| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 25.2 | Ordained Priest | Severo Leonardo Andriani Escofet † | Priest | Bishop of Pamplona (-Tudela), Spain |
| Born | Giacomo Bahtiarian † | Ancira | Bishop Emeritus of the Tribunal of Diarbekir (Amida) (Armenian) |
| Born | Pierre-Michel Bar-Tatar † | Cosroa | Archbishop of Seert (Chaldean), Turkey |
| Born | John Brady † | Castletara, Ireland | Bishop of Perth, Australia |
| Died | James Butler (1st) † | Archbishop Emeritus of Cashel (-Emly), Ireland |
| Born | Patrick Joseph Carew † | Waterford, Ireland | Vicar Apostolic of Western Bengal, India |
| Died | Marcello Cortenovis, B. † | Vicar Apostolic of Ava e Pegù, Myanmar |
| Born | Jean-Pierre Dalmond, C.S.Sp. † | Cambien | Prefect of Madagascar, Madagascar |
| 23.0 | Ordained Priest | Diego de Aranda y Carpinteiro † | Priest | Bishop of Guadalajara, Jalisco, México |
| 55.4 | Appointed | Giulio Maria della Somaglia † | Prefect of the Congregation of Rites | Cardinal, Archivist of the Vatican Secret Archives |
| Appointed | Julius-Antoine † | Bishop of Diarbekir (Amida) (Syrian), Turkey | Bishop Emeritus |
| Ordained Bishop | Julius-Antoine † | Bishop of Diarbekir (Amida) (Syrian), Turkey | Bishop Emeritus |
| Born | Francis George Mostyn † | | Vicar Apostolic of Northern District, England, Great Britain |
| 23.0 | Ordained Priest | Oliver O’Kelly † | Priest | Archbishop of Tuam, Ireland |
| 68.8 | Died | Salvatore Palica, O.S.B. † | Bishop of Bisceglie, Italy |
| 25.7 | Ordained Priest | Juan Antonio Rivadeneyra † | Priest | Bishop of Valladolid, Spain |
| 22.2 | Ordained Priest | Rafael Manuel José Benito de Vélez Téllez, O.F.M. Cap. † | Priest of Order of Friars Minor Capuchin | Archbishop of Santiago de Compostela, Spain |
| Born | Martinus van der Weijden † | | Prefect of Dutch Guyana-Suriname, Suriname, Antilles |
| 60.5 | Died | Jean-Denis de Vienne † | Auxiliary Bishop of Lyon, France |
| 1 Jan | 62.2 | Died | Vincenzo Lupoli † | Bishop of Telese o Cerreto Sannita, Italy |
| 3 Jan | 71.0 | Died | Cristian Saverio Cristiani, O.S.A. † | Titular Bishop of Porphyreon |
| 10 Jan | 73.0 | Died | Federico Maria Giovanelli † | Patriarch of Venezia {Venice}, Italy |
| 16 Jan | 25.6 | Ordained Priest | Juan José Cabarcas González y Argüello † | Priest | Bishop of Panamá |
| 17 Jan | 53.8 | Died | Rafael de Castello de Vide, O.F.M. † | Bishop of São Tomé e Príncipe |
| 55.9 | Succeeded | Karl Theodor von Dalberg † | Bishop of Konstanz {Constance}, Germany | Bishop of Worms, Germany |
| 82.1 | Died | Maximilian Augustinus Christoph von Rodt † | Bishop of Konstanz {Constance}, Germany |
| 75.1 | Died | Peter Michael Vigil von Thun und Hohenstein † | Bishop of Trento, Italy |
| 18 Jan | 46.6 | Ordained Bishop | Jean-Claude Leblanc de Beaulieu † | Bishop | Bishop Emeritus of Soissons, France |
| 19 Jan | 60.9 | Ordained Bishop | Philipp Franz Wilderich Nepomuk von Walderdorf † | Bishop of Speyer, Germany |
| 28 Jan | 54.2 | Died | Juan Antonio de la Virgen María (Viana), O.C.D. † | Bishop of Almería, Spain |
| 1 Feb | | Born | Luigi Margarita, C.M. † | Francavilla | Bishop of Oria, Italy |
| 2 Feb | 24.8 | Ordained Deacon | Franciszek di Paolo Pawłowski † | Deacon | Bishop of Płock, Poland |
| 3 Feb | 62.8 | Died | Juan Félix de Villegas † | Archbishop of Guatemala |
| 9 Feb | 55.8 | Ordained Bishop | Józef Miaskowski † | Bishop of Warszawa, Poland |
| 10 Feb | 75.2 | Died | Vincenzo Maria Altieri † | |
| 18 Feb | 25.5 | Ordained Deacon | Santiago José O’ Phelan Recabarren † | Deacon of Arequipa, Peru | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 20 Feb | | Born | Jean-Marie-Mathias Debelay † | Voiriat | Archbishop of Avignon, France |
| 21 Feb | 25.5 | Ordained Priest | Santiago José O’ Phelan Recabarren † | Priest of Arequipa, Peru | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| Born | Louis-Eugène Regnault † | Charleville | Bishop of Chartres, France |
| 22 Feb | 78.0 | Died | Alexander Franz Joseph Engl von und zu Wagrain † | Bishop of Leoben, Austria |
| 23 Feb | | Born | Matthias Majercsak † | Ofalu | Titular Bishop of Ierichus |
| 24 Feb | | Born | Giuseppe Maria Vespignani † | Roma | Bishop of Orvieto, Italy |
| 25 Feb | | Born | Jean Marie (John Mary) Odin, C.M. † | Ambierle, France | Archbishop of New Orleans, Louisiana, USA |
| 26 Feb | | Born | John Baptist Purcell † | Mallow, Ireland | Archbishop of Cincinnati, Ohio, USA |
| 1 Mar | | Born | Feliciano (Laurentius Joachim) Barbacci, O.F.M. † | Ponzacco | Bishop of Cortona, Italy |
| 60.2 | Ordained Bishop | Jan Jakub Szymonowicz † | Archbishop of Lviv (Armenian), Ukraine |
| 6 Mar | | Died | Charles O’Reilly † | Bishop of Kilmore, Ireland |
| 8 Mar | 23.1 | Ordained Priest | José Vicente de Unda † | Priest | Bishop of Mérida, Venezuela |
| 24.0 | Ordained Priest | Pablo García Abella, C.O. † | Priest of Confederation of Oratorians of St. Philip Neri | Archbishop of Valencia, Spain |
| 9 Mar | 22.8 | Ordained Priest | Vinzenz Eduard Milde † | Priest of Wien {Vienna}, Austria | Archbishop |
| 14 Mar | 57.6 | Elected | Barnaba (Gregorio) Chiaramonti, O.S.B. † | Pope (Roma {Rome}, Italy) |
| 17 Mar | | Born | Djorje Duboković (Dubocovich) † | Pitve | Bishop of Hvar (Lesina), Croatia |
| 19 Mar | 23.2 | Ordained Priest | José Hurtado de Mendoza † | Priest | Auxiliary Bishop-Elect of Córdoba (Tucumán), Argentina |
| 21 Mar | 57.6 | Installed | Barnaba (Gregorio) Chiaramonti, O.S.B. † | Pope (Roma {Rome}, Italy) |
| 23 Mar | 51.7 | Ordained Priest | Giulio Gabrielli † | Priest | Cardinal, Prefect Emeritus of the Congregation of the Council |
| 29 Mar | 24.1 | Ordained Priest | Filippo Martuscelli † | Priest | Bishop of Muro Lucano, Italy |
| 22.3 | Ordained Priest | Angelo Maria Scanzano † | Priest | Bishop of Castellammare di Stabia, Italy |
| 30 Mar | 55.5 | Ordained Bishop | Michal Franciszek Karpowicz, C.M. † | Bishop of Wigry, Poland |
| 31 Mar | 85.8 | Died | Pietro Paolo Tosi † | Bishop of Ferentino, Italy |
| 71.2 | Died | Feliks Paweł Turski † | Bishop of Kraków, Poland |
| 1 Apr | 63.8 | Died | Juan Francisco Jiménez del Río † | Archbishop of Valencia, Spain |
| Born | Salvatore Leziroli † | Imola | Bishop of Rimini, Italy |
| 2 Apr | 69.4 | Appointed | Leonardo Antonelli † | Cardinal-Bishop of Porto e Santa Rufina | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 69.4 | Appointed | Leonardo Antonelli † | Bishop of Porto e Santa Rufina, Italy | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 68.6 | Appointed | Giovanni Andrea Archetti † | Cardinal-Bishop of Sabina | Cardinal, Bishop of Ascoli Piceno, Italy |
| 46.7 | Appointed | Romoaldo Braschi-Onesti † | Cardinal-Deacon of Santa Maria ad Martyres | Cardinal, Archpriest of the Basilica di San Pietro in Vaticano {Saint Peter Basilica} |
| 51.0 | Appointed | Antonio Maria Doria Pamphilj † | Cardinal-Deacon of Santa Maria in Via Lata | Cardinal, Archpriest of the Basilica di Santa Maria Maggiore {Saint Mary Major Basilica} |
| 75.8 | Installed | Carlo Giuseppe Filippa della Martiniana † | Cardinal-Priest of San Callisto | Cardinal, Bishop of Vercelli, Italy |
| 66.7 | Appointed | Ludovico Flangini Giovanelli † | Cardinal-Priest of San Marco | Cardinal, Patriarch of Venezia {Venice}, Italy |
| 54.2 | Confirmed | József Mártonfi † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| 56.1 | Appointed | Alessandro Mattei † | Cardinal-Bishop of Palestrina | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 59.0 | Appointed | Joseph-Barthélemy Menocchio, O.S.A. † | Titular Bishop of Porphyreon |
| 56.1 | Appointed | Francesco Maria Pignatelli (Jr.) † | Cardinal, Cardinal-Priest of Santa Maria in Trastevere |
| 37.0 | Selected | Emanuel Maria Thun † | Bishop of Trento, Italy |
| 3 Apr | 75.6 | Died | Cayetano Antonio Cuadrillero Mota † | Bishop of León, Spain |
| 8 Apr | 78.3 | Died | Andrea Gioannetti, O.S.B. † | Cardinal, Archbishop of Bologna, Italy |
| 10 Apr | 83.0 | Died | Joaquim Xavier Botelho de Lima † | Archbishop of Évora, Portugal |
| Born | Dalmazio d’Andrea, O.F.M. Cap. † | Benevento | Bishop of Bova, Italy |
| 11 Apr | | Born | Manuel José Mosquera y Arboleda † | Popayán | Archbishop of Santafé en Nueva Granada, Colombia |
| 12 Apr | 25.0 | Ordained Priest | Franciszek di Paolo Pawłowski † | Priest | Bishop of Płock, Poland |
| 21 Apr | | Born | Anselmo Llorente y La Fuente † | Cartago | Bishop of San José de Costa Rica |
| 22 Apr | | Born | Giuseppe Maria Bovieri † | Ceccano | Bishop of Montefiascone, Italy |
| 26 Apr | 37.1 | Appointed | Joseph-Octave Plessis † | Coadjutor Bishop of Québec, Canada | Archbishop of Québec, Canada |
| 37.1 | Appointed | Joseph-Octave Plessis † | Titular Bishop of Canatha | Archbishop of Québec, Canada |
| 27 Apr | 62.2 | Ordained Bishop | Teodozy Wislocki, O.S.B.M. † | Bishop of Suprasl (Ukrainian), Belarus |
| 1 May | | Born | Bonifacio Cajani † | Gualdo Tadino | Bishop of Cagli e Pergola, Italy |
| 8 May | | Died | John Butler † | Bishop Emeritus of Cork, Ireland |
| 10 May | 76.2 | Died | Felipe Antonio Solano Marín † | Bishop of Cuenca, Spain |
| 12 May | 64.1 | Appointed | Nikola Bani (Ban) † | Archbishop of Dubrovnik (Ragusa), Croatia |
| 65.1 | Confirmed | Franziskus von Paula Herzan von Harras † | Cardinal, Bishop of Szombathely, Hungary |
| 62.0 | Appointed | Felice Paoli † | Bishop of Recanati e Loreto, Italy |
| 15 May | | Born | Giosuè Maria Saggese, C.SS.R. † | Ottaviano | Archbishop of Chieti, Italy |
| 16 May | | Born | Angelo Parsi, C.P. † | Civitavecchia | Vicar Apostolic of Valachia, Romania |
| 18 May | 65.1 | Ordained Bishop | Franziskus von Paula Herzan von Harras † | Cardinal, Bishop of Szombathely, Hungary |
| 20 May | 63.6 | Died | Joseph-Anne-Luc Falcombelle de Ponte d’Albaret † | Bishop of Sarlat, France |
| 21 May | | Born | Antoine-Louis-Adolphe Dupuch † | Bordeaux, France | Bishop Emeritus of Alger, Algeria |
| 25 May | 61.6 | Died | Karl Godefried von Rosenthal † | Auxiliary Bishop of Olomouc, Czech Republic |
| 26 May | 70.6 | Died | Iledfonso Núñez de Haro y Peralta † | Archbishop of México, Federal District |
| 29 May | 70.6 | Died | Andrea Cardamone † | Archbishop of Rossano, Italy |
| 30 May | | Born | Henri-Marie-Gaston Boisnormand de Bonnechose † | Paris | Cardinal, Archbishop of Rouen, France |
| 31 May | 30.4 | Appointed | Nicholas Joseph Archdeacon † | Bishop of Kilmacduagh, Ireland |
| 61.8 | Appointed | Adeodatus Papikian, C.M.V. † | Titular Bishop of Ejmiacin |
| 2 Jun | 54.6 | Selected | Giuseppe Francesco Maria Ferraris da Genola † | Bishop of Saluzzo, Italy |
| 4 Jun | 56.0 | Selected | Vinzenz Joseph Franz Sales von Schrattenbach † | Bishop of Brno, Czech Republic |
| 7 Jun | 23.4 | Ordained Priest | Dominico Angelini † | Priest | Auxiliary Bishop of Sabina (-Farfa), Italy |
| Born | Leo Raymond De Neckère, C.M. † | Wevelghem, Belgium | Bishop of New Orleans, Louisiana, USA |
| 23.0 | Ordained Priest | Ângelo de Nossa Senhora da Boa-Morte, O.F.M. † | Priest of Order of Friars Minor | Bishop of Elvas, Portugal |
| 33.9 | Ordained Priest | Giovanni Giacomo Sinibaldi † | Priest | President of Pontifical Ecclesiastical Academy, Roman Curia |
| 24.8 | Ordained Priest | Annibale Tommasi † | Priest | Bishop of Sansepolcro (Borgo San Sepolcro), Italy |
| 8 Jun | 61.8 | Ordained Bishop | Adeodatus Papikian, C.M.V. † | Titular Bishop of Ejmiacin |
| 22.9 | Ordained Priest | Ignaz Franz Sales Zimmermann † | Priest of Lavant, Slovenia | Bishop |
| 23 Jun | | Born | José António da Mata e Silva † | Castelo Branco | Archbishop of Évora, Portugal |
| Born | Luigi Moreno † | Mallare | Bishop of Ivrea, Italy |
| 24 Jun | | Born | Ioan Alexi † | Maladia | Bishop of Gherla, Armenopoli, Szamos-Ujvár (Romanian), Romania |
| 23.2 | Ordained Deacon | Bl. Johann Nepomuk von Tschiderer zu Gleitheim † | Deacon | Bishop of Trento, Italy |
| 27 Jun | 78.8 | Died | Giovanni Battista Bussi de Pretis † | Cardinal, Bishop of Jesi, Italy |
| 29 Jun | 79.4 | Died | Francesco Maria Sorgo Bobali, O.F.M. † | Bishop of Stagno (Ston), Croatia |