| Date | Age | Event | Bishop | Title | Current Title |
|---|
| unknown | | Appointed | Michele Argelati † | Bishop of Terracina, Priverno e Sezze, Italy | Bishop Emeritus |
| Born | Giacomo Bahtiarian † | Ancira | Archbishop Emeritus of Amida (Diarbekir) (Armenian), Turkey |
| Born | Michele Pietro Bar-Tatar † | Cosroa | Archbishop of Seert (Chaldean), Turkey |
| 42.4 | Appointed | Louis de Belmas † | Bishop of Foreign Diocese | Bishop of Cambrai, France |
| Died | François de Bonnal † | Bishop of Clermont, France |
| Died | James Butler (1st) † | Archbishop Emeritus of Cashel (-Emly), Ireland |
| 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 |
| Born | Aidan Devereaux † | Ferns, Ireland | Vicar Apostolic of Cape of Good Hope, Eastern District {Capo de Buona Speranza, Distretto Orientale}, South Africa |
| Died | Antonio Maria Gardini † | Bishop of Crema, Italy |
| Appointed | Julius-Antoine † | Bishop of Foreign Diocese | Bishop Emeritus |
| Ordained Bishop | Julius-Antoine † | Bishop of Foreign Diocese | Bishop Emeritus |
| Born | Manuel José Mosquera y Arboleda † | | Archbishop of Santafé en Nueva Granada, Colombia |
| Born | Francis George Mostyn † | | Vicar Apostolic of Northern District, England, Great Britain |
| 23.0 | Ordained Priest | Oliver O'Kelly † | Priest | Archbishop of Tuam, Ireland |
| Died | Salvatore Palica † | Bishop of Bisceglie, Italy |
| 55.9 | Appointed | Francesco Maria Pignatelli, Jr. † | Cardinal, Cardinal-Priest of S. Maria in Trastevere |
| 85.5 | Died | Pietro Paolo Tosi † | Bishop of Ferentino, Italy |
| Born | Martinus van der Weijden † | | Prefect of Dutch Guyana-Suriname, Suriname, Antilles |
| Born | Gerardus Petrus Wilmer † | | Bishop of Haarlem, Netherlands |
| 10 Jan | 73.0 | Died | Federico Maria Giovanelli † | Patriarch of Venezia {Venice}, Italy |
| 17 Jan | 53.8 | Died | Rafael de Castello de Vide, O.F.M. † | Bishop of São Tomé e Príncipe |
| 55.9 | Succeeded | Karl Theodor Freiherr von Dalberg † | Bishop of Konstanz {Constance}, Germany | Bishop of Worms, Germany |
| 82.1 | Died | Maximilian Augustinus Christoph Reichsfreiherr von Rodt † | Bishop of Konstanz {Constance}, Germany |
| 75.1 | Died | Peter Michael Vigil Reichsgraf von Thun und Hohenstein † | Bishop of Trento, Italy |
| 18 Jan | 46.6 | Ordained Bishop | Jean-Claude Leblanc de Beaulieu † | Bishop of Foreign Diocese | Bishop Emeritus of Soissons, France |
| 19 Jan | 60.9 | Ordained Bishop | Philipp Franz Wilderich Nepomuk Graf 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 |
| 3 Feb | 62.8 | Died | Juan Félix de Villegas † | Archbishop of Guatemala |
| 9 Feb | 55.8 | Ordained Bishop | Józef Miaskowski † | Bishop of Warszawa, Poland |
| 20 Feb | | Born | Jean-Marie-Mathias Debelay † | Voiriat | Archbishop of Avignon, France |
| 21 Feb | | Born | Louis-Eugène Regnault † | Charleville | Bishop of Chartres, France |
| 22 Feb | 78.0 | Died | Alexander Franz Joseph Graf Engl von und zu Wagrain † | Bishop of Leoben, Austria |
| 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 Barbacci † | Ponzacco | Bishop of Cortona, Italy |
| Ordained Bishop | Jan Jakub Szymonowicz † | Archbishop of Lviv (Armenian), Ukraine |
| 2 Mar | | Born | Domenico Giuseppe de Sousa Magelhaes † | Villa Pouca d'Aguair | Auxiliary Bishop of Lisboa, Portugal |
| 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 | 59.6 | Elected | Barnaba (Gregorio) Chiaramonti, O.S.B. † | Pope (Roma {Rome}, Italy) |
| 17 Mar | | Born | Djorje Dubocovic † | Pitue | Bishop of Hvar (Lesina), Croatia |
| 19 Mar | 24.2 | Ordained Priest | José Hurtado Mendoza † | Priest | Auxiliary Bishop-Elect of Córdoba (Tucumán), Argentina |
| 21 Mar | 59.6 | Installed | Barnaba (Gregorio) Chiaramonti, O.S.B. † | Pope (Roma {Rome}, Italy) |
| 23 Mar | 51.7 | Ordained Priest | Giulio Gabrielli † | Priest | Cardinal, Prelate Emeritus of the Congregation of the Council |
| 26 Mar | 51.1 | Appointed | Georg Karl Ignaz Freiherr von Fechenbach zu Laudenbach † | Coadjutor Bishop of Bamberg, Germany | Bishop of Würzburg, Germany |
| 30 Mar | 55.5 | Ordained Bishop | Michal Franciszek Karpowicz, C.M. † | Bishop of Wigry, Poland |
| 31 Mar | 71.2 | Died | Feliks Paweł Turski † | Bishop of Kraków, Poland |
| Apr | | Appointed | Felice Paoli † | Bishop of Recanati-Loreto, Italy |
| 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 |
| 69.4 | Appointed | Leonardo Antonelli † | Bishop of Porto e Santa Rufina, Italy | Cardinal, Cardinal-Bishop of Ostia |
| 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 S. 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 S. 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 S. Callisto | Cardinal, Bishop of Vercelli, Italy |
| 66.7 | Appointed | Ludovico Flangini Giovanelli † | Cardinal-Priest of S. Marco | Cardinal, Patriarch of Venezia {Venice}, Italy |
| 54.2 | Appointed | József Martonffi † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| 56.1 | Appointed | Alessandro Mattei † | Bishop of Palestrina, Italy | Cardinal, Bishop of Ostia (-Velletri), Italy |
| 37.0 | Appointed | Emanuel Maria Graf 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 | | Died | Joaquim Xavier Botelho de Lima † | Archbishop of Évora, Portugal |
| Born | Dalmazio d’Andrea, O.F.M. Cap. † | Benevento | Bishop of Bova, Italy |
| 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, Québec, Canada | Archbishop of Québec, Québec, Canada |
| 37.1 | Appointed | Joseph-Octave Plessis † | Titular Bishop of Canatha | Archbishop of Québec, Québec, Canada |
| 27 Apr | 62.2 | Ordained Bishop | Teodozy Wislocki, O.S.Bas. † | Bishop of Foreign Diocese |
| 5 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 | Nikolaj Bani † | Archbishop (Personal Title) of Dubrovnik (Ragusa), Croatia |
| 65.1 | Appointed | Ferenc Herzan von Harras † | Cardinal, Bishop of Szombathely, Hungary |
| 15 May | | Born | Giosuè Maria Saggese, C.SS.R. † | Ottajano | Archbishop of Chieti, Italy |
| 18 May | 65.1 | Ordained Bishop | Ferenc Herzan von Harras † | Cardinal, Bishop of Szombathely, Hungary |
| 20 May | | Born | Antoine-Louis-Adolphe Dupuch † | Bordeaux, France | Bishop Emeritus of Alger, Algeria |
| 25 May | 61.6 | Died | Karl Godefried Ritter von Rosenthal † | Auxiliary Bishop of Olomouc, Czech Republic |
| 26 May | 70.6 | Died | Iledfonso Núñez de Haro y Peralta † | Archbishop of México, Federal District |
| 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. † | Bishop of Foreign Diocese |
| 4 Jun | 56.0 | Appointed | Vinzenz Joseph Franz Sales Graf von Schrattenbach † | Bishop of Brno, Czech Republic |
| 6 Jun | | Born | Leo Raymond De Neckère, C.M. † | Wevelghem, Belgium | Bishop of New Orleans, Louisiana, USA |
| 8 Jun | 61.8 | Ordained Bishop | Adeodatus Papikian, C.M.V. † | Bishop of Foreign Diocese |
| 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 |
| 24 Jun | | Born | Johann Alexi † | Maladia | Bishop of Gherla, Armenopoli, Szamos-Ujvár (Romanian), Romania |
| Born | Luigi Moreno † | Mondovi | Bishop of Ivrea, Italy |
| 27 Jun | 78.8 | Died | Giovanni Battista Bussi de Pretis † | Cardinal, Bishop of Jesi, Italy |
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