Catholic DiocesesinHellenic Republic (Greece) | ![]() |
| Former Jurisdiction | Type | Became |
| Anastasiopolis / Anastasiopoli Anastasiopolitan(us) | Diocese | Now Titular Episcopal See of Anastasiopolis and Titular Episcopal See of Anastasiopolis |
| Andros / Andro | Diocese | Suppressed into Diocese of Tinos–Mykonos |
| Arcadia / Arcadia Arcadien(sis) | Diocese | Now Titular Episcopal See of Arcadia and Titular Episcopal See of Arcadia |
| Argos / Argo Argen(sis) | Diocese | Now Titular Episcopal See of Argos and Titular Episcopal See of Argos |
| Ario Arien(sis) | Diocese | Suppressed into Titular Episcopal See of Rhithymna |
| Athens / Athenae / Αθήνα Athenarum / Athenien(sis) | Metr. Archdiocese | Now Archdiocese of Athens |
| Aulon / Aulon Aulonen(sis) | Diocese | Now Titular Episcopal See of Aulon and Titular Episcopal See of Aulon |
| Carystus / Caristo Carysten(sis) | Diocese | Now Titular Episcopal See of Carystus and Titular Episcopal See of Carystus |
| Ceo | Diocese | Now Titular Episcopal See of Cea and Titular Episcopal See of Cea |
| Chersonissos / Chiron Chironen(sis) | Diocese | Now Titular Episcopal See of Chersonesus in Creta and Titular Episcopal See of Chersonesus in Creta |
| Cidonia Agien(sis) | Diocese | Suppressed into and Titular Episcopal See of Cydonia |
| Cnossus / Cnosso Cnossian(us) | Diocese | Now Titular Episcopal See of Cnossus and Titular Episcopal See of Cnossus |
| Constantinople (Bulgarian Rite) | Apostolic Vicariate | Suppressed into |
| Corfù Corcyren(sis) | Diocese | Now Metropolitan Archdiocese of Corfu–Zakynthos–Kefalonia |
| Corinthus / Corinto Corinthien(sis) | Metr. Archdiocese | Now Titular Metropolitan See of Corinthus and Titular Metropolitan See of Corinthus |
| Corone / Corone Coronen(sis) | Diocese | Now Titular Episcopal See of Corone and Titular Episcopal See of Corone |
| Coronea / Coronea Coronen(sis) | Diocese | Now Titular Episcopal See of Coronea and Titular Episcopal See of Coronea |
| Crete / Candia / Creta / Κρήτη / La Canea Candien(sis) | Metr. Archdiocese | Now Apostolic Vicariate of Istanbul |
| Daulis / Daulia | Diocese | Now Titular Episcopal See of Daulia and Titular Episcopal See of Daulia |
| Epidaurum / Epidaurum Epidauritanen(sis) | Diocese | Now Titular Episcopal See of Epidaurum and Titular Episcopal See of Epidaurum |
| Eurœa / Eurea | Diocese | Now Titular Episcopal See of Eurœa in Epiro and Titular Episcopal See of Eurœa in Epiro |
| Gortina Gortynien(sis) | Metr. Archdiocese | Now Titular Metropolitan See of Gortyna and Titular Metropolitan See of Gortyna |
| Hierapetra Hierapetren(sis) | Diocese | Now Titular Episcopal See of Hierapytna and Titular Episcopal See of Hierapytna |
| Hierapetra–Sitia Hierapetren(sis) et Sythien(sis) | Diocese | Now Titular Episcopal See of Hierapytna and Titular Episcopal See of Hierapytna |
| Karpathus / Carpato | Diocese | Now Titular Archiepiscopal See of Carpathus and Titular Archiepiscopal See of Carpathus |
| Kea–Kythnos | Apostolic Vicariate | Suppressed into Diocese of Milos |
| Kea–Kythnos–Sifnos | Diocese | Suppressed into Diocese of Milos |
| Kefalonia Cephalonien(sis) | Diocese | Suppressed into Metropolitan Archdiocese of Corfu–Zakynthos–Kefalonia and Titular Episcopal See of Kefalonia |
| Kefalonia–Zakynthos Cephalonien(sis)–Zacynthien(sis) | Diocese | Suppressed into Metropolitan Archdiocese of Corfu–Zakynthos–Kefalonia and Titular Episcopal See of Kefalonia |
| Kisamos / Cisamus | Diocese | Now Titular Episcopal See of Cisamus and Titular Episcopal See of Cisamus |
| Lango Langonen(sis) | Diocese | Now Titular Episcopal See of Cos and Titular Episcopal See of Cos |
| Larissa / Larissa / Larisa | Metr. Archdiocese | Now Titular Metropolitan See of Larissa in Thessalia and Titular Metropolitan See of Larissa in Thessalia |
| Macedonia (Bulgarian Rite) Macedoniæn(sis) Bulgarorum | Apostolic Vicariate | Suppressed into |
| Malvasia Malvasien(sis) / Monovasien(sis) | Diocese | Suppressed |
| Megara / Megara Megaren(sis) | Diocese | Now Titular Episcopal See of Megara and Titular Episcopal See of Megara |
| Milopotamus / Milopotamo / Milopotamos Mellipotamen(sis) / Milopotamen(sis) | Diocese | Now Titular Episcopal See of Eleutherna and Titular Episcopal See of Eleutherna |
| Milos / Μήλος Milen(sis) | Diocese | United with |
| Modone | Diocese | Now Titular Episcopal See of Methone and Titular Episcopal See of Methone |
| Mytilene / Mitilene | Metr. Archdiocese | Now Titular Metropolitan See of Mitylene and Titular Metropolitan See of Mitylene |
| Naxos Naxien(sis) | Metr. Archdiocese | Now Metropolitan Archdiocese of Naxos–Andros–Tinos–Mykonos |
| Naxos Naxien(sis) | Diocese | Now Metropolitan Archdiocese of Naxos–Andros–Tinos–Mykonos |
| Negroponte Nigriponten(sis) / Nigroponten(sis) | Diocese | Suppressed and Titular Episcopal See of Negroponte |
| Nisyros Niochen(sis) / Niserien(sis) | Diocese | Now Titular Episcopal See of Nisyrus and Titular Episcopal See of Nisyrus |
| Oleno Olenen(sis) | Diocese | Now Titular Episcopal See of Olena and Titular Episcopal See of Olena |
| Patrae Veteres Patracen(sis) | Archdiocese | Suppressed |
| Patrasso / Patræ veteres | Metr. Archdiocese | Now Titular Metropolitan See of Patræ and Titular Metropolitan See of Patræ |
| Patrasso / Patræ veteres | Diocese | Now Titular Metropolitan See of Patræ and Titular Metropolitan See of Patræ |
| Philippi / Filippi Philippen(sis) | Metr. Archdiocese | Now Titular Metropolitan See of Philippi and Titular Metropolitan See of Philippi |
| Philippi / Filippi Philippen(sis) | Diocese | Now Titular Metropolitan See of Philippi and Titular Metropolitan See of Philippi |
| Retimo Calamonen(sis) / Rethymen(sis) | Diocese | Suppressed and Titular Episcopal See of Rhithymna |
| Retimo–Ario Rhithymnen(sis)–Arien(sis) | Diocese | Suppressed and Titular Episcopal See of Rhithymna |
| Rhodes / Rodi / Rhodos Rhodien(sis) | Metr. Archdiocese | Now Archdiocese of Rhodes |
| Rhodes / Rodi / Rhodos Rhodien(sis) | Diocese | Now Archdiocese of Rhodes |
| Rhodes and adjacent islands / Rodi ed Isole adiacenti Rhodien(sis) et ins. | Apostolic Prefecture | Suppressed into |
| Salonica / Σαλονίκη | Apostolic Vicariate | Now Apostolic Vicariate of Thessaloniki |
| Scyrus / Sciro Scyrius | Diocese | Now Titular Episcopal See of Scyrus and Titular Episcopal See of Scyrus |
| Sifnos–Serifos Siphnen(sis) | Apostolic Vicariate | Suppressed into Diocese of Milos |
| Sitia Sythien(sis) | Diocese | Suppressed into Titular Episcopal See of Hierapytna |
| Thebæ / Tebe | Metr. Archdiocese | Now Titular Metropolitan See of Thebæ and Titular Metropolitan See of Thebæ |
| Thermia Firminien(sis) / Thermien(sis) | Diocese | Now Titular Episcopal See of Cea and Titular Episcopal See of Cea |
| Thermopylæ / Termopile Thermopylarum | Diocese | Now Titular Episcopal See of Mundinitza and Titular Episcopal See of Mundinitza |
| Thespia / Tespia | Diocese | Now Titular Episcopal See of Thespiæ and Titular Episcopal See of Thespiæ |
| Thessalonica / Tessalonica Thessalonicen(sis) | Metr. Archdiocese | Now Titular Metropolitan See of Thessalonica and Titular Metropolitan See of Thessalonica |
| Tinos / Tino / Τήνος Tinen(sis) | Diocese | Suppressed into Metropolitan Archdiocese of Naxos–Andros–Tinos–Mykonos |
| Tinos–Mykonos / Tino e Micono / Τήνος–Μύκονος Tinen(sis) et Myconen(sis) | Diocese | Suppressed into Metropolitan Archdiocese of Naxos–Andros–Tinos–Mykonos |
| Zakynthos Zacynthien(sis) | Diocese | Suppressed into Titular Episcopal See of Kefalonia |
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