| Year | From | To | 
| 1980 | Mission "Sui Iuris" of Kalumburu, Australia
 | Suppressed | Diocese of Broome, Australia
 | Territory Added | 
| 1982 |  |  | Patriarchal Exarchate of Bassorah e Golfo (Syrian), Iraq
 | Erected | 
| 1984 |  |  | Orden de los Hermanos de Belén
 | Restored | 
| 1988 |  |  | Fraternity of Saint Vincent Ferrer
 | Approbation | 
| 1988 |  |  | Servants of Jesus and Mary
 | Founded | 
| 1989 |  |  | Titular See of Bistue
 | Established | 
| 1989 |  |  | Titular See of Bossa
 | Established | 
| 1989 |  |  | Titular See of Buleliana
 | Established | 
| 1989 |  |  | Titular See of Canapium
 | Established | 
| 1989 |  |  | Titular See of Castellum Titulianum
 | Established | 
| 1989 |  |  | Titular See of Catrum
 | Established | 
| 1989 |  |  | Titular See of Cebarades
 | Established | 
| 1989 |  |  | Titular See of Enera
 | Established | 
| 1989 |  |  | Titular See of Macon
 | Established | 
| 1989 |  |  | Titular See of Mattiana
 | Established | 
| 1989 |  |  | Titular See of Paria in Proconsolare
 | Established | 
| 1989 |  |  | Titular See of Pia
 | Established | 
| 1989 |  |  | Titular See of Pocofeltus
 | Established | 
| 1989 |  |  | Titular See of Taddua
 | Established | 
| 1989 |  |  | Titular See of Tagase
 | Established | 
| 1989 |  |  | Titular See of Tamazeni
 | Established | 
| 1989 |  |  | Titular See of Vertara
 | Established | 
| 1989 |  |  | Titular See of Wiener Neustadt
 | Established | 
| 1989 |  |  | Titular See of Bulna
 | Established | 
| 1989 |  |  | Titular See of Buslacena
 | Established | 
| 1989 |  |  | Titular See of Cibaliana
 | Established | 
| 1989 |  |  | Titular See of Murcona
 | Established | 
| 1989 |  |  | Titular See of Musti in Numidia
 | Established | 
| 1989 |  |  | Titular See of Sitipa
 | Established | 
| 1989 |  |  | Titular See of Ausana
 | Established | 
| 1989 |  |  | Titular See of Ausuaga
 | Established | 
| 1989 |  |  | Titular See of Turuda
 | Established | 
| 1989 |  |  | [Patriotic Diocese of Shanba, China]
 | Erected | 
| 1989 |  |  | Franciscan Brothers of the Third Order Regular of Brooklyn
 | Approbation | 
| 1990 |  |  | Franciscan Friars of the Renewal
 | Founded | 
| 1990 |  |  | Institut du Christ Roi Souverain Prétre
 | Founded | 
| 1991 | Patriarchal Vicariate of Turkey (Syrian)
 | Elevated | Patriarchal Exarchate of Turkey (Syrian)
 | Elevated | 
| 1991 | Patriarchal Vicariate of Jerusalem (Chaldean), Palestine
 | Elevated | Patriarchal Exarchate of Jerusalem (Chaldean), Palestine
 | Elevated | 
| 1992 | Patriarchal Vicariate of Egypt and Sudan (Melkite Greek)
 | Elevated | Patriarchal Exarchate of Egypt and Sudan (Melkite Greek)
 | Elevated | 
| 1992 | Patriarchal Vicariate of Jerusalem {Gerusalemme} (Melkite Greek), Palestine
 | Elevated | Patriarchal Exarchate of Jerusalem {Gerusalemme} (Melkite Greek), Palestine
 | Elevated | 
| 1992 |  |  | Chemin Neuf Institute
 | Founded | 
| 1992 | Diocese of Tuy-Vigo, Spain
 | Name Changed | Diocese of Tui-Vigo, Spain
 | Name Changed | 
| 1993 |  |  | Canons Regular of the Congregation of Saint Victor
 | Approbation | 
| 1993 |  |  | [Patriotic Diocese of Langfang, China]
 | Erected | 
| 1994 |  |  | Servants of Jesus and Mary
 | Approbation | 
| 1995 |  |  | Titular See of Alton
 | Established | 
| 1995 |  |  | Titular See of Grass Valley
 | Established | 
| 1995 |  |  | Titular See of Jamestown
 | Established | 
| 1995 |  |  | Titular See of Kearney
 | Established | 
| 1995 |  |  | Titular See of Lead
 | Established | 
| 1995 |  |  | Titular See of Leavenworth
 | Established | 
| 1995 |  |  | Titular See of Natchitoches
 | Established | 
| 1995 |  |  | Titular See of Nesqually
 | Established | 
| 1995 |  |  | Titular See of Quincy
 | Established | 
| 1995 |  |  | Titular See of Sault Sainte Marie in Michigan
 | Established | 
| 1995 |  |  | Titular See of Vincennes
 | Established | 
| 1995 |  |  | Titular See of Concordia
 | Established | 
| 1996 |  |  | Titular See of California
 | Established | 
| 1996 |  |  | Titular See of Gardar
 | Established | 
| 1996 |  |  | Titular See of Oregon City
 | Established | 
| 1996 | Delegation to Sierra Leone
 | Elevated | Nunciature to Sierra Leone
 | Elevated | 
| 1996 | [Patriotic Diocese of Langfang, China]
 | Territory Added | 
| 1997 |  |  | Patriarchal Dependent Territory of Sudan (Syrian)
 | Established | 
| 1997 | Patriarchal Exarchate of Jerusalem (Chaldean), Palestine
 | Elevated | Patriarchal Dependent Territory of Jerusalem (Chaldean), Palestine
 | Elevated | 
| 1998 | Patriarchal Exarchate of Egypt and Sudan (Melkite Greek)
 | Elevated | Patriarchal Dependent Territory of Egypt and Sudan (Melkite Greek)
 | Elevated | 
| 1998 | Patriarchal Exarchate of Jerusalem {Gerusalemme} (Melkite Greek), Palestine
 | Elevated | Patriarchal Dependent Territory of Jerusalem {Gerusalemme} (Melkite Greek), Palestine
 | Elevated | 
| 1999 | Delegation to Singapore
 | Elevated | Nunciature to Singapore
 | Elevated | 
| 1999 | Pontifical Council for the Interpretation of Legislative Texts, Roman Curia
 | Name Changed | Pontifical Council for Legislative Texts, Roman Curia
 | Name Changed | 
| 2002 | Nunciature to Yugoslavia
 | Split | Nunciature to Serbia and Montenegro
 | Split | 
| 2004 | Cardinal Titular Church of San Teodoro
 | Territory Added | 
| 2005 |  |  | Clerical Society of Virgo Flos Carmeli
 | Founded | 
| 2009 | Nunciature to European Community
 | Name Changed | Nunciature to European Union
 | Name Changed | 
| 2009 |  |  | Diocese of Ilorin, Nigeria (from Kaduna)
 | Metropolitan Changed | 
| 2011 |  |  | Delegation to Viêt Nam
 | Established | 
| 2012 | Patriarchal Dependent Territory of Egypt and Sudan (Melkite Greek)
 | Name Changed | Patriarchal Dependent Territory of Egypt, Sudan, and South Sudan (Melkite Greek)
 | Name Changed | 
| 2012 | Patriarchal Dependent Territory of Sudan (Syrian)
 | Name Changed | Patriarchal Dependent Territory of Sudan and South Sudan (Syrian)
 | Name Changed | 
| 2013 | Cardinal Titular Church of San Giovanni Battista Decollato
 | Territory Added | 
| 2016 | Prefecture for the Economic Affairs of the Holy See, Roman Curia
 | Territory Added | 
| 2016 |  |  | Diocese of Kingstown, Saint Vincent and Grenadines, Antilles (from Port of Spain)
 | Metropolitan Changed | 
| 2017 |  |  | Diocese of Gurué, Mozambique (from Beira to Nampula)
 | Metropolitan Changed | 
| 2018 |  |  | Territorial Prelature of Batanes, Philippines (from Nueva Segovia to Tuguegarao)
 | Metropolitan Changed | 
| 2019 | Titular See of Valpuesta
 | Territory Added | 
| 2020 |  |  | Eparchy of Hosur (Syro-Malabar), India (from Immediately Subject)
 | Metropolitan Changed | 
| 1st Century |  |  | Diocese of Roma {Rome}, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Brescia, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Catania, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Cartagena (en España)
 | Erected | 
| 1st Century |  |  | Diocese of Cesena, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Nepi, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Fano, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Firenze, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Fiesole, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Foligno, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Guadix, Spain
 | Erected | 
| 1st Century |  |  | Diocese of Limoges, France
 | Erected | 
| 1st Century |  |  | Diocese of Lucca, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Milano, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Napoli, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Palermo, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Pavia, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Pozzuoli, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Ravenna, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Reggio Calabria, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Reggio Emilia, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Benevento, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Spoleto, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Tarragona, Spain
 | Erected | 
| 1st Century |  |  | Diocese of Toledo, Spain
 | Erected | 
| 1st Century |  |  | Diocese of Trier, Germany
 | Erected | 
| 1st Century |  |  | Diocese of Agrigento (Girgenti), Italy
 | Erected | 
| 1st Century |  |  | Diocese of Aix, France
 | Erected | 
| 1st Century |  |  | Diocese of Terracina, Italy
 | Erected | 
| 1st Century |  |  | Diocese of Marseille, France
 | Erected | 
| 1st Century |  |  | Diocese of Sens, France
 | Erected | 
| 1st Century |  |  | Diocese of Malta
 | Erected | 
| 1st Century |  |  | Diocese of Antiochia {Antioch}, Syria
 | Erected | 
| 1st Century |  |  | Diocese of Alexandria {Alessandria}, Egypt
 | Erected | 
| 1st Century |  |  | Diocese of Byzantium, Turkey
 | Erected | 
| 1st Century |  |  | Archdiocese of Ephesus, Turkey
 | Erected | 
| 1st Century |  |  | Archdiocese of Hierapolis (Phrygia), Turkey
 | Erected | 
| 1st Century |  |  | Archdiocese of Edessa (in Osrhoëne), Turkey
 | Erected | 
| 2nd Century |  |  | Diocese of Avellino, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Bayeux, France
 | Erected | 
| 2nd Century |  |  | Diocese of Belluno, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Besançon, France
 | Erected | 
| 2nd Century |  |  | Diocese of Capua, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Forli, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Köln, Germany
 | Erected | 
| 2nd Century |  |  | Diocese of Lyon, France
 | Erected | 
| 2nd Century |  |  | Diocese of Lugo, Spain
 | Erected | 
| 2nd Century |  |  | Diocese of Nola, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Todi, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Perugia, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Rouen, France
 | Erected | 
| 2nd Century |  |  | Diocese of Siracusa, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Tivoli, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Tortona, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Trento, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Vicenza, Italy
 | Erected | 
| 2nd Century |  |  | Diocese of Priverno (or Piperno), Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Amiens, France
 | Erected | 
| 3rd Century |  |  | Diocese of Ajaccio, France
 | Erected | 
| 3rd Century |  |  | Diocese of Angoulême, France
 | Erected | 
| 3rd Century |  |  | Diocese of Arezzo, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Assisi, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Asti, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Autun, France
 | Erected | 
| 3rd Century |  |  | Diocese of Bologna, Italy
 | Erected | 
| 3rd Century |  |  | Archdiocese of Bordeaux, France
 | Erected | 
| 3rd Century |  |  | Archdiocese of Bourges, France
 | Erected | 
| 3rd Century |  |  | Diocese of Camerino, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Cahors, France
 | Erected | 
| 3rd Century |  |  | Diocese of Clermont, France
 | Erected | 
| 3rd Century |  |  | Diocese of Córdoba, Spain
 | Erected | 
| 3rd Century |  |  | Diocese of Évreux, France
 | Erected | 
| 3rd Century |  |  | Diocese of Faenza, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Fermo, Italy
 | Erected | 
| 3rd Century |  |  | Suburbicarian See of Frascati, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Genova, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Ilurir (Eliberi, Elvira, Granada), Spain
 | Erected | 
| 3rd Century | Diocese of Lyon, France
 | Elevated | Archdiocese of Lyon, France
 | Elevated | 
| 3rd Century |  |  | Diocese of Meaux, France
 | Erected | 
| 3rd Century |  |  | Diocese of Mende, France (or 4th Century)
 | Erected | 
| 3rd Century |  |  | Diocese of Metz, France
 | Erected | 
| 3rd Century |  |  | Diocese of Chiusi, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Maguelonne, France
 | Erected | 
| 3rd Century |  |  | Diocese of Nice, France
 | Erected | 
| 3rd Century |  |  | Diocese of Nocera de’ Pagani, Italy (or 4th Century)
 | Erected | 
| 3rd Century |  |  | Diocese of Orléans, France
 | Erected | 
| 3rd Century |  |  | Suburbicarian See of Ostia, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Padova {Padua}, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Palencia, Spain
 | Erected | 
| 3rd Century |  |  | Diocese of Paris, France
 | Erected | 
| 3rd Century |  |  | Diocese of Pesaro, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Pistoia, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Poitiers, France
 | Erected | 
| 3rd Century |  |  | Diocese of Poreč (Parenzo), Croatia
 | Erected | 
| 3rd Century |  |  | Diocese of Porto, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Rennes, France
 | Erected | 
| 3rd Century |  |  | Diocese of Rimini, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Sevilla, Spain
 | Erected | 
| 3rd Century |  |  | Diocese of Sées {Séez}, France
 | Erected | 
| 3rd Century |  |  | Diocese of Soissons, France
 | Erected | 
| 3rd Century |  |  | Diocese of Sora, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Salona, Croatia
 | Erected | 
| 3rd Century |  |  | Diocese of Toulouse, France
 | Erected | 
| 3rd Century |  |  | Diocese of Tours, France
 | Erected | 
| 3rd Century |  |  | Diocese of Vercelli, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Verona, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Ancona, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Toscanella (Tuscania), Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Modena, Italy
 | Erected | 
| 3rd Century |  |  | Diocese of Siponto, Italy
 | Erected | 
| 3rd Century |  |  | Archeparchy of Damas (Melkite Greek), Syria
 | Erected | 
| 3rd Century |  |  | Cardinal Titular Church of Frascati
 | Erected | 
| 3rd Century |  |  | Cardinal Titular Church of Porto
 | Erected | 
| 3rd Century |  |  | Diocese of Albi, France
 | Erected | 
| 3rd Century |  |  | Diocese of Arles, France
 | Erected | 
| 3rd Century |  |  | Diocese of Auxerre, France
 | Erected | 
| 3rd Century |  |  | Diocese of Beauvais, France
 | Erected | 
| 3rd Century |  |  | Diocese of Chartres, France
 | Erected | 
| 3rd Century |  |  | Diocese of Die, France
 | Erected | 
| 3rd Century |  |  | Diocese of Langres, France
 | Erected | 
| 3rd Century |  |  | Diocese of Le Puy-en-Velay, France
 | Erected | 
| 3rd Century |  |  | Diocese of Narbonne, France
 | Erected | 
| 3rd Century |  |  | Diocese of Périgueux (Vesuna), France
 | Erected | 
| 3rd Century |  |  | Diocese of Reims, France
 | Erected | 
| 3rd Century |  |  | Diocese of Saintes, France
 | Erected | 
| 3rd Century | Diocese of Sens, France
 | Elevated | Archdiocese of Sens, France
 | Elevated | 
| 3rd Century |  |  | Diocese of Vienne, France
 | Erected | 
| 3rd Century |  |  | Diocese of Petelia, Italy
 | Erected | 
| 3rd Century |  |  | Cardinal Titular Church of Ostia
 | Erected | 
| 3rd Century |  |  | Diocese of Tarsus, Turkey
 | Erected | 
| 4th Century |  |  | Diocese of Agen, France
 | Erected | 
| 4th Century |  |  | Diocese of Alba (Pompea), Italy
 | Erected | 
| 4th Century |  |  | Diocese of Acqui, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Ávila, Spain
 | Erected | 
| 4th Century |  |  | Diocese of Ascoli Piceno, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Barcelona, Spain
 | Erected | 
| 4th Century |  |  | Diocese of Bari, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Bayonne, France ((or 6th Century))
 | Erected | 
| 4th Century | Diocese of Besançon, France
 | Elevated | Archdiocese of Besançon, France
 | Elevated | 
| 4th Century |  |  | Diocese of Bergamo, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Braga, Portugal
 | Erected | 
| 4th Century |  |  | Diocese of Brindisi, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Cagliari, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Squillace, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Sarsina, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Concordia (Sagittaria), Italy
 | Erected | 
| 4th Century |  |  | Diocese of Como, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Cremona, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Cagli, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Digne, France
 | Erected | 
| 4th Century |  |  | Diocese of Évora, Portugal
 | Erected | 
| 4th Century |  |  | Diocese of Ferentino, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Gerona, Spain
 | Erected | 
| 4th Century |  |  | Diocese of Piacenza, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Grenoble, France
 | Erected | 
| 4th Century |  |  | Diocese of Imola, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Genève {Geneva}, Switzerland
 | Erected | 
| 4th Century |  |  | Diocese of León, Spain
 | Erected | 
| 4th Century |  |  | Diocese of Lisboa, Portugal
 | Erected | 
| 4th Century |  |  | Diocese of Lodi, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Lucera, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Mainz, Germany
 | Erected | 
| 4th Century | Diocese of Milano, Italy
 | Elevated | Archdiocese of Milano {Milan}, Italy
 | Elevated | 
| 4th Century |  |  | Diocese of Nantes, France
 | Erected | 
| 4th Century |  |  | Diocese of Novara, Italy
 | Erected | 
| 4th Century |  |  | Suburbicarian See of Palestrina, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Parma, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Pisa, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Porto, Portugal
 | Erected | 
| 4th Century | Diocese of Sevilla, Spain
 | Elevated | Archdiocese of Sevilla {Seville}, Spain
 | Elevated | 
| 4th Century |  |  | Suburbicarian See of Albano, Italy
 | Erected | 
| 4th Century |  |  | Archdiocese of Dardania, North Macedonia
 | Erected | 
| 4th Century |  |  | Diocese of Siena, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Sion {Sitten}, Switzerland
 | Erected | 
| 4th Century |  |  | Diocese of Castellammare di Stabia, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Speyer, Germany
 | Erected | 
| 4th Century |  |  | Diocese of Strasbourg, France
 | Erected | 
| 4th Century |  |  | Diocese of Narni, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Civita (Tempio), Italy
 | Erected | 
| 4th Century | Diocese of Toledo, Spain
 | Elevated | Archdiocese of Toledo, Spain
 | Elevated | 
| 4th Century |  |  | Diocese of Torino, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Tortosa, Spain
 | Erected | 
| 4th Century |  |  | Diocese of Treviso, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Troyes, France
 | Erected | 
| 4th Century |  |  | Diocese of Urgell, Spain
 | Erected | 
| 4th Century |  |  | Diocese of Valence, France
 | Erected | 
| 4th Century |  |  | Diocese of Acerenza, Italy
 | Erected | 
| 4th Century |  |  | Eparchy of Alep (Melkite Greek), Syria
 | Erected | 
| 4th Century |  |  | Diocese of Avignon, France
 | Erected | 
| 4th Century |  |  | Diocese of Sirmio (Srijem; Sirmium), Croatia
 | Erected | 
| 4th Century |  |  | Confederation of Canons Regular of St. Augustine
 | Founded | 
| 4th Century |  |  | Cardinal Titular Church of Albano
 | Erected | 
| 4th Century |  |  | Cardinal Titular Church of Palestrina
 | Erected | 
| 4th Century |  |  | Cardinal Titular Church of Santa Cecilia
 | Established | 
| 4th Century |  |  | Diocese of Antibes, France
 | Erected | 
| 4th Century |  |  | Diocese of Apt, France
 | Erected | 
| 4th Century |  |  | Diocese of Chalons-sur-Marne, France
 | Erected | 
| 4th Century |  |  | Diocese of Cimiez, France
 | Erected | 
| 4th Century |  |  | Diocese of (Saint-Lizier de) Couserans (or Conserans), France
 | Erected | 
| 4th Century |  |  | Diocese of Embrun, France
 | Erected | 
| 4th Century |  |  | Diocese of Fréjus, France
 | Erected | 
| 4th Century |  |  | Diocese of Lectoure, France
 | Erected | 
| 4th Century |  |  | Diocese of Nevers, France
 | Erected | 
| 4th Century | Diocese of Reims, France
 | Elevated | Archdiocese of Reims, France
 | Elevated | 
| 4th Century |  |  | Diocese of Saint-Paul-Trois-Châteaux, France
 | Erected | 
| 4th Century |  |  | Diocese of Tarbes, France
 | Erected | 
| 4th Century |  |  | Diocese of Verdun, France
 | Erected | 
| 4th Century |  |  | Diocese of Vernay, France
 | Erected | 
| 4th Century |  |  | Diocese of Viviers (Aps), France
 | Erected | 
| 4th Century |  |  | Diocese of Aosta, Italy
 | Erected | 
| 4th Century |  |  | Diocese of London, England, Great Britain
 | Erected | 
| 4th Century |  |  | Archeparchy of Beirut {Bairut} (Melkite Greek), Lebanon
 | Erected | 
| 4th Century |  |  | Diocese of Amiterno, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Atella, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Eca, Italy
 | Erected | 
| 4th Century |  |  | Diocese of Helvetii / Aventicum [Avenches] / Vindonissa [Windisch], Switzerland
 | Erected | 
| 4th Century |  |  | Diocese of Ancyra (Phrygia), Turkey
 | Erected | 
| 4th Century |  |  | Apostolic Chancery, Roman Curia
 | Established | 
| 4th Century |  |  | Diocese of Canosa (di Puglia), Italy
 | Erected | 
| 5th Century |  |  | Diocese of Connor, Ireland
 | Erected | 
| 5th Century |  |  | Diocese of Killaloe, Ireland
 | Erected | 
| 5th Century |  |  | Diocese of Kilmore, Ireland
 | Erected | 
| 5th Century |  |  | Diocese of Raphoe, Ireland
 | Erected | 
| 5th Century |  |  | Diocese of Alife, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Bosa, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Ardagh (and Clonmacnois), Ireland
 | Erected | 
| 5th Century |  |  | Diocese of Gualdo Tadino, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Nocera Umbra, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Calahorra, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Cassano all’Jonio, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Telese o Cerreto Sannita, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Chur, Switzerland
 | Erected | 
| 5th Century |  |  | Diocese of Sutri, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Conversano, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Coutances, France
 | Erected | 
| 5th Century |  |  | Diocese of Fossombrone, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Bovino, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Gubbio, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Isernia, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Le Mans, France
 | Erected | 
| 5th Century |  |  | Diocese of Gerace, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Lérida, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Cingoli, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Tolentino, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Mallorca, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Massa Marittima, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Venosa, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Menorca, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Messina, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Orense, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Pamplona, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Tarazona, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Penne, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Teramo, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Potenza, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Quimper, France
 | Erected | 
| 5th Century | Diocese of Ravenna, Italy
 | Elevated | Archdiocese of Ravenna, Italy
 | Elevated | 
| 5th Century |  |  | Diocese of Rieti, Italy
 | Erected | 
| 5th Century | Diocese of Rouen, France
 | Elevated | Archdiocese of Rouen, France (or 6th Century)
 | Elevated | 
| 5th Century |  |  | Diocese of Forum Novum, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Saint-Brieuc, France
 | Erected | 
| 5th Century |  |  | Diocese of Torres, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Aquino, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Norcia, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Sorrento, Italy
 | Erected | 
| 5th Century | Diocese of Salona, Croatia
 | Elevated | Archdiocese of Salona, Croatia
 | Elevated | 
| 5th Century |  |  | Diocese of Valva, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Calvi Risorta, Italy
 | Erected | 
| 5th Century | Diocese of Tarragona, Spain
 | Elevated | Archdiocese of Tarragona, Spain
 | Elevated | 
| 5th Century |  |  | Diocese of Amelia, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Larino, Italy
 | Erected | 
| 5th Century | Diocese of Tours, France
 | Elevated | Archdiocese of Tours, France
 | Elevated | 
| 5th Century |  |  | Diocese of Segni, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Velletri, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Vannes, France
 | Erected | 
| 5th Century |  |  | Diocese of Vic, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Volterra, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Zaragoza, Spain
 | Erected | 
| 5th Century |  |  | Diocese of Ivrea, Italy
 | Erected | 
| 5th Century | Diocese of Aix, France
 | Elevated | Archdiocese of Aix, France
 | Elevated | 
| 5th Century |  |  | Diocese of Albenga, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Anagni, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Sessa Aurunca, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Matelica, Italy
 | Erected | 
| 5th Century |  |  | Archeparchy of Perat-Maishan (Chaldean), Iraq
 | Erected | 
| 5th Century |  |  | Cardinal Titular Church of Santi Giovanni e Paolo
 | Established | 
| 5th Century |  |  | Diocese of Acqs (Dax), France
 | Erected | 
| 5th Century |  |  | Diocese of Agde, France
 | Erected | 
| 5th Century |  |  | Diocese of Aire, France
 | Erected | 
| 5th Century |  |  | Diocese of Belley, France
 | Erected | 
| 5th Century |  |  | Diocese of (Saint-Bertrand de) Comminges, France
 | Erected | 
| 5th Century |  |  | Diocese of Gap, France
 | Erected | 
| 5th Century |  |  | Diocese of Laon, France
 | Erected | 
| 5th Century |  |  | Diocese of Mariana, France
 | Erected | 
| 5th Century |  |  | Diocese of Nebbio, France
 | Erected | 
| 5th Century |  |  | Diocese of Nîmes, France
 | Erected | 
| 5th Century |  |  | Diocese of Rodez, France
 | Erected | 
| 5th Century |  |  | Diocese of Tarentaise (Moûtiers-en-Tarentaise), France
 | Erected | 
| 5th Century |  |  | Diocese of Vence, France
 | Erected | 
| 5th Century |  |  | Cardinal Titular Church of San Vitale
 | Established | 
| 5th Century |  |  | Cardinal Titular Church of Sabina
 | Erected | 
| 5th Century |  |  | Diocese of Literno, Italy
 | Erected | 
| 5th Century |  |  | Diocese of Iria Flavia (Iria, Locus Sancti Iacobi), Spain (or 6th Century)
 | Erected | 
| 6th Century |  |  | Diocese of Augsburg, Germany
 | Erected | 
| 6th Century | Diocese of Bari, Italy
 Diocese of Canosa (di Puglia), Italy
 | Elevated | Archdiocese of Bari (-Canosa), Italy
 | Elevated | 
| 6th Century |  |  | Diocese of Arras, France
 | Erected | 
| 6th Century |  |  | Diocese of Kerry (o Ardfert) e Aghadoe, Ireland
 | Erected | 
| 6th Century |  |  | Diocese of Down, Ireland
 | Erected | 
| 6th Century |  |  | Diocese of Ruvo (Ruo)(di Puglia), Italy
 | Erected | 
| 6th Century |  |  | Diocese of Killala, Ireland
 | Erected | 
| 6th Century |  |  | Diocese of Feltre, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Sabiona-Säben, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Cambrai, France
 | Erected | 
| 6th Century |  |  | Diocese of Chieti, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Coimbra, Portugal
 | Erected | 
| 6th Century |  |  | Diocese of Crotone (Cotrone), Italy
 | Erected | 
| 6th Century |  |  | Diocese of Comacchio, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Guarda, Portugal
 | Erected | 
| 6th Century |  |  | Diocese of Jesi, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Nicastro, Italy
 | Erected | 
| 6th Century | Diocese of Helvetii / Aventicum [Avenches] / Vindonissa [Windisch], Switzerland
 | Territory Lost | Diocese of Konstanz {Constance}, Germany
 Diocese of Lausanne, Switzerland
 | Erected | 
| 6th Century |  |  | Diocese of Nicotera, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Gallipoli, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Amalfi, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Orvieto, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Pula (Pola), Croatia
 | Erected | 
| 6th Century |  |  | Diocese of Santa Rufina, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Cervia, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Salerno, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Salzburg, Austria
 | Erected | 
| 6th Century |  |  | Diocese of Segorbe, Spain
 | Erected | 
| 6th Century |  |  | Diocese of Segovia, Spain
 | Erected | 
| 6th Century | Diocese of Ostra, Italy
 | Territory Lost | Diocese of Senigallia, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Makarska, Croatia
 | Erected | 
| 6th Century |  |  | Diocese of Sulmona, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Taranto, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Teano, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Tournai, Belgium
 | Erected | 
| 6th Century |  |  | Diocese of Trani, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Trieste, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Tude (Tuy), Spain
 | Erected | 
| 6th Century |  |  | Diocese of Urbino, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Ceneda, Italy
 | Erected | 
| 6th Century |  |  | Territorial Abbey of Montecassino, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Alatri, Italy
 | Erected | 
| 6th Century |  |  | Diocese of Lescar, France
 | Erected | 
| 6th Century |  |  | Diocese of Oloron (Oloron-Sainte-Marie), France
 | Erected | 
| 6th Century |  |  | Diocese of Bagnoregio (Bagnorea), Italy
 | Erected | 
| 6th Century |  |  | Diocese of Viterbo, Italy
 | Erected | 
| 6th Century | Eparchy of Alep (Melkite Greek), Syria
 | Elevated | Archeparchy of Alep [Beroea, Halab] (Melkite Greek), Syria
 | Elevated | 
| 6th Century |  |  | Order of Saint Benedict
 | Founded | 
| 6th Century |  |  | Diocese of Aleria, France
 | Erected | 
| 6th Century |  |  | Diocese of Auch, France
 | Erected | 
| 6th Century |  |  | Diocese of Elne, France
 | Erected | 
| 6th Century |  |  | Diocese of Saint-Jean-de-Maurienne, France
 | Erected | 
| 6th Century |  |  | Diocese of Saint-Pol-de-Léon, France
 | Erected | 
| 6th Century |  |  | Diocese of Saint David’s, Wales, Great Britain
 | Erected | 
| 6th Century |  |  | Diocese of Asolo (Cittanova; Eraclea), Italy
 | Erected | 
| 6th Century |  |  | Diocese of Aleth, France
 | Erected | 
| 6th Century | Diocese of Tarsus, Turkey
 | Elevated | Archdiocese of Tarsus, Turkey
 | Elevated | 
| 7th Century |  |  | Diocese of Ferns, Ireland
 | Erected | 
| 7th Century |  |  | Diocese of Cork, Ireland
 | Erected | 
| 7th Century |  |  | Diocese of Limerick, Ireland
 | Erected | 
| 7th Century |  |  | Diocese of Chioggia, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Città di Castello, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Orte, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Bisignano, Italy (or 8th Century)
 | Erected | 
| 7th Century |  |  | Diocese of Cosenza, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Santa Severina, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Jaén, Spain
 | Erected | 
| 7th Century |  |  | Diocese of Osimo, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Tropea, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Otranto, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Sovana (Soana), Italy
 | Erected | 
| 7th Century |  |  | Diocese of Bova, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Rossano, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Ventimiglia, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Vrhbosna, Bosnia and Herzegovina
 | Erected | 
| 7th Century |  |  | Diocese of Adria, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Ales (Uselli), Italy
 | Erected | 
| 7th Century |  |  | Diocese of Polignano (Polinianum), Italy
 | Erected | 
| 7th Century |  |  | Diocese of Vico Equense, Italy
 | Erected | 
| 7th Century |  |  | Diocese of Thérouanne, France
 | Erected | 
| 7th Century |  |  | Diocese of Selsey, England, Great Britain
 | Erected | 
| 7th Century |  |  | Diocese of Winchester, England, Great Britain
 | Erected | 
| 7th Century |  |  | Diocese of Bisarcio, Italy
 | Erected | 
| 7th Century | Archdiocese of Edessa (in Osrhoëne), Turkey
 | Territory Added | 
| 8th Century |  |  | Diocese of Gallese, Italy
 | Erected | 
| 8th Century |  |  | Diocese of Veroli, Italy
 | Erected | 
| 8th Century | Diocese of Köln, Germany
 | Elevated | Archdiocese of Köln {Cologne}, Germany
 | Elevated | 
| 8th Century |  |  | Diocese of Conza, Italy
 | Erected | 
| 8th Century |  |  | Diocese of Bisceglie, Italy
 | Erected | 
| 8th Century | Diocese of Trier, Germany
 | Elevated | Archdiocese of Trier, Germany
 | Elevated | 
| 8th Century |  |  | Diocese of Sezze, Italy
 | Erected | 
| 9th Century |  |  | Diocese of Caiazzo, Italy
 | Erected | 
| 9th Century |  |  | Diocese of Bar, Montenegro
 | Erected | 
| 9th Century |  |  | Diocese of Marsi, Italy
 | Erected | 
| 9th Century |  |  | Diocese of Bitonto, Italy
 | Erected | 
| 9th Century |  |  | Diocese of Beograd {Belgrade}, Serbia
 | Erected | 
| 9th Century |  |  | Diocese of Tinos, Greece
 | Erected | 
| 9th Century |  |  | Diocese of Pult (Pulati), Albania
 | Erected | 
| 9th Century |  |  | Diocese of Montefeltro, Italy
 | Erected | 
| 9th Century |  |  | Diocese of Gravina (di Puglia), Italy
 | Erected | 
| 9th Century |  |  | Diocese of Matera, Italy
 | Erected | 
| 9th Century |  |  | Diocese of Minervino Murge, Italy
 | Erected | 
| 9th Century |  |  | Diocese of Equilio (Jesolo), Italy
 | Erected | 
| 9th Century |  |  | Diocese of Novigrad (Cittanova), Croatia
 | Erected | 
| 9th Century |  |  | Diocese of Konavlje, Albania
 | Erected | 
| 9th Century | Diocese of Formia, Italy
 | Name Changed | Diocese of Formia-Gaeta (Caieta), Italy
 | Name Changed | 
| 9th Century |  |  | Diocese of Capodistria (Capo d’Istria)(Koper), Slovenia
 | Erected | 
| 10th Century | Diocese of Sabiona-Säben, Italy
 | Name Changed | Diocese of Brixen {Bressanone}, Italy
 | Name Changed | 
| 10th Century | Diocese of Brindisi, Italy
 | Elevated | Archdiocese of Brindisi, Italy
 | Elevated | 
| 10th Century |  |  | Diocese of Cashel, Ireland
 | Erected | 
| 10th Century |  |  | Diocese of Eger, Hungary
 | Erected | 
| 10th Century | Diocese of Nitra, Slovakia
 Diocese of Passau, Germany
 Diocese of Regensburg, Germany
 | Territory Lost | Archdiocese of Esztergom, Hungary
 | Erected | 
| 10th Century |  |  | Diocese of Kotor (Cattaro), Montenegro
 | Erected | 
| 10th Century | Diocese of Napoli, Italy
 | Elevated | Archdiocese of Napoli {Naples}, Italy
 | Elevated | 
| 10th Century |  |  | Diocese of Płock, Poland
 | Erected | 
| 10th Century | Diocese of Salerno, Italy
 | Elevated | Archdiocese of Salerno, Italy
 | Elevated | 
| 10th Century |  |  | Diocese of Salamanca, Spain
 | Restored | 
| 10th Century |  |  | Diocese of Savona, Italy
 | Erected | 
| 10th Century |  |  | Diocese of Prizren, Serbia
 | Erected | 
| 10th Century | Diocese of Taranto, Italy
 | Elevated | Archdiocese of Taranto, Italy
 | Elevated | 
| 10th Century |  |  | Diocese of Termoli, Italy
 | Erected | 
| 10th Century |  |  | Diocese of Trivento, Italy
 | Erected | 
| 10th Century |  |  | Diocese of Zamora, Spain
 | Erected | 
| 10th Century |  |  | Diocese of Trebinje, Bosnia and Herzegovina
 | Erected | 
| 10th Century |  |  | Diocese of Leuca, Italy
 | Erected | 
| 10th Century |  |  | Diocese of Amantea, Italy
 | Erected | 
| 10th Century | Diocese of Egara, Spain
 | Suppressed | Diocese of Barcelona, Spain
 | Territory Added | 
| 11th Century |  |  | Diocese of Acerra, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Ariano, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Lacedonia, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Ávila, Spain
 | Restored | 
| 11th Century |  |  | Diocese of Ostuni, Italy
 | Erected | 
| 11th Century | Diocese of Cagliari, Italy
 | Elevated | Archdiocese of Cagliari, Italy
 | Elevated | 
| 11th Century |  |  | Diocese of Boiano, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Castellaneta, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Ascoli Satriano (Puglia), Italy
 | Erected | 
| 11th Century |  |  | Diocese of Monopoli, Italy
 | Erected | 
| 11th Century | Diocese of Santa Severina, Italy
 | Elevated | Archdiocese of Santa Severina, Italy
 | Elevated | 
| 11th Century |  |  | Diocese of Bobbio, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Győr (Raab), Hungary
 | Erected | 
| 11th Century |  |  | Diocese of Venafro, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Melfi, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Rapolla, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Giovinazzo, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Terlizzi, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Sarno, Italy
 | Erected | 
| 11th Century | Diocese of Otranto, Italy
 | Elevated | Archdiocese of Otranto, Italy
 | Elevated | 
| 11th Century | Diocese of Palermo, Italy
 | Elevated | Archdiocese of Palermo, Italy
 | Elevated | 
| 11th Century |  |  | Diocese of Muro Lucano, Italy
 | Erected | 
| 11th Century | Diocese of Reggio Calabria, Italy
 | Elevated | Archdiocese of Reggio Calabria, Italy
 | Elevated | 
| 11th Century |  |  | Diocese of Acerno, Italy
 | Erected | 
| 11th Century | Diocese of Conza, Italy
 | Elevated | Archdiocese of Conza, Italy
 | Elevated | 
| 11th Century |  |  | Diocese of Nusco, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Civitate (Città or Civita), Italy
 | Erected | 
| 11th Century |  |  | Diocese of Anglona, Italy
 | Erected | 
| 11th Century | Diocese of Trani, Italy
 | Elevated | Archdiocese of Trani, Italy
 | Elevated | 
| 11th Century |  |  | Diocese of Tricarico, Italy
 | Erected | 
| 11th Century |  |  | Diocese of Vác, Hungary
 | Erected | 
| 11th Century |  |  | Territorial Abbey of Subiaco, Italy
 | Erected | 
| 11th Century | Diocese of Acerenza, Italy
 | Elevated | Archdiocese of Acerenza, Italy
 | Elevated | 
| 11th Century |  |  | Diocese of Andria, Italy
 | Erected | 
| 11th Century | Diocese of Matera, Italy
 | Elevated | Archdiocese of Matera, Italy
 | Elevated | 
| 11th Century |  |  | Diocese of Bosnia (Bosna, Diacovar, Diakovar), Croatia
 | Erected | 
| 11th Century |  |  | Apostolic Chamber, Roman Curia
 | Established | 
| 11th Century |  |  | Diocese of Korčula (Curzola, Cursola), Croatia
 | Erected | 
| 11th Century |  |  | Diocese of Stagno (Ston), Croatia
 | Erected | 
| 11th Century |  |  | Diocese of Sorres (Sorra), Italy
 | Erected | 
| 11th Century |  |  | Canons Regular of the Hospitaller Congregation of Great Saint Bernard
 | Founded | 
| 11th Century |  |  | Canons Regular of the Lateran Congregation of Austria
 | Founded | 
| 11th Century |  |  | Diocese of Suelli, Italy
 | Erected | 
| 11th Century | Diocese of Bomarzo, Italy
 | Suppressed | Diocese of Bagnoregio (Bagnorea), Italy
 | Territory Added | 
| 11th Century | Diocese of Grumento Nova (Grumentum), Italy
 | Name Changed | Diocese of Marsico Nuovo, Italy
 | Name Changed | 
| 12th Century | Diocese of Roda, Spain
 | Name Changed | Diocese of Barbastro, Spain
 | Name Changed | 
| 12th Century |  |  | Diocese of Caserta, Italy
 | Erected | 
| 12th Century |  |  | Diocese of Hvar (Lesina), Croatia
 | Erected | 
| 12th Century |  |  | Diocese of Lamego, Portugal
 | Erected | 
| 12th Century | Diocese of Messina, Italy
 | Elevated | Archdiocese of Messina, Italy
 | Elevated | 
| 12th Century |  |  | Diocese of Molfetta, Italy
 | Erected | 
| 12th Century |  |  | Diocese of Galtelli, Italy
 | Erected | 
| 12th Century |  |  | Diocese of Osma, Spain
 | Erected | 
| 12th Century |  |  | Diocese of Bisaccia, Italy
 | Erected | 
| 12th Century |  |  | Diocese of Sant’Angelo dei Lombardi, Italy
 | Erected | 
| 12th Century |  |  | Diocese of Ampurias, Italy
 | Erected | 
| 12th Century |  |  | Territorial Abbey of Montevergine, Italy
 | Erected | 
| 12th Century |  |  | Diocese of Terralba, Italy
 | Erected | 
| 12th Century | Diocese of Viterbo, Italy
 | United | 
| 12th Century |  |  | Apostolic Penitentiary, Roman Curia
 | Established | 
| 12th Century | Diocese of Skara, Sweden
 | Territory Lost | Diocese of Linköping, Sweden
 | Erected | 
| 12th Century |  |  | Diocese of Västerås (Westeraes), Sweden
 | Erected | 
| 12th Century |  |  | Diocese of Caithness, Scotland, Great Britain
 | Erected | 
| 12th Century |  |  | Diocese of Dunblane, Scotland, Great Britain
 | Erected | 
| 12th Century |  |  | Diocese of Dunkeld, Scotland, Great Britain
 | Erected | 
| 12th Century |  |  | Diocese of Ross (Rosemarkie, Fortrose), Scotland, Great Britain
 | Erected | 
| 12th Century |  |  | Diocese of Scardona (Skradin), Croatia
 | Erected | 
| 12th Century |  |  | Diocese of Trogir (Traù), Croatia
 | Erected | 
| 12th Century | Diocese of Forum Novum, Italy
 | Name Changed | Diocese of Vescovio, Italy
 | Name Changed | 
| 12th Century | Diocese of Ancyra (Phrygia), Turkey
 | Territory Added | 
| 12th Century |  |  | Diocese of Albania
 | Erected | 
| 13th Century |  |  | Diocese of La Calzada, Spain
 | Erected | 
| 13th Century | Diocese of Calahorra, Spain
 Diocese of La Calzada, Spain
 | United | Diocese of Calahorra y La Calzada, Spain
 | United | 
| 13th Century |  |  | Diocese of Chios (Scio), Greece
 | Erected | 
| 13th Century |  |  | Diocese of Cefalonia, Greece
 | Erected | 
| 13th Century |  |  | Diocese of Naxos, Greece
 | Erected | 
| 13th Century |  |  | Diocese of Oppido Mamertina, Italy
 | Erected | 
| 13th Century |  |  | Diocese of Syros (e Milos), Greece
 | Erected | 
| 13th Century |  |  | Diocese of Ugento, Italy
 | Erected | 
| 13th Century |  |  | Diocese of Warmia (Ermland), Poland
 | Erected | 
| 13th Century |  |  | Territorial Abbey of San Martino al Monte Cimino, Italy
 | Erected | 
| 13th Century |  |  | Archdiocese of Durrës (Durazzo), Albania
 | Erected | 
| 13th Century |  |  | Order of Friars Preachers
 | Founded | 
| 13th Century |  |  | Diocese of Andros, Greece
 | Erected | 
| 13th Century |  |  | Diocese of Budua (Budva), Montenegro
 | Erected | 
| 13th Century | Diocese of Sulmona, Italy
 Diocese of Valva, Italy
 | United | Diocese of Valva e Sulmona, Italy
 | United | 
| 13th Century | Diocese of Leuca, Italy
 | Name Changed | Diocese of Alessano, Italy
 | Name Changed | 
| 13th Century | Archdiocese of Tarsus, Turkey
 | Territory Added | 
| 13th Century |  |  | Diocese of Galtelli, Italy (from Pisa)
 | Metropolitan Changed | 
| 14th Century |  |  | Diocese of Lezhë {Lesh, Alessio}, Albania
 | Erected | 
| 14th Century |  |  | Diocese of Cariati, Italy
 | Erected | 
| 14th Century |  |  | Diocese of Vilnius, Lithuania
 | Erected | 
| 14th Century |  |  | Orden de San Jerónimo
 | Founded | 
| 14th Century |  |  | Canons Regular of the Congregation of the Brothers of Community Life
 | Founded | 
| 14th Century |  |  | Diocese of Kisamos (Cisamo), Greece
 | Erected | 
| 14th Century | Archdiocese of Hierapolis (Phrygia), Turkey
 | Territory Added | 
| 14th Century |  |  | Diocese of Dagne (Danj), Albania
 | Erected | 
| 14th Century |  |  | Apostolic Datary, Roman Curia
 | Established | 
| 14th Century |  |  | Fratelli Celliti o Alessiani de Aquisgrana
 | Founded | 
| 15th Century |  |  | Diocese of Montepeloso, Italy
 | Erected | 
| 15th Century |  |  | Apostolic Signatura, Roman Curia
 | Established | 
| 16th Century | Congregation for Cardinals Interpreters of the Council of Trent, Roman Curia
 | Name Changed | Congregation of the Council, Roman Curia
 | Name Changed | 
| 16th Century | Diocese of Dagne (Danj), Albania
 | Territory Added | 
| 17th Century |  |  | Archeparchy of Alep [Beroea, Halab] (Maronite), Syria
 | Erected | 
| 17th Century |  |  | Eparchy of Tripoli del Libano {Tarabulus} (Maronite)
 | Erected | 
| 17th Century | Diocese of Kisamos (Cisamo), Greece
 | Territory Added | 
| 17th Century |  |  | Vicariate Apostolic of Asia Minor, Turkey
 | Erected | 
| 18th Century | Diocese of Prizren, Serbia
 | Suppressed | Archdiocese of Skopje, North Macedonia
 | Territory Added | 
| 18th Century |  |  | Titular See of Icosium
 | Established | 
| 19th Century | Cardinal Titular Church of Sant’Alessio
 | Name Changed | Cardinal Titular Church of Santi Bonifacio ed Alessio
 | Name Changed | 
| 19th Century |  |  | Titular See of Tharona
 | Established |