 | 5ᵗʰ century | 6ᵗʰ century | 7ᵗʰ century |  |
| 5ᵗʰ century | 6ᵗʰ century | 7ᵗʰ century | |
Date | Country | Change |
| 501.10.25 |  Italy | Diocese of Lorium was suppressed (to establish Diocese of Santa Rufina) |
| 501.10.25 | Italy | Diocese of Santa Rufina was established (from the suppressed Diocese of Lorium) |
| 502 | Italy | Diocese of Aquaviva was suppressed (to Diocese of Santa Rufina) |
| 510 |  France | Diocese of Rezé was established (from Diocese of Poitiers and became suffragan of Tours) |
| 510 |  Ireland | Abbacy nullius of Sléibhte was suppressed (to Abbacy nullius of Kildare) |
| 510 | Ireland | Abbacy nullius of Tuam was established |
| 511 | France | Diocese of Laon was established (from Metropolitan Archdiocese of Reims and became suffragan of Reims) |
| 514 |  Northern Ireland | Abbacy nullius of Dromore was established |
| 515 |  Switzerland | Territorial Abbacy of Saint-Maurice d’Agaune was established |
| 520 |  Croatia | Diocese of Cittanova was established (from the suppressed Diocese of Emona and became suffragan of Aquileia) |
| 520 | Ireland | Abbacy nullius of Clonard was established |
| 520 |  Slovenia | Diocese of Emona was suppressed (to establish Diocese of Cittanova) |
| 520 | Slovenia | Diocese of Koper was established (became suffragan of Aquileia) |
| 527 |  Spain | Diocese of Segovia was established (from Diocese of Palencia) |
| 527 | Spain | Diocese of Valencia was established (became suffragan of Tarragona) |
| 529 | Italy | Abbacy nullius of Montecassino was restored (from Diocese of Aquino) |
| 530 |  Belgium | Diocese of Tongeren en Maastricht was suppressed (to establish Diocese of Maastricht) |
| 530 | Croatia | Diocese of Narona was established |
| 530 | Ireland | Abbacy nullius of Seir Kieran was established |
| 530 | Italy | Diocese of Bari was promoted as Metropolitan Archdiocese of Bari |
| 530 |  Netherlands | Diocese of Maastricht was established (from the suppressed Diocese of Tongeren en Maastricht) |
| 530 | Spain | Diocese of Toledo (Mozarabic Rite) was promoted as Metropolitan Archdiocese of Toledo |
| 531 | France | Diocese of Noyon was established (from the suppressed Diocese of Saint-Quentin and became suffragan of Reims) |
| 531 | France | Diocese of Saint-Quentin was suppressed (to establish Diocese of Noyon) |
| 533 |  Bosnia and Herzegovina | Diocese of Sarsenterum was established (from Diocese of Narona) |
| 533 | Croatia | Diocese of Makarska was established (from Diocese of Narona) |
| 533 | France | Diocese of Carcassonne was established (from Metropolitan Archdiocese of Narbonne and became suffragan of Narbonne) |
| 533 | Spain | Diocese of Osca was established |
| 534 | France | Diocese of Mâcon was established (from Diocese of Autun and became suffragan of Lyon) |
| 534 | Italy | Diocese of Bettona was suppressed (to Diocese of Assisi) |
| 540 | Ireland | Abbacy nullius of Clonmacnois was established |
| 542 | Italy | Diocese of Trieste was established (from Diocese of Cittanova and became suffragan of Aquileia) |
| 546 | Italy | Diocese of Strongoli was established |
| 546 |  Wales | Diocese of Bangor was established |
| 550 | Ireland | Abbacy nullius of Achonry was established |
| 550 | Ireland | Abbacy nullius of Aghadoe was established |
| 550 | Ireland | Abbacy nullius of Clonfert was established |
| 550 | Italy | Diocese of Alatri was established (without ecclesiastical province) |
| 550 | Italy | Diocese of Anzio was suppressed (to Diocese of Albano) |
| 550 | Italy | Diocese of Arna was suppressed (to Diocese of Assisi) |
| 550 | Italy | Diocese of Carmeiano was suppressed |
| 550 | Italy | Diocese of Celano was suppressed |
| 550 | Italy | Diocese of Crotone was established |
| 550 | Italy | Diocese of Oderzo was established |
| 550 | Italy | Diocese of Ofena was suppressed (to Diocese of Valva) |
| 550 | Italy | Diocese of Ostra was suppressed (to Diocese of Senigallia) |
| 550 | Italy | Diocese of Potenza Picena was suppressed |
| 550 | Italy | Diocese of Sabiana was established (became suffragan of Aquileia) |
| 550 | Italy | Diocese of Terni was suppressed (to Diocese of Narni) |
| 550 | Northern Ireland, Ireland | Abbacy nullius of Derry was established |
| 550 |  Scotland | Diocese of Glasgow was established |
| 550 | Spain | Diocese of Oreto was established |
| 550 |  Syria | Diocese of Callinicum was suppressed |
| 550 |  Tunisia | Diocese of Carthage was promoted as Metropolitan Archdiocese of Carthage |
| 550 | Tunisia | Diocese of Girba was suppressed |
| 554 | Ireland | Abbacy nullius of Ceanannus Mór was established |
| 557 | Croatia | Diocese of Pedena was established (from Diocese of Trieste) |
| 557 | Italy | Diocese of Trieste lost territory to Diocese of Cittanova |
| 558 | Italy | Metropolitan Archdiocese of Aquileia was promoted as Patriarchal See of Aquileia |
| 558 |  Portugal | Diocese of Dume was established (from Metropolitan Archdiocese of Braga) |
| 560 | Italy | Diocese of Cingoli was suppressed (to Diocese of Osimo) |
| 560 | Italy | Diocese of Plestia was suppressed (to Diocese of Camerino) |
| 560 | Italy | Diocese of Septempeda was suppressed (to Diocese of Camerino) |
| 560 | Italy | Diocese of Tolentino was suppressed (to Diocese of Camerino) |
| 560 | Italy | Diocese of Treia was suppressed (to Diocese of Camerino) |
| 560 | Italy | Diocese of Urbisaglia was suppressed (to Diocese of Camerino) |
| 560 | Wales,  England | Diocese of Llandaff was established |
| 561 | Portugal | Diocese of Viseu was established (from Metropolitan Archdiocese of Braga and became suffragan of Braga) |
| 569 | Italy | Diocese of Altino lost territory to Diocese of Treviso |
| 569 | Italy | Diocese of Oderzo lost territory to Diocese of Treviso |
| 569 | Portugal | Diocese of Caliábria was established (from Diocese of Viseu) |
| 569 | Portugal | Diocese of Egitânia was established (from Diocese of Viseu and became suffragan of Braga) |
| 569 | Portugal | Diocese of Lamego was established (from Diocese of Viseu and became suffragan of Braga) |
| 569 | Portugal | Diocese of Magnetum was established (from Metropolitan Archdiocese of Braga and became suffragan of Braga) |
| 569 | Spain | Diocese of Lugo was promoted as Metropolitan Archdiocese of Lugo (with suffragan sees Iria Flavia, Ourense and Tui) |
| 569 | Spain | Diocese of Tui was established (from Metropolitan Archdiocese of Braga and became suffragan of Lugo) |
| 570 | France | Diocese of Arisitum was established (from Diocese of Nîmes and became suffragan of Narbonne) |
| 570 | France | Diocese of Elne was established (from Metropolitan Archdiocese of Narbonne and became suffragan of Narbonne) |
| 570 | Ireland | Abbacy nullius of Ross was established |
| 570 | Italy | Diocese of Feltre was established (became suffragan of Grado) |
| 570 | Italy | Patriarchal See of Grado was established (from Patriarchal See of Aquileia and with suffragan sees Belluno, Feltre, Malamocco and Padova) |
| 570 | Italy | Diocese of Malamocco was established (from Diocese of Padova and became suffragan of Grado) |
| 570 | Northern Ireland | Abbacy nullius of Ardstraw was established |
| 570 |  Turkiye | Diocese of Aristium was established |
| 572 | Spain | Diocese of Bretoña was established (from Metropolitan Archdiocese of Lugo and became suffragan of Lugo) |
| 573 | France | Diocese of Saint-Jean-de-Maurienne was established (from Diocese of Torino and became suffragan of Vienne) |
| 573 | Wales | Diocese of Saint Asaph was established |
| 575 | Italy | Diocese of Egnazia Appula was suppressed (to Diocese of Brindisi) |
| 575 | Switzerland | Diocese of Octodurum was renamed as Diocese of Sion |
| 578 | Italy | Diocese of Matelica was suppressed (to Diocese of Camerino) |
| 580 | France | Diocese of Arras was suppressed (to establish Diocese of Cambrai) |
| 580 | France | Diocese of Cambrai was established (from the suppressed Diocese of Arras) |
| 580 | France | Diocese of Maguelonne was established (from Diocese of Nîmes and became suffragan of Narbonne) |
| 580 | Ireland | Abbacy nullius of Cloyne was established |
| 580 | Italy | Diocese of Asolo was established |
| 580 | Italy | Abbacy nullius of Montecassino was suppressed |
| 580 | Italy | Diocese of Ortona was established |
| 580 | Italy | Diocese of Tarquinia was suppressed (to establish Diocese of Tuscanella) |
| 580 | Italy | Diocese of Tuscanella was established (from the suppressed Diocese of Tarquinia) |
| 580 | Italy | Diocese of Vicenza was established (from Diocese of Padova and became suffragan of Aquileia) |
| 580 | Spain | Diocese of Salamanca was established (became suffragan of Emerita Augusta) |
| 580 | Spain | Diocese of Segorbe was established |
| 585 | Portugal | Diocese of Magnetum was suppressed (to establish Diocese of Portucale) |
| 585 | Portugal | Diocese of Portucale was established (from the suppressed Diocese of Magnetum and became suffragan of Braga) |
| 589 | Spain | Diocese of Sigüenza was established (became suffragan of Toledo) |
| 590 |  Austria | Diocese of Virunum was suppressed |
| 590 | Bosnia and Herzegovina | Diocese of Duvno was established (from the suppressed Diocese of Makarska) |
| 590 | Croatia | Diocese of Makarska was suppressed (to Metropolitan Archdiocese of Salona and to establish Diocese of Duvno) |
| 590 | France | Diocese of Aleth was established (became suffragan of Tours) |
| 590 | Italy | Diocese of Amalfi was established |
| 590 | Italy | Diocese of Nicotera was established |
| 590 | Italy | Diocese of Orvieto was established (from Diocese of Bolsena and without ecclesiastical province) |
| 590 | Italy | Diocese of Sant’Angelo in Vado was suppressed (to Diocese of Città di Castello and to establish Diocese of Urbino) |
| 590 | Italy | Diocese of Urbino was established (from the suppressed Diocese of Sant’Angelo in Vado) |
| 590 | Italy | Diocese of Uselli was established (became suffragan of Cagliari) |
| 590 |  Montenegro | Diocese of Risano was established |
| 590 | Spain | Diocese of Osma was established (became suffragan of Toledo) |
| 592 | Italy | Diocese of Tre Taverne was suppressed (to Diocese of Velletri) |
| 593.02 | Italy | Diocese of Passo Corese was suppressed (to Diocese of Nomento) |
| 595 |  Germany | Diocese of Konstanz was established (from the suppressed Diocese of Avenches) |
| 595 | Switzerland | Diocese of Avenches was suppressed (to establish Diocese of Konstanz and Diocese of Lausanne) |
| 595 | Switzerland | Diocese of Lausanne was established (from the suppressed Diocese of Avenches and became suffragan of Besançon) |
| 595.09 | Italy | Diocese of Carini was suppressed (to Diocese of Reggio Calabria) |
| 597 | England | Diocese of Canterbury was established |
| 598 | Ireland | Abbacy nullius of Ferns was established |
| 600 |  Albania | Diocese of Onchesmus was suppressed |
| 600 | Albania | Diocese of Phœnice was suppressed |
| 600 | Albania | Diocese of Scampa was suppressed |
| 600 |  Algeria | Diocese of Milevum was suppressed |
| 600 | Austria | Diocese of Aguntum was suppressed |
| 600 | Austria | Metropolitan Archdiocese of Tiburnia was suppressed |
| 600 | Bosnia and Herzegovina | Diocese of Bistue was suppressed |
| 600 | Bosnia and Herzegovina | Diocese of Sarsenterum was suppressed (to Diocese of Ragusa) |
| 600 | Croatia | Diocese of Narona was suppressed (to Diocese of Ragusa) |
| 600 | Croatia | Diocese of Osor was established |
| 600 | Croatia | Diocese of Pula was established (became suffragan of Ravenna) |
| 600 | England | Diocese of York was established |
| 600 | France | Diocese of Briançonnet was suppressed (to Diocese of Glandèves) |
| 600 | France | Diocese of Thérouanne was established (from former Diocese of Arras and became suffragan of Reims) |
| 600 |  Greece | Diocese of Anastasiopolis was established |
| 600 | Greece | Diocese of Eurœa was suppressed |
| 600 | Ireland | Abbacy nullius of Annaghdown was established |
| 600 | Ireland | Abbacy nullius of Cong was established |
| 600 | Ireland | Abbacy nullius of Cork was established |
| 600 | Ireland | Abbacy nullius of Glenndálocha was established |
| 600 | Ireland | Abbacy nullius of Roscrea was established |
| 600 |  Israel | Diocese of Ptolemais was suppressed |
| 600 | Italy | Diocese of Agropoli was suppressed (to Diocese of Pesto) |
| 600 | Italy | Diocese of Alesa was established |
| 600 | Italy | Diocese of Aveia Vestina was suppressed (to establish Diocese of Forconio) |
| 600 | Italy | Diocese of Bagnoregio was established (from Diocese of Bolsena and without ecclesiastical province) |
| 600 | Italy | Diocese of Brixen was established (from the suppressed Diocese of Sabiana and became suffragan of Aquileia) |
| 600 | Italy | Diocese of Caorle was established (from Diocese of Concordia) |
| 600 | Italy | Diocese of Caudium was suppressed (to Diocese of Benevento) |
| 600 | Italy | Diocese of Cesena was established (became suffragan of Ravenna) |
| 600 | Italy | Diocese of Cirella was established |
| 600 | Italy | Diocese of Cosenza was established |
| 600 | Italy | Diocese of Forconio was established (from the suppressed Diocese of Aveia Vestina) |
| 600 | Italy | Diocese of Jesi was established (without ecclesiastical province) |
| 600 | Italy | Diocese of Malvito was established |
| 600 | Italy | Diocese of Milazzo was established |
| 600 | Italy | Diocese of Forum Clodii was renamed as Diocese of Monterano |
| 600 | Italy | Diocese of Roselle lost territory to Diocese of Siena |
| 600 | Italy | Diocese of Ruvo was established |
| 600 | Italy | Diocese of Sabiana was suppressed (to establish Diocese of Brixen) |
| 600 | Italy | Diocese of Tauriano was established |
| 600 |  Libya | Diocese of Cyrene was suppressed |
| 600 | Montenegro | Diocese of Kotor was established (became suffragan of Salona) |
| 600 |  Palestine | Diocese of Gaza was suppressed |
| 600 |  Romania | Archdiocese of Constantia antea Tomi was suppressed |
| 600 |  Serbia | Archdiocese of Iustiniana prima was suppressed |
| 600 | Serbia | Diocese of Naissus was suppressed |
| 600 | Serbia | Diocese of Singidinum was suppressed |
| 600 | Spain | Diocese of Asidonia was established (became suffragan of Sevilla) |
| 600 | Syria | Diocese of Aleppo (Greek-Melkite Rite) was promoted as Archdiocese of Aleppo |
| 600 | Syria | Metropolitan Archdiocese of Berœa was suppressed |
| 600 | Syria | Diocese of Circesium was suppressed |
| 600 | Tunisia | Diocese of Hadrumetum was suppressed |
| 600 | Tunisia | Diocese of Obba was suppressed |
| 600 | Tunisia | Diocese of Tunes was suppressed |
| 600 | Turkiye | Diocese of Batnæ was suppressed |
| 600 | Turkiye | Diocese of Comanæ was suppressed |
| 600 | Turkiye | Archdiocese of Martiropolis was promoted as Metropolitan Archdiocese of Martiropolis |
| 600 | Turkiye | Diocese of Mopsuestia was suppressed |
| 600 | Turkiye | Diocese of Olimpus was suppressed |
| 600 | Turkiye | Diocese of Ægeæ was suppressed |
| 600 | Wales | Diocese of Saint David’s was established |
| 5ᵗʰ century | 6ᵗʰ century | 7ᵗʰ century | |
© 2026 GCatholic.org
|
