| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Blasius de Aguinaga † | | Auxiliary Bishop of Lima, Peru |
| 63.0 | Died | Gian Giacomo Amati † | Bishop of Bisignano, Italy |
| Died | Jorge de Ataíde † | Bishop Emeritus of Viseu, Portugal |
| 27.0 | Selected | Jean Jaubert de Barrault † | Bishop of Bazas, France | Archbishop of Arles, France |
| Born | Ludwig Wilhelm Benz † | Kinzheim | Auxiliary Bishop of Eichstätt, Germany |
| 25.0 | Ordained Priest | Benedetto Bragadin, O.F.M. † | Priest of Order of Friars Minor | Archbishop of Corfù, Greece |
| Died | Šimun Bratulić, O.S.P.P.E. † | Bishop of Zagreb (Agram), Croatia |
| 67.0 | Resigned | Giovanni Ambrogio Caccia † | Bishop of Castro [del Lazio], Italy | Bishop Emeritus |
| Died | Nicolò Cannavera † | Bishop of Alghero, Italy |
| Born | Gennaro De Andrea † | Napoli | Bishop of Mottola (Motula), Italy |
| Born | Bernardino d’Aragona † | Carpenzano | Bishop of Bova, Italy |
| Born | Carlo de’ Vecchi † | Siena | Bishop Emeritus of Chiusi, Italy |
| Born | Juan de Esturizada, O.P. † | Cuschen | Bishop of Santa Cruz de la Sierra, Bolivia |
| Died | Andrés Fernández de Córdoba y Carvajal † | Bishop of Badajoz, Spain |
| Born | Pier Francesco Filonardi † | Verulan | Bishop of Anagni, Italy |
| Born | Stefano de Gaspare † | Dyrrachien | Bishop of Sapë, Albania |
| Resigned | Raffaele Inviziati † | Bishop of Cefalonia e Zante, Greece | Bishop Emeritus |
| Appointed | Maciej Konopacki † | Bishop of Chelmno (Culma, Kulm), Poland |
| 48.0 | Died | Livio Limatola † | Bishop of Bitetto, France |
| Born | Francisco López Urraca, O.S.A. † | Caesaraugustan | Bishop of Barbastro, Spain |
| 34.8 | Resigned | Éric de Lorraine † | Bishop of Verdun, France | Bishop Emeritus |
| Died | Paolo Manara, O.P. † | Bishop of Acerno, Italy |
| Born | Flaminio Marcellino † | Roma | Bishop of Cesena, Italy |
| Appointed | Giulio Masi † | Bishop of Giovinazzo, Italy | Bishop of Monopoli, Italy |
| Resigned | Giambattista Milani, C.R. † | Bishop of Bergamo, Italy | Bishop Emeritus |
| 49.0 | Resigned | Giovanni Garzia Millini † | Bishop of Imola, Italy | Cardinal, Cardinal-Bishop of Frascati |
| Born | Édouard Molé † | Paris | Bishop of Bayeux, France |
| Born | Felice Antonio Monaco † | Cusentin | Bishop of Martirano (Martoranum), Italy |
| Born | Jacques Montrouge † | Paris | Bishop of Saint-Flour, France |
| Born | Carlo Nembrini † | Anconae | Bishop of Parma, Italy |
| Died | Agostino Quinzio, O.P. † | Bishop of Massa Lubrense, Italy |
| 41.0 | Died | Raphael Riva (Ripa), O.P. † | Bishop of Chioggia, Italy |
| 38.0 | Resigned | Sebastiano o Settimio Roberti (-Vittori) † | Bishop of Tricarico, Italy | Bishop Emeritus |
| 55.0 | Died | Giuseppe Saladino † | Bishop of Siracusa, Italy |
| Born | Pedro Sanches Farinha † | Lisbonne, Portugal | Bishop of Angola e Congo, Angola |
| Born | Hieronim Wladysław Sanguszko † | | Bishop of Smoleńsk, Poland |
| 59.8 | Resigned | Giulio Sansedoni † | Bishop of Grosseto, Italy | Bishop Emeritus |
| 62.0 | Died | Giovanni Sauli (Scali, Sacchi), O.P. † | Bishop of Aleria, France |
| Born | Antonius Serra † | Chien | Bishop of Milos (Melos), Greece |
| 23.0 | Ordained Priest | Wolther Heinrich von Strevesdorff † | Priest of Mainz, Germany | Auxiliary Bishop |
| 45.0 | Appointed | Michelangelo Tonti † | Archpriest of the Basilica di Santa Maria Maggiore {Saint Mary Major Basilica} | Cardinal, Archbishop (Personal Title) of Cesena, Italy |
| 24.8 | Ordained Priest | Juan Velasco Acevedo † | Priest | Bishop of Orense, Spain |
| Jan | | Died | Jean Miraeus (Le Mire) † | Bishop of Antwerpen {Antwerp, Anvers}, Belgium |
| 1 Jan | | Died | Miguel Ares Canaval † | Bishop of Orense, Spain |
| 2 Jan | 33.2 | Selected | Ferdinand von Bayern † | Coadjutor Bishop of Hildesheim, Germany | Archbishop-Elect of Köln {Cologne}, Germany |
| 6 Jan | 78.8 | Died | St. Juan de Ribera † | Archbishop of Valencia, Spain |
| 10 Jan | | Died | Francisco Arévalo de Zuaco † | Bishop of Gerona, Spain |
| 15 Jan | 51.0 | Died | Gérard de Robin, O.S.A. † | Bishop of Lodève, France |
| 19 Jan | 51.0 | Appointed | Juan (Giovanni) de Espila (Spilla), O.P. † | Archbishop of Acerenza e Matera, Italy |
| 21 Jan | 73.1 | Died | Mariano Pierbenedetti † | Cardinal, Cardinal-Bishop of Frascati |
| 24 Jan | 41.1 | Appointed | Petrus Bastoni † | Bishop of Umbriatico (Umbriaticum), Italy |
| 61.6 | Appointed | Francesco Maria Bourbon Del Monte Santa Maria † | Cardinal-Priest of Santa Maria in Trastevere | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 63.1 | Died | Mateo Burgos Moraleja, O.F.M. † | Bishop of Sigüenza, Spain |
| Appointed | Luigi de Franchis, C.R. † | Bishop of Nardò, Italy |
| Appointed | Ettore Gironda † | Bishop of Massa Lubrense, Italy |
| 36.1 | Appointed | Nicolaus Lesdos (Ludosius) † | Bishop of Milos (Melos), Greece | Bishop Emeritus |
| 48.1 | Appointed | Ottavio Mancini † | Bishop of Cavaillon, France | Bishop Emeritus |
| 63.1 | Appointed | Giovanni Evangelista Pallotta † | Cardinal-Bishop of Frascati | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 76.1 | Appointed | Gregorio Petrocchini, O.S.A. † | Cardinal-Priest of San Lorenzo in Lucina | Cardinal, Cardinal-Bishop of Palestrina |
| Born | Juan de Sancto Mathía Sáenz de Mañozca y Murillo † | México | Bishop of Guatemala (Santiago de Guatemala), Guatemala |
| 30 Jan | | Ordained Bishop | Hermann Ottemberg † | Bishop of Arras, France |
| 31 Jan | 45.1 | Appointed | Lodovico Martini † | Bishop of Aosta, Italy |
| 47.1 | Appointed | Mario Orsini † | Bishop of Bisignano, Italy | Bishop of Tivoli, Italy |
| 56.1 | Appointed | Alessandro Rossi † | Bishop of Castro [del Lazio], Italy | Bishop of Parma, Italy |
| 31.1 | Appointed | Girolamo Sarriano, C.R. † | Bishop of Vico Equense, Italy |
| Feb | | Born | Felipe Fernandez de Pardo, O.P. † | Valladolid, Spain | Archbishop of Manila, Philippines |
| 3 Feb | 58.6 | Died | Ottaviano Paravicini † | Cardinal, Bishop Emeritus of Alessandria (della Paglia), Italy |
| 6 Feb | 41.1 | Ordained Bishop | Petrus Bastoni † | Bishop of Umbriatico (Umbriaticum), Italy |
| 51.1 | Ordained Bishop | Juan (Giovanni) de Espila (Spilla), O.P. † | Archbishop of Acerenza e Matera, Italy |
| Ordained Bishop | Jean Wischer † | Bishop of Ypres (Ieper), Belgium |
| 20 Feb | 37.6 | Ordained Bishop | Guillaume Le Gouverneur † | Bishop of Saint-Malo, France |
| 21 Feb | | Appointed | Tomás Dávalos de Aragón † | Titular Patriarch of Antiochia {Antioch} |
| 50.1 | Appointed | Jeronimo Quintanilla, O. Cist. † | Bishop of São Tomé e Príncipe |
| 24 Feb | 56.1 | Ordained Bishop | Alessandro Rossi † | Bishop of Castro [del Lazio], Italy | Bishop of Parma, Italy |
| 28 Feb | 35.2 | Appointed | Pedro de Mata y Haro, C.R. † | Bishop of Capaccio, Italy |
| Mar | | Born | Giacomo Buoni † | Abbatiac Thedaldorum | Bishop of Nepi e Sutri, Italy |
| 14 Mar | | Appointed | Theodorus Dedo, O.P. † | Bishop of Korčula (Curzola, Cursola), Croatia |
| Appointed | Erasmo Paravicini † | Bishop of Alessandria (della Paglia), Italy |
| 43.2 | Appointed | Andrea Pierbenedetti † | Bishop of Venosa, Italy |
| 16 Mar | | Born | Francisco de Rois y Mendoza, O. Cist. † | Madrid | Archbishop of Granada, Spain |
| 20 Mar | 43.2 | Ordained Bishop | Andrea Pierbenedetti † | Bishop of Venosa, Italy |
| Apr | | Born | Francesco Antonio Gallo † | Latertiae | Bishop of Bitonto, Italy |
| 1 Apr | | Died | Antonio Maria Graziani † | Bishop of Amelia, Italy |
| 2 Apr | 24.4 | Ordained Priest | Johann Fiernhammer † | Priest of Freising, Germany | Auxiliary Bishop |
| 3 Apr | | Died | Vittorino Mansi, O.S.B. † | Bishop of Ariano, Italy |
| 6 Apr | 66.3 | Died | Alessio Geromoaddi † | Bishop of Isernia, Italy |
| 8 Apr | | Appointed | Pedro Manrique, O.S.A. † | Archbishop of Zaragoza, Spain |
| 10 Apr | | Ordained Bishop | Erasmo Paravicini † | Bishop of Alessandria (della Paglia), Italy |
| 11 Apr | | Appointed | Domenico de’ Marini † | Bishop of Albenga, Italy | Archbishop of Genova, Italy |
| 14 Apr | | Born | Ferdinando Tiberius Gonzaga † | Cremonen | Bishop of Mantova, Italy |
| 18 Apr | 50.3 | Appointed | Sebastião de Ascensão, O.P. † | Bishop of Santiago de Cabo Verde |
| 46.0 | Appointed | Giovanni Emo † | Bishop of Bergamo, Italy |
| 51.3 | Appointed | Valerianus Łubieniecki, O.F.M. † | Bishop of Bacău, Romania |
| Appointed | Pietro de Marchi, O.P. † | Bishop of Santorini {Thira}, Greece | Archbishop of Izmir (Smirne), Turkey |
| 41.3 | Appointed | Giovanni Francesco Murta (de Mirto), C.R. † | Bishop of Aleria, France |
| 21 Apr | | Born | Carlo Carafa della Spina, C.R. † | Rome | Cardinal, Bishop Emeritus of Aversa, Italy |
| 1 May | 41.3 | Ordained Bishop | Giovanni Francesco Murta (de Mirto), C.R. † | Bishop of Aleria, France |
| 2 May | | Appointed | Giovanni de Clèves, C.R.S.A. † | Titular Bishop of Bethleem |
| 18 May | 33.6 | Confirmed | Ferdinand von Bayern † | Coadjutor Bishop of Hildesheim, Germany | Archbishop-Elect of Köln {Cologne}, Germany |
| 35.4 | Appointed | Antonio Maria Franceschini † | Bishop of Amelia, Italy |
| 50.4 | Appointed | Giulio Mattei † | Bishop of Bitetto, France |
| 37.4 | Appointed | Pietro Valier † | Titular Bishop of Famagusta | Cardinal, Bishop of Padova {Padua}, Italy |
| 19 May | | Born | Bl. Benedetto Odescalchi † | Como | Pope (Roma {Rome}, Italy) |
| Appointed | Jacques van den Borgh † | Bishop of Roermond, Netherlands |
| 24 May | 46.1 | Ordained Bishop | Giovanni Emo † | Bishop of Bergamo, Italy |
| 25 May | 27.4 | Confirmed | Jean Jaubert de Barrault † | Bishop of Bazas, France | Archbishop of Arles, France |
| 50.4 | Appointed | Jeronimo de Carcamo † | Bishop of Trujillo, Peru |
| 47.8 | Appointed | Jean Marie Malderus (van Malderen) † | Bishop of Antwerpen {Antwerp, Anvers}, Belgium |
| 27 May | 32.4 | Ordained Priest | Vincenzo Martena † | Priest | Bishop of Senj, Croatia |
| 28 May | 37.6 | Ordained Priest | Jacques Boonen † | Priest | Archbishop of Mechelen, Belgium |
| 30 May | | Appointed | Juan Avellaneda Manrique † | Auxiliary Bishop of Toledo, Spain |
| 40.4 | Appointed | Johannes Streck † | Auxiliary Bishop of Speyer, Germany |
| 40.4 | Appointed | Johannes Streck † | Titular Bishop of Daulia | Auxiliary Bishop of Speyer, Germany |
| 7 Jun | 40.6 | Died | Cornelius Gobelius † | Auxiliary Bishop of Mainz, Germany |
| 13 Jun | 46.2 | Appointed | Isidoro Aliaga, O.P. † | Bishop of Tortosa, Spain | Archbishop of Valencia, Spain |
| 19 Jun | 35.5 | Ordained Bishop | Antonio Maria Franceschini † | Bishop of Amelia, Italy |
| 26 Jun | 50.5 | Ordained Bishop | Sebastião de Ascensão, O.P. † | Bishop of Santiago de Cabo Verde |
| 27 Jun | | Appointed | Rodolfo Paleotti † | Bishop of Imola, Italy |
| 38.5 | Appointed | Antonio Ricci † | Bishop of Arezzo, Italy |
| 28 Jun | | Died | Marcus Lyresius † | Auxiliary Bishop of Eichstätt, Germany |