Date | Age | Event | Bishop | Title | Current Title |
unknown | | Born | Bálint Alsáni † | | Cardinal, Bishop of Pécs, Hungary |
| Died | Nicolas de Barro (Bar) † | Bishop of Mâcon, France |
| Born | Dietrich Bayer von Boppard † | | Bishop of Metz, France |
49.8 | Appointed | Pierre Bertrand (Sr.) † | Archbishop of Bourges, France | Cardinal, Cardinal-Priest of San Clemente |
| Died | Henri de Carreto, O.F.M. † | Bishop of Lucca, Italy |
| Born | Dietrich Damerow † | | Bishop Emeritus of Dorpat (Tartu), Estonia |
| Died | Roberto Drago, O.P. † | Bishop Emeritus of Ales (Uselli), Italy |
| Died | Arnold Eltz, O.P. † | Bishop of Kammin (Camin), Germany |
| Died | Michel MacLochlainn † | Bishop of Derry, Ireland |
| Died | Nicolas † | Archbishop of Cosenza, Italy |
| Died | Guillaume de Villeneuve, O.F.M. † | Bishop of Trieste, Italy |
40.0 | Appointed | Konrad von Liechtenstein † | Bishop of Chiemsee, Germany |
| Born | Francisco Jiménez (Ximenes), O.F.M. † | | Titular Patriarch of Jerusalem {Gerusalemme}, Palestine |
Jan | | Died | Raymond Bot † | Bishop of Apt, France |
5 Jan | | Appointed | John de Ballyconingham † | Bishop of Cork, Ireland |
30 Jan | | Appointed | Pierre de Moussy † | Bishop of Carcassonne, France |
Feb | | Ordained Bishop | Raymond d’Olargues † | Bishop of Vabres, France |
12 Feb | | Appointed | Bartolomeo , O. Carm. † | Bishop of Sulcis, Italy |
50.1 | Appointed | Angelo di Portasole (Portasola, Porta Sole, Porta Sola), O.P. † | Bishop of Grosseto, Italy |
11 Mar | | Ordained Bishop | Raymond de Montaigu † | Bishop of (Saint-Lizier de) Couserans (or Conserans), France | Bishop of Clermont, France |
14 Mar | | Died | Roger Mortival † | Bishop of Salisbury, England, Great Britain |
24 Mar | | Died | Jean Hind † | Bishop of Roskilde (Roeskilde), Denmark |
16 Apr | | Appointed | Robert Wyvill † | Bishop of Salisbury, England, Great Britain |
24 Apr | | Died | Audfinn Sigurdsson † | Bishop of Bjørgvin (Bergen), Norway |
30 Apr | | Ordained Bishop | Bartolomeo , O. Carm. † | Bishop of Sulcis, Italy |
1 Jun | | Appointed | Guiraud de Languisel † | Bishop of Apt, France | Bishop of Nîmes, France |
15 Jun | | Appointed | Jens Nyborg, O.P. † | Bishop of Roskilde (Roeskilde), Denmark |
18 Jun | | Appointed | Thomas de Bourlemont † | Bishop of Toul, France |
27 Jun | | Appointed | Arnaud Royardi, O.F.M. † | Archbishop (Personal Title) of Sarlat, France | Bishop |
15 Jul | | Ordained Bishop | Robert Wyvill † | Bishop of Salisbury, England, Great Britain |
22 Jul | | Ordained Bishop | Thomas de Bourlemont † | Bishop of Toul, France |
31 Aug | | Appointed | Jacques Corvo, O.P. † | Bishop of Toulon, France |
| Appointed | Yves Le Prévôt de Bois Boëssel † | Bishop of Quimper, France | Bishop of Saint-Malo, France |
17 Sep | | Appointed | Friedrich von Eickstedt † | Bishop of Kammin (Camin), Germany | Bishop Emeritus |
| Appointed | Chandadimus de Telegd † | Archbishop of Esztergom, Hungary |
28 Sep | | Appointed | Ferrier de Abella, O.P. † | Archbishop (Personal Title) of Mazara del Vallo, Italy | Bishop of Barcelona, Spain |
29 Sep | | Died | Ingerand de Créqui † | Bishop of Thérouanne, France |
30 Sep | | Ordained Bishop | Friedrich von Eickstedt † | Bishop of Kammin (Camin), Germany | Bishop Emeritus |
1 Oct | | Appointed | Arnaud Sabatier † | Bishop of Riez, France |
20 Oct | | Died | Berenguel Landore, O.P. † | Archbishop of Santiago de Compostela, Spain |
5 Nov | | Appointed | Giovanni Pagnotta, O.S.A. † | Bishop of Anagni, Italy |
10 Nov | | Died | Ulrich von Montpreis † | Bishop of Chiemsee, Germany |
24 Nov | | Died | Guillaume de Durfort † | Archbishop of Rouen, France |
14 Dec | 40.9 | Appointed | Pierre Roger, O.S.B. † | Archbishop of Rouen, France | Pope (Roma {Rome}, Italy) |
| Appointed | Jean de Vienne † | Bishop of Thérouanne, France | Archbishop of Reims, France |