epifanio di Napoli, O.S.B.M. † | Titular Bishop of Lystra | 
 | Born | [Jean-Baptiste Romée de Villeneuve] † |  | Bishop of [Basses-Alpes (Constitutional), France] | 
| 10 Feb |  | Born | José da Avé-Maria Leite da Costa e Silva, O.SS.T. † |  | Bishop of Angra, Portugal | 
| 12 Feb | 56.7 | Resigned | Antonio Righi † | Bishop of Trebinje e Mrkan, Bosnia and Herzegovina | Bishop Emeritus | 
| 16 Feb | 51.7 | Ordained Bishop | Giovanni Giuseppe Falletti † | Archbishop of Cagliari, Italy | 
| 55.0 | Ordained Bishop | Antonio Nin † | Archbishop of Oristano, Italy | 
| 17 Feb |  | Born | José Campos Julián, O.C.D. † |  | Archbishop of La Plata o Charcas, Bolivia | 
| 20 Feb |  | Born | Gjergji Junki (Giunchi) † |  | Bishop of Bar (Antivari), Montenegro | 
| 21 Feb | 40.8 | Ordained Bishop | Bernard-Antoine Pizzella † | Titular Bishop of Constantia in Arabia | 
| 22 Feb |  | Born | Francesco Maria Locatelli † |  | Cardinal, Bishop of Spoleto, Italy | 
| 47.6 | Selected | Domingo (Damiano) Polou † | Archbishop of Reggio Calabria, Italy | 
| 23 Feb | 23.4 | Succeeded | Johann Theodor von Bayern † | Bishop of Freising, Germany | Cardinal, Bishop of Regensburg, Germany | 
| 77.3 | Died | Johann Franz von Eckher von Kapfing und Liechteneck † | Bishop of Freising, Germany | 
| 24 Feb | 43.5 | Ordained Priest | Carlo Alberto Guidobono Cavalchini † | Priest | Cardinal, Datary of the Apostolic Datary | 
 | Born | Giacinto Francesco Rolfi, O.E.S.A. † |  | Bishop of Iglesias, Italy | 
| 23.2 | Ordained Priest | Filippo Niccolò Spinelli † | Priest | Bishop of Aversa, Italy | 
| 26 Feb |  | Born | Emmanuel Felix Soares (de Santa Catarina), O.C.D. † |  | Archbishop of Goa, India | 
| 28 Feb |  | Born | Giovanni Nani † |  | Bishop of Brescia, Italy | 
| 6 Mar | 61.1 | Died | Miguel Estela, O.M. † | Bishop of Jaca, Spain | 
| 84.1 | Resigned | Francesco Onofrio Hodierna † | Bishop of Valva e Sulmona, Italy | Bishop Emeritus | 
| 7 Mar |  | Born | Tomás Lorenzana Butrón † |  | Bishop of Gerona, Spain | 
| 8 Mar | 25.1 | Ordained Priest | Franz Anton von Engel in Wagrain † | Priest | Bishop of Csanád, Hungary | 
| 25.0 | Ordained Deacon | Giuseppe Antonio Passanti † | Deacon | Bishop of Montemarano, Italy | 
| 28.0 | Ordained Priest | Zsigmond Antal Sztojka de Sala et Kricsfalva † | Priest | Bishop Emeritus of Transilvania, Erdély, Siebenbürgen, Romania | 
| 9 Mar | 61.3 | Selected | Raimundo Rubí, O. Cart. † | Bishop of Catania, Italy | 
| 10 Mar |  | Died | Raimondo Gallani, O.P. † | Archbishop of Dubrovnik (Ragusa), Croatia | 
| 12 Mar |  | Born | Friedrich Ludwig Franz von Wangen zu Geroldseck † |  | Bishop of Basel, Switzerland | 
| 13 Mar | 59.4 | Resigned | Girolamo Crispi † | Archbishop of Ravenna, Italy | Archbishop of Ferrara, Italy | 
| 40.8 | Resigned | Felipe Itúrbide (Yturibe), O. Carm. † | Bishop of Venosa, Italy | Archbishop Emeritus of Dubrovnik (Ragusa), Croatia | 
| 14 Mar | 30.2 | Ordained Deacon | Bonaventura MacDonnell, O.F.M. † | Deacon of Order of Friars Minor | Bishop of Killala, Ireland | 
| 15 Mar | 84.2 | Died | Jacques de Goyon de Matignon † | Bishop Emeritus of Condom, France | 
| 16 Mar | 49.8 | Ordained Priest | Maffeo Niccolò Farsetti † | Priest | Archbishop of Ravenna, Italy | 
| 56.3 | Ordained Priest | Giacomo Lanfredini † | Priest | Cardinal, Bishop Emeritus of Osimo e Cingoli, Italy | 
| 30.5 | Ordained Bishop | Antonio Nani † | Titular Bishop of Priene | Archbishop of Corfù, Greece | 
| 17 Mar | 52.7 | Succeeded | Pietro Carlo Benedetti † | Bishop of Spoleto, Italy | 
| 39.3 | Appointed | Francesco Girolamo Bona † | Bishop of Trebinje e Mrkan, Bosnia and Herzegovina | Vicar Apostolic of Constantinople, Turkey | 
| 56.8 | Confirmed | Nicola Cani, O.P. † | Bishop of Bosa, Italy | 
| 39.1 | Appointed | Pietro Antonio Corsignani † | Bishop of Venosa, Italy | Bishop of Valva e Sulmona, Italy | 
| 58.2 | Appointed | Tomás Crespo Agüero † | Archbishop of Zaragoza, Spain | 
| 61.6 | Confirmed | Imre Esterházy, O.S.P.P.E. † | Archbishop of Esztergom, Hungary | 
| 49.8 | Appointed | Maffeo Niccolò Farsetti † | Archbishop of Ravenna, Italy | 
| 66.1 | Confirmed | Angelo Galzerin, O.F.M. Conv. † | Bishop of Ampurias e Civita, Italy | 
| 61.2 | Appointed | Bartolome Gascon † | Titular Bishop of Iasus | 
| 46.1 | Appointed | Antonio Saverio Gentili † | Titular Archbishop of Petra in Palaestina | Cardinal, Prefect of the Congregation of the Council | 
| 84.2 | Appointed | Francesco Onofrio Hodierna † | Titular Bishop of Berytus | Bishop Emeritus of Valva e Sulmona, Italy | 
| 46.4 | Appointed | Matteo Odierna, O.S.B. † | Bishop of Valva e Sulmona, Italy | 
| 40.8 | Appointed | Felipe Itúrbide (Yturibe), O. Carm. † | Titular Archbishop of Side | Archbishop Emeritus of Dubrovnik (Ragusa), Croatia | 
| 73.3 | Died | Carlo Giacinto Lascaris, O.P. † | Bishop of Spoleto, Italy | 
| 82.5 | Appointed | Vincenzo Magnati † | Titular Bishop of Megara | 
| 42.8 | Appointed | Juan Francisco Navarro Salvador y Gilabert † | Bishop of Albarracin, Spain | 
| 51.1 | Appointed | Sebastián Lorenzo Pizarro, O.S.Bas. † | Bishop of Puerto Rico (Porto Rico) | 
| 63.3 | Confirmed | Salvatore Ruyu † | Bishop of Ales e Terralba, Italy | 
| 66.1 | Appointed | Paolino Sandulli, O.S.B. † | Titular Bishop of Castoria | 
| 47.0 | Appointed | Tommaso Severi † | Titular Bishop of Tricomia | 
| 40.3 | Appointed | Tomás del Valle, O.P. † | Bishop of Ceuta, Spain | Bishop of Cádiz, Spain | 
| 50.9 | Appointed | Antonio Maria Vantini † | Bishop of Montepulciano, Italy | 
| 23 Mar | 53.1 | Ordained Bishop | Stephan von Clodh (Cloth), O.S.B. † | Titular Bishop of Derbe | Auxiliary Bishop of Fulda, Germany | 
| 46.1 | Ordained Bishop | Antonio Saverio Gentili † | Titular Archbishop of Petra in Palaestina | Cardinal, Prefect of the Congregation of the Council | 
| 28.4 | Ordained Bishop | Michał Ignacy Kunicki † | Titular Bishop of Arsinoë in Arcadia | Auxiliary Bishop of Kraków, Poland | 
 | Born | Francisco Navarro Acevedo † |  | Bishop of Santa Marta, Colombia | 
| 51.0 | Ordained Bishop | Antonio Maria Vantini † | Bishop of Montepulciano, Italy | 
| 25 Mar | 39.1 | Ordained Bishop | Pietro Antonio Corsignani † | Bishop of Venosa, Italy | Bishop of Valva e Sulmona, Italy | 
| 24.7 | Ordained Priest | Teodor Kazimierz Czartoryski † | Priest | Bishop of Poznań, Poland | 
| 46.5 | Ordained Bishop | Matteo Odierna, O.S.B. † | Bishop of Valva e Sulmona, Italy | 
 | Born | Joseph-Marie Paget † |  | Bishop Emeritus of Genève {Geneva}, Switzerland | 
| 66.2 | Ordained Bishop | Paolino Sandulli, O.S.B. † | Titular Bishop of Castoria | 
 | Born | Gabriel Wodzyński † |  | Bishop of Smoleńsk, Poland | 
| 28 Mar | 72.2 | Selected | Manuel Antonio Gómez de Silva † | Bishop of Popayán, Colombia | 
| 29 Mar | 24.8 | Ordained Priest | Wojciech Stanisław Leski, O. Cist. † | Priest of Order of Cistercians | Bishop of Chelmno (Culma, Kulm), Poland | 
| 30 Mar | 47.1 | Ordained Bishop | Tommaso Severi † | Titular Bishop of Tricomia | 
| Apr | 59.1 | Died | Giuseppe Galliani † | Bishop of Sant’Angelo dei Lombardi e Bisaccia, Italy | 
| 1 Apr | 78.5 | Died | Louis-Armand Champion de Cicé † | Vicar Apostolic of Siam, Thailand | 
| 26.2 | Ordained Priest | John O’Brien † | Priest of Cork and Cloyne, Ireland | Bishop of Cloyne and Ross, Ireland | 
| 59.2 | Succeeded | Jean-Jacques Tessier de Quéralay, M.E.P. † | Vicar Apostolic of Siam, Thailand | 
| 4 Apr | 70.2 | Died | Wilhelm von Leslie † | Bishop of Ljubljana (Laybach; Laibach), Slovenia | 
| 5 Apr |  | Born | Vicente Ferreira da Rocha, O.P. † |  | Bishop of Castelo Branco, Portugal | 
| 81.6 | Died | Lorenzo Gherardi † | Bishop of Recanati e Loreto, Italy | 
 | Born | Charles-François-SIméon de Saint-Simon de Vermandois de Rouvroy de Sandricourt † |  | Bishop of Agde, France | 
 | Born | Friedrich Wilhelm von Westphalen † |  | Bishop of Hildesheim, Germany | 
| 6 Apr | 41.9 | Ordained Priest | Giovanni Fabrizio de Capua † | Priest | Archbishop of Salerno, Italy | 
| 7 Apr | 58.2 | Confirmed | John Armstrong † | Bishop of Down and Connor, Ireland | 
| 57.2 | Confirmed | Neal (Nelano) Conway † | Bishop of Derry, Ireland | 
| 47.2 | Confirmed | Bernard MacMahon (McMahon) † | Bishop of Clogher, Ireland | Archbishop of Armagh, Ireland | 
| 63.2 | Confirmed | Teige McCarthy Rabagh † | Bishop of Cork and Cloyne, Ireland | 
| 10 Apr |  | Born | [Jean Joseph Brival] † |  | Bishop of [Corrèze (Constitutional), France] | 
 | Born | José González Laso Santos de San Pedro † |  | Bishop of Plasencia, Spain | 
| 12 Apr | 34.6 | Ordained Priest | Nicola Manciforte † | Priest | Bishop of Ancona e Numana, Italy | 
| 32.6 | Ordained Priest | Alberico Simonetta † | Priest | Bishop of Como, Italy | 
| 14 Apr | 49.9 | Ordained Bishop | Maffeo Niccolò Farsetti † | Archbishop of Ravenna, Italy | 
| 15 Apr |  | Born | Francisco Gabriel de Olivares y Benito † |  | Bishop of Durango, México | 
| 18 Apr |  | Born | Giuseppe de Rosa † |  | Bishop of Policastro, Italy | 
| 23 Apr | 58.4 | Installed | Nicolás Carlos Gómez de Cervantes y Velázquez de la Cadena † | Bishop of Guadalajara, Jalisco, México | 
 | Born | Juan Llano y Ponte † |  | Bishop of Oviedo, Spain | 
| 27 Apr | 29.0 | Ordained Priest | Aleksander Kazimierz Horain † | Priest | Auxiliary Bishop Emeritus of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |