Date | Age | Event | Bishop | Title | Current Title |
unknown | | Died | Antonello , O.F.M. † | Bishop of Andria-Montepeloso, Italy |
| Died | Jean de Arcadia † | Bishop of Cefalonia e Zante, Greece |
| Died | Daniele di Arluno, C.R.S.A. † | Bishop of Forli, Italy |
| Died | Marliano Baccarini † | Bishop of Bobbio, Italy |
| Died | Sigurd Bjørnsson † | Bishop of Stavanger, Norway |
| Born | Heinrich Bokhold (Bokholt) † | | Bishop of Lübeck, Germany |
| Born | Niccolò Bonafede † | | Bishop of Chiusi, Italy |
| Died | Donato Bottini, O.E.S.A. † | Bishop of Valva e Sulmona, Italy |
| Resigned | Ambroise de Cameraco † | Bishop of Alet, France | Bishop Emeritus |
| Died | Pál de Chomystra † | Bishop of Bosnia (Bosna, Diacovar, Diakovar), Croatia |
| Died | Marco Cobello † | Bishop of Castro [del Lazio], Italy |
| Resigned | Francesco de Copponis † | Bishop of Terni, Italy | Bishop Emeritus |
| Resigned | João da Costa † | Bishop of Lamego, Portugal | Bishop Emeritus |
| Died | Arnaud-Raymond d’Espagne † | Bishop of (Saint-Bertrand de) Comminges, France |
| Appointed | Georg von Haugwitz † | Bishop of Naumburg, Germany |
| Appointed | Jean † | Bishop of Saint-Pons-de-Thomières, France |
| Died | Jean † | Bishop of Tarbes, France |
| Born | Jan Latalski † | | Archbishop of Gniezno, Poland |
| Appointed | Guillaume Le Bas † | Titular Bishop of Abelon |
| Died | Eustache de Lévis † | Bishop of Mirepoix, France |
| Died | Thaddeus MacRaith † | Bishop of Killaloe, Ireland |
| Resigned | Cornelius O’Cunlis, O.F.M. † | Bishop of Clonfert, Ireland | Bishop Emeritus |
| Died | Bartholomew O’Flanagan, O. Cist. † | Bishop of Derry, Ireland |
53.0 | Appointed | Latino Orsini † | Archpriest of the Arcibasilica di San Giovanni in Laterano {Saint John Lateran Basilica} | Cardinal, Archbishop of Taranto, Italy |
| Born | Girolamo Pallavicini † | | Bishop Emeritus of Novara, Italy |
| Died | Álvaro Pérez Osorio † | Bishop of Astorga, Spain |
| Died | Jacques Radulphi Dupont † | Bishop of Sisteron, France |
| Born | Thomas Savage † | | Archbishop of York, England, Great Britain |
| Died | Antonio Scorbillo † | Bishop of Mileto, Italy |
| Appointed | Louis Seguin † | Auxiliary Bishop of Maillezais, France |
| Appointed | Louis Seguin † | Titular Bishop of Megara | Auxiliary Bishop of Maillezais, France |
| Died | Juan Soler † | Bishop of Barcelona, Spain |
| Appointed | Pierre Sorelli, O.S.B. † | Auxiliary Bishop of Albi, France |
| Appointed | Pierre Sorelli, O.S.B. † | Titular Bishop of Laodicea in Syria | Auxiliary Bishop of Albi, France |
| Resigned | James Stewart † | Bishop of Moray, Scotland, Great Britain | Bishop Emeritus |
| Died | Gioacchino Suhare † | Bishop of Cassano all’Jonio, Italy |
| Died | Théobald Sweinpeck † | Bishop of Lavant, Slovenia |
| Died | Antonio de Teramo † | Bishop of Boiano, Italy |
| Appointed | Fantino de Valle † | Bishop of Scardona (Skradin), Croatia |
| Died | Thomas de Venezia, O.P. † | Bishop of Hvar (Lesina), Croatia |
| Died | João Vicente, C.R.S.J.E. † | Bishop of Viseu, Portugal |
| Born | John Young † | | Auxiliary Bishop of London, England, Great Britain |
7 Jan | | Resigned | Giovanni Chinugi † | Bishop of Chiusi, Italy | Bishop of Pienza e Montalcino, Italy |
| Appointed | Gabriele Piccolomini, O.F.M. † | Bishop of Chiusi, Italy |
13 Jan | | Appointed | Thomas de Debrenthe (Branche), O.S.B. † | Bishop of Nitra, Slovakia |
14 Jan | | Confirmed | Burkhard von Randegg † | Bishop of Konstanz {Constance}, Germany |
| Appointed | Giovanni Paolo Vassalli † | Bishop of Potenza, Italy | Bishop of Aversa, Italy |
17 Jan | | Born | Antoine du Prat † | | Cardinal, Archbishop of Sens, France |
24 Jan | | Appointed | Jan Łesowicz † | Bishop of Lutsk (Łuck), Ukraine | Bishop of Vilnius, Lithuania |
26 Jan | | Appointed | Andrea Tolomei † | Bishop of Siracusa, Italy |
75.0 | Appointed | Juan de Torquemada, O.P. † | Bishop of Orense, Spain | Cardinal, Cardinal-Bishop of Sabina |
28 Jan | 63.0 | Died | Paweł Giżycki † | Bishop of Płock, Poland |
| Resigned | Thomas Knight, O.P. † | Bishop of Saint Asaph, Wales, Great Britain | Bishop Emeritus |
30 Jan | | Appointed | Petruccio de Migliolo † | Bishop of Lacedonia, Italy |
31 Jan | | Selected | Gerald Fitzgerald † | Bishop of Cork and Cloyne, Ireland | Bishop Emeritus |
Feb | | Died | Alessandro Stampetti † | Bishop of Faenza, Italy |
7 Feb | | Appointed | Tommaso Malumbra † | Bishop of Stagno (Ston) et Curzola (Korcula), Croatia |
8 Feb | | Appointed | Nicolas degli Inversi, O.S.M. † | Bishop of Chioggia, Italy |
9 Feb | | Appointed | Oberto Pinelli † | Bishop of Nebbio, France |
10 Feb | | Appointed | Nicolas de Crucibus † | Bishop of Hvar (Lesina), Croatia |
11 Feb | 77.1 | Appointed | Pierre de Foix (Sr.), O.F.M. † | Administrator of Tarbes, France | Cardinal, Administrator of Lescar, France |
14 Feb | 78.1 | Died | Dietrich von Moers † | Archbishop of Köln {Cologne}, Germany |
21 Feb | 33.1 | Selected | Simon zur Lippe † | Bishop of Paderborn, Germany |
27 Feb | | Died | Vasco Perdigão † | Bishop of Évora, Portugal |
28 Feb | | Appointed | Francesco † | Bishop of Capaccio, Italy |
3 Mar | 46.1 | Appointed | Jean André de Bussi (Bossi) † | Bishop of Acci (Accia), France | Bishop of Aleria, France |
4 Mar | | Appointed | Antonio Probi † | Bishop of Penne e Atri, Italy |
6 Mar | 57.1 | Appointed | Jorge da Costa, O. Cist. † | Bishop of Évora, Portugal | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
8 Mar | | Confirmed | Birger Månsson † | Bishop of Västerås (Westeraes), Sweden |
14 Mar | | Appointed | Jean de Lescar † | Archbishop of Auch, France |
18 Mar | | Died | Pietro degli Scaleri † | Bishop of Bovino, Italy |
24 Mar | 53.2 | Died | Prospero Colonna † | Cardinal, Cardinal-Deacon of San Giorgio in Velabro |
77.2 | Resigned | Pierre de Foix (Sr.), O.F.M. † | Administrator of Arles, France | Cardinal, Administrator of Lescar, France |
27.3 | Appointed | Philippe de Lévis † | Cardinal, Archbishop of Arles, France |
26 Mar | | Ordained Priest | Burkhard von Randegg † | Priest | Bishop of Konstanz {Constance}, Germany |
27 Mar | 33.2 | Ordained Bishop | Ortlieb Brandis † | Bishop of Chur, Switzerland |
30 Mar | 36.0 | Selected | Ruprecht von Rhein † | Archbishop of Köln {Cologne}, Germany |
31 Mar | | Appointed | Antonio † | Bishop of Castro [del Lazio], Italy | Bishop of Civita Castellana e Orte, Italy |
Apr | 60.2 | Appointed | Bessarion Basilios , O.S.B.M. † | Titular Patriarch of Constantinople | Cardinal, Titular Archbishop of Thebae |
2 Apr | | Confirmed | Gerald Fitzgerald † | Bishop of Cork and Cloyne, Ireland | Bishop Emeritus |
3 Apr | | Appointed | Matteo Antonio † | Bishop of Andria-Montepeloso, Italy |
4 Apr | | Appointed | Luigi Antonii † | Bishop of Terni, Italy |
8 Apr | | Appointed | Martino de Maggio (Madio da Tramonti) † | Bishop of Bisaccia, Italy | Bishop Emeritus of Bisceglie, Italy |
| Appointed | Giacomo Porfida (Cavallina) † | Bishop of Ariano, Italy |
10 Apr | | Appointed | Bartolomeo Gandolfi † | Bishop of Faenza, Italy |
| Ordained Bishop | Bartolomeo Gandolfi † | Bishop of Faenza, Italy |
11 Apr | 51.2 | Died | Gerhard von Hoya † | Archbishop of Bremen (and Hamburg), Germany |
14 Apr | | Appointed | Charles de Neufchâtel † | Archbishop of Besançon, France |
15 Apr | | Appointed | Alessandro (Angelo) Geraldini † | Bishop of Sessa Aurunca, Italy |
17 Apr | | Appointed | Pierre de Ranchicourt † | Bishop of Arras, France |
18 Apr | | Appointed | Marco Lascaris de Tenda † | Bishop of Riez, France | Bishop Emeritus |
| Appointed | Natale de Lombardi † | Bishop of Bovino, Italy |
22 Apr | | Appointed | Robert Berger, O.P. † | Auxiliary Bishop of Rouen, France |
| Appointed | Robert Berger, O.P. † | Auxiliary Bishop of Dol, France | Auxiliary Bishop of Rouen, France |
| Appointed | Robert Berger, O.P. † | Titular Bishop of Sinope | Auxiliary Bishop of Rouen, France |
24.3 | Appointed | Sancho Garcia † | Bishop of Lombez, France |
27 Apr | 78.3 | Died | Isidore of Kiev † | Cardinal, Cardinal-Bishop of Sabina |
4 May | | Appointed | Antonio Jacobucci de’ Misseri † | Bishop of Larino, Italy |
5 May | 75.3 | Appointed | Juan de Torquemada, O.P. † | Cardinal, Cardinal-Bishop of Sabina |
11 May | | Appointed | Patrick Graham † | Bishop of Brechin, Scotland, Great Britain | Archbishop Emeritus of Saint Andrews, Scotland, Great Britain |
15 May | | Ordained Bishop | Nicolas degli Inversi, O.S.M. † | Bishop of Chioggia, Italy |
18 May | 33.3 | Confirmed | Simon zur Lippe † | Bishop of Paderborn, Germany |
23 May | | Appointed | Giovanni Antonio Campani † | Bishop of Teramo, Italy |
| Appointed | Matthias O’Griffith † | Bishop of Killaloe, Ireland |
26 May | | Appointed | Angelo Greco † | Bishop of Martirano (Martoranum), Italy |
| Appointed | Girolamo Staccoli † | Bishop of Urbino, Italy |
| Appointed | Andrea Veroli † | Bishop of Muro Lucano, Italy | Bishop of Camerino, Italy |
30 May | 61.4 | Selected | Dietrich von Schönberg † | Bishop of Meißen (Meissen), Germany |
31 May | 68.4 | Died | Kaspar von Schönberg † | Bishop of Meißen (Meissen), Germany |
Jun | | Died | Richard Messing, O. Carm. † | Bishop of Dromore, Ireland |
6 Jun | | Appointed | Sigismond von Lamberg † | Bishop of Ljubljana (Laybach; Laibach), Slovenia |
8 Jun | | Died | Siggo Ulfsson † | Bishop of Strängnäs (Strengnäs), Sweden |
13 Jun | | Appointed | Stefano Capani † | Bishop of Lavello, Italy |
14 Jun | 53.4 | Appointed | Paweł z Grabowa † | Bishop of Chełm, Poland |
15 Jun | 30.4 | Appointed | William Egremont, O.E.S.A. † | Bishop of Dromore, Ireland |
30.4 | Appointed | William Egremont, O.E.S.A. † | Auxiliary Bishop of York, England, Great Britain | Bishop of Dromore, Ireland |
22 Jun | | Appointed | Matthew McGraith, C.R.S.A. † | Bishop of Clonfert, Ireland |
23 Jun | | Appointed | Giovanni Chinugi † | Bishop of Pienza e Montalcino, Italy |