| Date | Age | Event | Bishop | Title | Current Title | 
|---|
| unknown |  | Died | Rainaldo di Acquaviva † | Bishop of Teramo, Italy | 
|  | Appointed | Guillen de Aranyo, O.P. † | Bishop of Lérida, Spain | 
|  | Died | Oddone Arcioni † | Archbishop of Trani, Italy | 
|  | Appointed | Arduino  † | Bishop of Satriano, Italy | 
|  | Born | Jan d’Arkel † |  | Bishop of Ličge, Belgium | 
|  | Appointed | Guillaume Beaufils † | Bishop of Nevers, France | 
|  | Died | Þór Bokki † | Bishop of Garðar, Greenland | 
|  | Selected | Borzysław  † | Archbishop of Gniezno, Poland | 
|  | Appointed | Thomas Bright † | Bishop of Down, Ireland | 
|  | Ordained Bishop | Thomas Bright † | Bishop of Down, Ireland | 
|  | Died | Leoline Bromfield † | Bishop of Saint Asaph, Wales, Great Britain | 
|  | Died | Angelo da Camerino, O.E.S.A. † | Patriarch of Grado, Italy | 
|  | Appointed | Domenico  † | Bishop of Torcello (Turris), Italy | Patriarch of Grado, Italy | 
|  | Appointed | Giacomo da Fusignano, O.P. † | Bishop of Lucera, Italy | Bishop of Modon (Medone, Methone), Greece | 
|  | Appointed | Giovanni , O.F.M. † | Bishop of Stagno (Ston) et Curzola (Korcula), Croatia | 
|  | Resigned | Grgur , O.E.S.A. † | Bishop of Bosnia (Bosna, Diacovar, Diakovar), Croatia | Bishop Emeritus | 
|  | Appointed | Guglielmo  † | Bishop of Potenza, Italy | 
|  | Died | Ingjald  † | Bishop of Hamar, Norway | 
|  | Appointed | László Kórógyi † | Bishop of Pécs, Hungary | 
|  | Appointed | Pietro Lancetti, O.S.B. † | Bishop of Forlimpopoli, Italy | 
|  | Died | Loterio  † | Bishop of Veroli, Italy | 
|  | Died | Matthew MacDuibne † | Bishop of Kilmore, Ireland | 
|  | Died | Alfonso Martínez † | Bishop of Astorga, Spain | 
|  | Resigned | Nicolň  † | Archbishop of Candia {Crete}, Greece | Titular Patriarch of Constantinople | 
|  | Appointed | Patrick O’Cridigan † | Bishop of Kilmore, Ireland | 
|  | Appointed | Hugues Odard † | Bishop of Angers, France | 
|  | Died | Arne Sigurdsson † | Bishop of Bjřrgvin (Bergen), Norway | 
|  | Appointed | Audfinn Sigurdsson † | Bishop of Bjřrgvin (Bergen), Norway | 
|  | Born | Johann von Zesterfleth † |  | Bishop of Verden, Germany | 
| 11 Jan |  | Appointed | Amanieu de Fargis † | Bishop of Agen, France | 
| 12 Jan |  | Died | Sigibodo de Lichtenberg † | Bishop of Speyer, Germany | 
| 28 Jan |  | Appointed | Raimond  † | Bishop of Périgueux (Vesuna), France | 
| 10 Feb | 64.1 | Died | Riccardo Petroni † | Cardinal-Deacon of Sant’Eustachio | Cardinal, | 
| 11 Feb |  | Died | Gérard Doucet † | Bishop of Tarbes, France | 
| Mar |  | Confirmed | Barthelemy  † | Abbot of Saint-Maurice, Switzerland | Abbot Emeritus | 
| 2 Mar |  | Appointed | Alessandro di Sant’Elpidio, O.E.S.A. † | Archbishop of Candia {Crete}, Greece | Archbishop Emeritus | 
| 14 Mar |  | Appointed | Jean d’Auxois † | Bishop of Troyes, France | 
|  | Appointed | Guichard , O.S.B. † | Bishop of Bosnia (Bosna, Diacovar, Diakovar), Croatia | Bishop Emeritus | 
| 28 Mar |  | Appointed | Paolo Gualducci de Pilastri, O.P. † | Patriarch of Grado, Italy | 
|  | Ordained Bishop | Onofrio  † | Archbishop of Salerno, Italy | 
| 29 Mar |  | Appointed | Fortius d’Auch † | Bishop of Poitiers, France | 
|  | Appointed | Bernard de Villa † | Bishop of Bayonne, France | 
| 30 Mar |  | Appointed | André de Frédol, O.S.A. † | Bishop of Uzés, France | Bishop of Maguelonne, France | 
| 1 Apr |  | Died | Péter  † | Bishop of Pécs, Hungary | 
| 20 Apr | 50.3 | Died | Bertrand de Got † | Pope (Roma {Rome}, Italy) | 
| 13 May |  | Died | Guillaume le Maire † | Bishop of Angers, France | 
| 30 May |  | Died | Nils Kettilsson † | Archbishop of Uppsala, Sweden | 
| Jun |  | Appointed | Emich von Leiningen † | Bishop of Speyer, Germany | 
| 4 Jun |  | Died | Jean de Savigny † | Bishop of Nevers, France | 
| 13 Jul |  | Died | Alberigo Visconti † | Bishop of Fermo, Italy | 
| 27 Aug |  | Died | Gottfried von Hexenagger † | Bishop of Freising, Germany | 
| Sep |  | Died | Robert de Desise † | Bishop of Chalons-sur-Saône, France | 
| 7 Sep |  | Selected | David ap Blethyn † | Bishop of Saint Asaph, Wales, Great Britain | 
| 9 Sep |  | Appointed | Olov Björnsson † | Archbishop of Uppsala, Sweden | 
| 1 Oct |  | Died | Altogrado Cattaneo † | Bishop of Vicenza, Italy | 
| 3 Oct |  | Appointed | Konrad der Sendlinger † | Bishop of Freising, Germany | 
| 4 Oct |  | Appointed | Estęvăo  † | Bishop of Guarda, Portugal | 
| 1 Nov | 54.8 | Died | Gottfried von Bülow † | Bishop of Schwerin, Germany | 
| 3 Nov |  | Born | Nicolás Rossell, O.P. † | Cardinal, |