| Date | Age | Event | Bishop | Title | Current Title | 
|---|
| unknown | 24.8 | Ordained Priest | José Buenaventura Arias Bergara † | Priest | Vicar Apostolic of Mérida, Venezuela | 
| 60.7 | Selected | [Matthieu Asselin] † | Bishop of [Pas-de-Calais (Constitutional), France] | Bishop Emeritus | 
| 79.6 | Died | Bonaventura Calcagnini † | Bishop of Penne e Atri, Italy | 
|  | Born | Efisio Casula † |  | Former Bishop-Elect of Alghero, Italy | 
| 29.6 | Ordained Priest | Pierre-Michel-Marie Double † | Priest | Bishop of Tarbes, France | 
| 49.8 | Ceased | Giovanni Filippo Gallarati Scotti † | Apostolic Nuncio to Venice, Italy | Cardinal, Cardinal-Priest of San Lorenzo in Lucina | 
|  | Born | Georges Hurmuz, C.M.V. † |  | Abbot General of Congregazione Mechitarista di Venezia | 
| 26.0 | Ordained Priest | James Magauran † | Priest | Bishop of Ardagh (and Clonmacnois), Ireland | 
| 36.0 | Ordained Priest | Ramón Ignacio Méndez † | Priest | Archbishop of Caracas, Santiago de Venezuela | 
| 22.2 | Ordained Priest | Giuseppe Gasparo Mezzofanti † | Priest | Cardinal, Cardinal-Priest of Sant’Onofrio | 
| 27.4 | Ordained Priest | Johann Theodor van der Noot † | Priest of Trier, Germany | Vicar Apostolic Emeritus of Luxembourg | 
|  | Born | Paolo Sardi, O.F.M. Conv. † |  | Apostolic Visitor (Visitator) of Moldavia | 
| 25.2 | Ordained Priest | Filip Felicjan Szumborski, O.S.B.M. † | Priest of Basilian Order of Saint Josaphat (Order of St. Basil the Great) | Bishop of Chełm and Bełz (Ukrainian), Poland | 
|  | Born | Józef Twarowski † |  | Auxiliary Bishop of Janów Podlaski (Podlaska o Janów), Poland | 
| 57.2 | Died | Angelo Maria (Giuseppe Caesar Augustus) Vassalli, O.S.B. † | Bishop of Massa Lubrense, Italy | 
| 73.4 | Died | Francesco Saverio de Vivo † | Bishop of Nusco, Italy | 
| 10 Jan | 50.7 | Appointed | Thomas Hussey † | Bishop of Waterford and Lismore, Ireland | 
| 14 Jan | 69.9 | Died | [Pierre-Anastase Torné] † | Bishop Emeritus of [Cher (Constitutional), France] | 
| 18 Jan |  | Born | Juan Alfonso Albuquerque Berión † |  | Bishop of Córdoba, Spain | 
| 21 Jan |  | Born | Auguste Allou (Alloux) † |  | Bishop of Meaux, France | 
| 1 Feb | 75.5 | Died | Ferdynand Onufry Kicki † | Archbishop of Lviv, Ukraine | 
| 2 Feb | 51.0 | Died | Mikeli Kryezezi (Criesesi) † | Bishop of Lezhë {Lesh, Alessio}, Albania | 
| 8 Feb | 80.4 | Died | Alonso de Solís Marroquín y Gragera, O.S. † | Bishop of Badajoz, Spain | 
| 9 Feb | 50.1 | Appointed | Charles O’Donnell † | Coadjutor Bishop of Derry, Ireland | Bishop | 
| 50.1 | Appointed | Charles O’Donnell † | Titular Bishop of Capsus | Bishop of Derry, Ireland | 
| 11 Feb |  | Born | Antonio Herrán y Zaldúa † |  | Archbishop of Santafé en Nueva Granada, Colombia | 
| 40.9 | Appointed | Lorenzo Litta † | Apostolic Nuncio to Russian Federation | Cardinal, Prefect of the Congregation for Residence of Bishops | 
| 12 Feb |  | Born | John Timon, C.M. † |  | Bishop of Buffalo, New York, USA | 
| 13 Feb | 64.9 | Died | Giuseppe Rossi † | Titular Archbishop of Nicosia | 
| 14 Feb | 65.9 | Appointed | Marcello Cortenovis, B. † | Vicar Apostolic of Ava e Pegù, Myanmar | 
| 65.9 | Appointed | Marcello Cortenovis, B. † | Titular Bishop of Sebastopolis in Armenia | Vicar Apostolic of Ava e Pegù, Myanmar | 
| 51.1 | Appointed | Luigi Grondona, B. † | Coadjutor Vicar Apostolic of Ava e Pegù, Myanmar | 
| 51.1 | Appointed | Luigi Grondona, B. † | Titular Bishop of Calydon | Coadjutor Vicar Apostolic of Ava e Pegù, Myanmar | 
| 15 Feb |  | Born | Etienne Jean François Le Herpeur † |  | Bishop of Martinique (Fort-de-France e Saint Pierre), Antilles | 
| 18 Feb |  | Born | Pietro Antonio Garibaldi † |  | Apostolic Nuncio to France | 
| 19 Feb | 76.1 | Died | Jerónimo Rogado do Carvalhal e Silva † | Bishop of Guarda, Portugal | 
| 22 Feb | 80.1 | Died | Joseph-Dominique de Cheylus † | Bishop of Bayeux, France | 
| 25 Feb | 79.4 | Selected | [Augustin-Jean-Charles Clément] † | Bishop of [Seine-et-Oise (Constitutional), France] | Bishop Emeritus | 
| 26 Feb | 50.9 | Ordained Bishop | Thomas Hussey † | Bishop of Waterford and Lismore, Ireland | 
| 75.9 | Died | Damian August Philipp Karl von Limburg-Styrum † | Bishop of Speyer, Germany | 
| 1 Mar | 73.7 | Died | Franz de Paula Xaver Ludwig Jakob von Breuner † | Bishop of Chiemsee, Germany | 
| 3 Mar | 61.8 | Appointed | Vincenzo Labini, O.S.Io.Hieros. † | Titular Archbishop of Rhodus | Bishop of Malta | 
| 10 Mar | 65.3 | Appointed | Carlo Luigi Buronzo del Signore † | Apostolic Administrator of Torino {Turin}, Italy | Archbishop Emeritus | 
| 12 Mar | 79.5 | Ordained Bishop | [Augustin-Jean-Charles Clément] † | Bishop of [Seine-et-Oise (Constitutional), France] | Bishop Emeritus | 
| 16 Mar | 45.3 | Appointed | Giuseppe Maria Doria Pamphilj † | Secretary of the Secretariat of State | Cardinal, Cardinal-Bishop of Porto e Santa Rufina | 
| 45.3 | Appointed | Giuseppe Maria Doria Pamphilj † | Prefect of the Congregation of the Sacred Consulta | Cardinal, Cardinal-Bishop of Porto e Santa Rufina | 
| 18 Mar | 65.5 | Resigned | Ignazio Busca † | Secretary of State | Cardinal, Cardinal-Priest of Santa Maria degli Angeli | 
| 19 Mar |  | Born | Jean-Baptiste Boucho, M.E.P. † |  | Vicar Apostolic of Malacca-Singapore | 
| 69.4 | Ordained Bishop | Francisco Matienzo † | Bishop of Ayacucho o Huamanga (Guamanga), Peru | 
| 23 Mar | 71.0 | Died | Francisco Cuadrillero Mota † | Bishop of Mondoñedo, Spain | 
|  | Born | Manoel de Monte Rodrigues de Araújo † |  | Bishop of São Sebastião do Rio de Janeiro, Brazil | 
| 28 Mar |  | Born | Annibale-Raffaele Montalcini, C.Ss.R. † |  | Archbishop of Santa Severina, Italy | 
| 30 Mar | 42.6 | Selected | Bernardo Bernardino Beltrão Freire † | Bishop of Pinhel, Portugal | 
| 50.8 | Selected | José António Pinto de Mendonça Arrais † | Bishop of Guarda, Portugal | 
| 1 Apr | 27.3 | Ordained Priest | Thomas Gillow † | Priest of Northern District, England, Great Britain | 
| 24.0 | Ordained Priest | Kyran Marum † | Priest of Ossory, Ireland | Bishop | 
| 25.0 | Ordained Priest | Thomas Penswick † | Priest of Northern District, England, Great Britain | Vicar Apostolic | 
| 24.0 | Ordained Priest | Giovanni Battista Tomasuolo † | Priest | Bishop Emeritus of Nicotera e Tropea, Italy | 
| 42.5 | Appointed | Sigmund Christoph von Waldburg-Zeil-Trauchburg † | Bishop of Chiemsee, Germany | Bishop Emeritus | 
| 3 Apr | 68.8 | Died | Juan Francisco Armada Araujo † | Bishop of Huesca, Spain | 
| 7 Apr | 42.6 | Ordained Bishop | Sigmund Christoph von Waldburg-Zeil-Trauchburg † | Bishop of Chiemsee, Germany | Bishop Emeritus | 
| 8 Apr | 75.7 | Died | Salvatore Ventimiglia, C.O. † | Bishop Emeritus of Catania, Italy | 
| 15 Apr | 23.0 | Ordained Priest | Johann Wilhelm Bausch † | Priest of Trier, Germany | Bishop of Limburg, Germany | 
| 23.6 | Ordained Priest | Johann Georg Maria Lorenz Bossi † | Priest of Chur, Switzerland | Bishop of Chur-Sankt Gallen, Switzerland | 
| 22.0 | Ordained Deacon | Vitaliano Provenzano † | Deacon of Catanzaro, Italy | Auxiliary Bishop | 
| 22 Apr | 58.1 | Selected | Philipp Franz Wilderich Nepomuk von Walderdorf † | Bishop of Speyer, Germany |