Usor:Lesgles/Sedes titulares
- Abaradira
- Abari
- Abbir Germaniciana (Africa proconsularis)
- Abbir Maius (Africa proconsularis)
- Abercornia
- Abernethia
- Abidda
- Abila in Palaestina
- Abila Lysaniae
- Abitinae
- Abora (Africa proconsularis)
- Abrittum
- Absa Salla (Africa proconsularis)
- Absorus
- Abthugni (Africa proconsularis)
- Abula
- Abydus
- Abziri (Africa proconsularis)
- Acalissus
- Acarassus
- Acci
- Accia
- Acelum
- Achelous
- Acholla
- Achrida (Ohrid)
- Achyraus
- Acilisene
- Acmonia
- Acrassus
- Acropolis
- Acufida
- Adada
- Adana (Ecclesia Armena Catholica)
- Adana (Ecclesia Graeco-Melchita Catholica)
- Adraa
- Adramyttium
- Adrasus
- Adulis
- Aeca
- Aeclanum
- Aegae
- Aegeae
- Aegina
- Aela
- Aeliae
- Aemona
- Aenus
- Aëtus
- Aezani
- Africa
- Afufenia
- Agathonice
- Agathopolis
- Agbia (Africa)
- Aggar
- Aggersel
- Agnus
- Agrippias
- Aguntum
- Alabanda
- Ala Miliaria
- Alava
- Alba
- Alba Maritima
- Albulae
- Aleria
- Alexandria Minor
- Alexanum
- Algiza
- Alia
- Aliezira
- Alinda
- Allegheny
- Alphocranon
- Altava
- Altiburus (Africa)
- Altinum
- Alton
- Amadassa
- Amaia
- Amantia
- Amasea
- Amastris
- Amathus in Cypro
- Amathus in Palaestina
- Amaura
- Ambia
- Amblada
- Amida (Ecclesiae Catholicae Armena et Syriaca)
- Amisus
- Amiternum
- Ammaedara
- Ammoniace
- Amorium
- Amphipolis
- Ampora
- Amudarsa
- Amyzon
- Anaea
- Anasartha
- Anastasiopolis
- Anatetarte
- Anazarbus
- Anbar (Ecclesia Catholica Chaldaea)
- Anchialus
- Ancusa
- Ancyra (Ecclesia Armena Catholica et Ecclesia Latina)
- Ancyra Ferrea
- Andeda
- Andrapa
- Andropolis
- Anemurium
- Anglona, Pandosia
- Anineta
- Antaeopolis
- Antandrus
- Antarados
- Anthedon
- Antigonea
- Antiphellus
- Antiphrae
- Antinoë
- Antiochia ad Maeandrum
- Antiochia in Pisidia
- Antiochia Parva
- Antipatris
- Antipyrgos
- Antium
- Apamea Cibotus
- Apamea in Bithynia
- Apamea in Syria (Maronite Church, Melkite Catholic Church and Syriac Catholic Church)
- Aperlae
- Aphnaeum
- Aphroditopolis
- Apisa Maius (Africa)
- Apollonia
- Apollonia Salbace
- Apollonias
- Apollonis
- Apollonopolis Magna
- Apollonopolis Parva
- Apollonos-Hieron
- Appia
- Appiaria
- Aprus
- Apta
- Aptuca (Africa)
- Aquae Albae in Byzacena
- Aquae Albae in Mauretania
- Aquae in Byzacena
- Aquae in Dacia
- Aquae in Mauretania
- Aquae in Numidia
- Aquae in Proconsulari (Africa)
- Aquae Flaviae
- Aquae Novae in Numidia
- Aquae Novae in Proconsulari (Africa proconsularis)
- Aquae Regiae
- Aquae Sirenses
- Aquae Thibilitanae
- Aquaviva
- Aquileia Patriarchate (in Italy)
- Aquipendium
- Arabia
- Arabissus
- Arad
- Aradi
- Aradus
- Arae in Mauretania
- Arae in Numidia
- Arausio
- Araxa
- Arba
- Arbanum
- Arcadia
- Arcadiopolis in Asia
- Arcadiopolis in Europa
- Arca in Armenia
- Arca in Phoenicia (Latin Church and Maronite Church)
- Arcavica
- Archelaïs
- Ardamerium
- Árd Carna
- Árd Mór
- Árd Sratha
- Arena
- Areopolis
- Arethusa (Latin Church and Syriac Catholic Church)
- Argos
- Ariarathia
- Ariassus
- Arindela
- Arisitum
- Aristium
- Arna
- Arneae
- Arpi
- Arsacal
- Arsamosata
- Arsennaria
- Arsinoë in Arcadia
- Arsinoë in Cypro
- Artvin (Armenian Catholic Church)
- Arycanda
- Ascalon
- Aspendus
- Aspona
- Assava
- Assuras
- Assus
- Astigi
- Astypalaea
- Asuoremixta
- Atella
- Atenia
- Athribis
- Ath Truim
- Athyra
- Attaea
- Attalea in Lydia
- Attalea in Pamphylia
- Attanasus
- Attuda
- Auca
- Aufinium
- Augurus
- Augusta
- Augustopolis in Palaestina
- Augustopolis in Phrygia
- Aulon (Aulonensis)
- Aulon (Aulonitanus)
- Aureliopolis in Asia
- Aureliopolis in Lydia
- Aurocla
- Aurusuliana
- Ausafa
- Ausana (Africa)
- Ausuaga (Africa)
- Ausuccura
- Autenti
- Auzegera
- Auzia
- Aveia
- Africa Avensa (Africa)
- Avioccala (Africa)
- Avissa (Africa)
- Avitta Bibba
- Axomis
- Azotus
- Azura (diocese)
- Bahanna
- Babylon
- Babra
- Bacanaria
- Bacatha in Arabia
- Bacatha in Palaestina
- Badiae
- Bagai
- Bagis
- Balneoregium
- Baia
- Balanea
- Balbura
- Balecium
- Baliana
- Bamaccora
- Bapara
- Bararus
- Barata
- Barbalissus
- Barca
- Barcusus
- Bardstown
- Bareta
- Bargala
- Bargylia
- Barica
- Baris in Hellesponto
- Baris in Pisidia
- Basilinopolis
- Bassiana
- Basti
- Batnae (Syriac Catholic Church)
- Bavagaliana
- Beatia
- Bela
- Belabitene
- Belali
- Bellicastrum
- Belesasa
- Bencenna
- Benda
- Benepota
- Beneventum
- Bennefa
- Beroea
- Berenice
- Berissa
- Beroë
- Berrhoea
- Betagbara
- Bethleem
- Bettonium
- Bethzabda
- Beverlacum
- Biccari
- Bida
- Bigastro
- Bilta
- Binda
- Birtha
- Bisarchio
- Bisica
- Bistue
- Bisuldino
- Bitettum
- Bitylius
- Bizya
- Bladia
- Blanda Iulia
- Blaundus
- Blera
- Bonitza
- Bononia
- Bonusta
- Boreum
- Bosana
- Bosporus
- Bostra
- Botrys
- Botriana
- Brixellum
- Bria
- Briancio
- Britonia
- Briula
- Bruzus
- Brysis
- Bubastis
- Bubon
- Bucellus
- Budua
- Buffada
- Buleliana
- Bulgarophygum
- Bulla
- Bulla Regia
- Bulna
- Burca
- Bure
- Buruni
- Busiris
- Buslacena
- Butus
- Buthrotum
- Buxentum
- Byblus
- Cabarsussi
- Cabasa
- Cabellicum
- Cadi
- Caeciri
- Caelanum
- Caere
- Caesarea in Bithynia
- Caesarea in Cappadocia (Armenian Catholic Church and Melkite Catholic Church)
- Caesarea Philippi
- Caesarea in Mauretania
- Caesarea in Numidia
- Caesarea in Palaestina
- Caesarea in Thessalia
- Caesariana
- Caesaropolis
- Caffa
- Calama
- Caldas de Reyes
- Caliabria
- California
- Callinicum
- Callipolis
- Caloe
- Caltadria
- Calydon
- Calynda
- Camachus
- Campania
- Camplum
- Camuliana
- Canapium
- Canatha
- Candyba
- Cannae
- Canosa
- Cantanus
- Capitolias
- Capra
- Capreae
- Caprulae
- Capsa
- Capsus
- Caput Cilla
- Carac-Moba
- Carallia
- Cardabunta
- Cardicium
- Cariana
- Carini
- Carinola
- Carmeiano
- Carpasia
- Carpathus
- Carpentrassum
- Carrhae
- Carthage
- Cartennae
- Carystus
- Casae Calanae
- Casae in Numidia
- Casae in Pamphylia
- Casae Medianae
- Casae Nigrae
- Casius
- Cassandria
- Castabala
- Castello
- Castellum Iabar
- Castellum in Mauretania
- Castellum in Numidia
- Castellum Medianum
- Castellum Minus
- Castellum Ripae
- Castellum Tatroportus
- Castellum Tingitii
- Castellum Titulianum
- Castoria
- Castra Galbae
- Castra Martis
- Castra Nova
- Castra Severiana
- Castro di Puglia
- Castro di Sardegna
- Castrum
- Castulo
- Catabum Castra
- Cataquas
- Catrum
- Catula
- Caudium
- Caunus
- Cea
- Ceanannus Mór
- Cebarades
- Cedamusa
- Cediae
- Cefa
- Cefala
- Celerina
- Cellae in Mauretania
- Cellae in Proconsulari
- Cell Ausaille
- Cemerianus
- Cenae
- Cenculiana
- Centenaria
- Centuria
- Centuriones
- Ceramus
- Ceramussa
- Cerasa
- Cerasus
- Cerbali
- Cercina
- Ceretapa
- Cerynia
- Cernitza
- Cestrus
- Chaialum (Syro-Malabar Catholic Church)
- Chalcedonia
- Chalcis in Europa
- Chalcis in Graecia
- Chalcis in Syria
- Chariopolis
- Chelm
- Chersonesus in Creta
- Chersonesus in Europa
- Chersonesus in Zechia
- Chiemium
- Chimaera
- Choma
- Chonochora
- Chullu
- Chunavia
- Christianopolis
- Christopolis
- Chrysopolis in Arabia
- Chrysopolis in Macedonia
- Chusra
- Chytri
- Cibalae
- Cibaliana
- Cibyra
- Cidramus
- Cidyessus
- Cilibia
- Cillium
- Cincari
- Cinna
- Cinnaborium
- Cynopolis in Aegypto
- Cynopolis in Arcadia
- Circesium
- Cisamus
- Ciscissus
- Cissa
- Cissi
- Cissita
- Citharizum
- Citium
- Citrus
- Città Ducale
- Cius
- Civitate
- Claneus
- Claternae
- Claudiopolis in Isauria
- Claudiopolis in Honoriade
- Clazomenae
- Cleopatris
- Cluain Iraird
- Cluentum
- Clypia
- Clysma
- Cnidus
- Cnossus
- Codaca
- Codrula
- Coela
- Coeliana
- Colbasa
- Colophon
- Colonia in Armenia
- Colonia in Cappadocia
- Colossae
- Columnata
- Colybrassus
- Comama
- Comana Armeniae
- Comana Pontica
- Comba
- Conana
- Concordia in America
- Cone
- Constantia in Arabia
- Constantia in Thracia
- Constantina
- Coprithis
- Coptus
- Coracesium
- Corada
- Corbavia
- Corinthus
- Corna
- Corniculana
- Corone
- Coronea
- Coropissus
- Corycus
- Corydala
- Cos
- Cotenna
- Cotrada
- Cotyaeum
- Cova
- Cozyla
- Cratia
- Cremna
- Crepedula
- Cresima
- Croae
- Cubda
- Cufruta
- Cucusus
- Cuicul
- Culusi
- Cuncacestre
- Cunga Féichin
- Cumae
- Curium
- Cursola
- Curubis
- Cures Sabinorum
- Cusae
- Cyanae
- Cybistra
- Cyme
- Cyparissia
- Cypsela
- Cyrene
- Cyrrhus
- Cyzicus
- Dadibra
- Dadima
- Dagnum
- Daimlaig
- Daldis
- Dalisandus in Isauria
- Dalisandus in Pamphylia
- Damascus
- Damiata (Melkite Catholic Church)
- Danaba
- Daonium
- Daphnusia
- Daphnutium
- Dara (Syriac Catholic Church)
- Dardanus
- Darnis
- Dascylium
- Daulia
- Dausara
- Decoriana
- Demetrias
- Derbe
- Dercos
- Deultum
- Diana
- Dianum
- Dices
- Diocaesarea in Isauria
- Diocaesarea in Palaestina
- Dioclea
- Diocletiana
- Diocletianopolis in Palaestina
- Diocletianopolis in Thracia
- Diocletianopolis in Thebaide
- Dionysias
- Dionysiana
- Dionysiopolis
- Dioshieron
- Diospolis Inferior
- Diospolis in Thracia
- Diospolis Superior
- Dium
- Doara (Eastern Catholic Churches)
- Doberus
- Docimium
- Doclea
- Dodona
- Dolia
- Doliche
- Dometiopolis
- Domnach Sechnaill
- Dora
- Dorylaeum
- Dragobitia
- Dragonara
- Drivastum
- Drizipara
- Drua
- Drusiliana
- Dumium
- Dystis
- Eanach Dúin
- Electa
- Ecdaumava
- Echinus
- Ecsalus
- Edessa in Macedonia
- Edessa in Osrhoëne (Melkite Catholic Church and Syriac Catholic Church
- Edistiana
- Egabro
- Egara
- Egnatia
- Egnazia Appula
- Eguga
- Elaea
- Elatea
- Elephantaria in Mauretania
- Elephantaria in Proconsulari
- Elepla
- Eleutherna
- Eleutheropolis in Macedonia
- Eleutheropolis in Palaestina
- Elicroca
- Elis
- Elmhama
- Elo
- Elusa
- Elvas
- Eminentiana
- Emmaüs
- Enera
- Ephesus
- Epidaurum
- Epiphania in Cilicia
- Epiphania in Syria
- Equilium
- Equizetum
- Eraclea
- Erdonia
- Eressus
- Eriza
- Erra
- Erythrae
- Erythrum
- Erzerum (Armenian Catholic Church)
- Esbus
- Etenna
- Euaza
- Euchaitae
- Eucarpia
- Eudocia
- Eudocias
- Eudoxias
- Eumenia
- Euroea in Epiro
- Euroea in Phoenicia
- Europus
- Eutyme
- Ezero
- Falerii
- Falerone
- Fallaba
- Famagusta
- Fata
- Faustinopolis
- Febiana
- Feradi Maius
- Feradi Minus
- Ferentium
- Fesseë
- Ficus
- Fidenae
- Fidoloma
- Filaca
- Fiorentino
- Fissiana
- Flavias
- Flumenpiscense
- Flenucleta
- Floriana
- Flumenzer
- Foratiana
- Forconium
- Forma
- Formiae
- Forontoniana
- Forum Flaminii
- Forum Novum
- Forum Popilii
- Forum Traiani
- Fundi
- Frequentium
- Fronta
- Fuerteventura
- Furnos Maior
- Furnos Minor
- Fussala
- Gabae
- Gabala
- Gabii
- Gabula
- Gadara
- Gadiaufala
- Gaguari
- Galazia in Campania
- Gallesium
- Galtelli
- Gangra
- Garba
- Gardar
- Garella
- Gargara
- Garriana
- Gaudiaba
- Gauriana
- Gaza
- Gazera
- Gegi
- Gemellae in Byzacena
- Gemellae in Numidia
- Gera
- Gerara
- Gerasa
- Gergis
- Germa in Hellesponto
- Germa in Galatia
- Germania in Dacia
- Germania in Numidia
- Germanicia
- Germaniciana
- Germanicopolis
- Germia
- Gibba
- Gigthi
- Gilba
- Gindarus
- Girba
- Giru Marcelli
- Giru Mons
- Girus
- Girus Tarasii
- Gisipa
- Giufi
- Giufi Salaria
- Glastonia
- Glavinitza
- Glenndálocha
- Gomphi
- Gor
- Gordus
- Gordoserba
- Gortyna
- Gradisca
- Gradum
- Grass Valley
- Gratiana
- Gratianopolis
- Gravelbourg
- Grumentum
- Guardialfiera
- Gubaliana
- Gummi in Byzacena
- Gummi in Proconsulari
- Gunela
- Gunugus
- Gurza
- Guzabeta
- Hadrianae
- Hadriani ad Olympum
- Hadriania
- Hadrianopolis in Haemimonto
- Hadrianopolis in Epiro
- Hadrianopolis in Honoriade
- Hadrianopolis in Pisidia
- Hadrianotherae
- Hadrumetum
- Halicarnassus
- Harpasa
- Hebron
- Helenopolis in Bithynia
- Helenopolis in Palaestina
- Heliopolis in Augustamnica
- Heliopolis in Phoenicia
- Heliosebaste
- Helos
- Hemeria
- Hemesa
- Hephaestus
- Heraclea ad Latmum
- Heraclea in Europa
- Heraclea Pelagoniae
- Heraclea Pontica
- Heraclea Salbace
- Heracleopolis Magna
- Herdonia
- Hermiana
- Hermocapelia
- Hermonthis
- Hermopolis Parva
- Hexamilium
- Hierapolis in Isauria
- Hierapolis in Phrygia
- Hierapolis in Syria (Melkite Catholic Church and Syriac Catholic Church)
- Hierapytna
- Hierissus
- Hierocaesarea
- Hieron
- Hieropolis
- Hierpiniana
- Hilta
- Hippo Diarrhytus
- Hirina
- Hirta
- Hispellum
- Hodelm (Hoddam)
- Hólar
- Homona
- Horaea
- Horrea
- Horrea Aninici
- Horrea Coelia
- Horreomargum
- Horta
- Hortanum, Horta
- Hospita
- Hyccara
- Hyda in Lycaonia
- Hyllarima
- Hypaepa
- Hypselis
- Hyrcanis
- Iabruda
- Iamnia
- Iasus
- Ibora
- Iconium
- Ida in Mauretania
- Idassa
- Idebessus
- Idicra
- Ieper
- Ierafi
- Ierichus
- Igilgilli
- Ilistra
- Iliturgi
- Ilium
- Illici
- Ingila
- Inis Cathaig
- Insula
- Intervallum
- Iomnium
- Ionopolis
- Ioppe
- Ios
- Iotapa in Isauria
- Iotapa in Palaestina
- Ipagro
- Ipsus
- Irenopolis in Cilicia
- Irenopolis in Isauria
- Iria Flavia
- Isauropolis
- Isba
- Isinda
- Ita
- Italica
- Iubaltiana
- Iucundiana
- Iuliopolis
- Iulium Carnicum
- Iunca in Byzacena
- Iunca in Mauretania
- Iziriana
- Izirzada
- Labicum
- Lacedaemonia
- Lacubaza
- Lagania
- Lagina
- La Imperial
- Lamasba
- Lambaesis
- Lambiridi
- Lamdia
- Lamia
- Lamiggiga
- Lamphua
- Lampsacus
- Lamsorti
- Lamus
- Lamzella
- Laodicea ad Libanum
- Laodicea Combusta
- Laodicea in Phrygia
- Laodicea in Syria
- Lapda
- Lapithus
- Lappa
- Laranda
- Lares
- Lari Castellum
- Larissa in Syria
- Larissa in Thessalia
- Latopolis
- Lauriacum
- Lauzadus
- Lavellum
- Lead
- Leavenworth
- Lebedus
- Lebessus
- Leges
- Legia
- Legis Volumni
- Lemellefa
- Lemfocta
- Lemnus
- Leontium
- Leontopolis in Augustamnica
- Leontopolis in Pamphylia
- Leptiminus
- Leptis Magna
- Lerus
- Lesina
- Lestrona
- Lesvi
- Lete
- Letopolis
- Leucas
- Leuce
- Liberalia
- Libertina
- Lidoricium
- Lilybaeum
- Limata
- Limisa
- Limnae
- Limyra
- Lindisfarne
- Linoë
- Lipara
- Lititza
- Litomyšl
- Litterae
- Livias
- Lizicus
- Lorium
- Loryma
- Lugmad
- Lugura
- Lunda
- Luni
- Lupadium
- Luperciana
- Luxemburgum
- Lycaonia
- Lydda
- Lyrbe
- Lysias
- Lysinia
- Lystra
- Macomades
- Macomades Rusticiana
- Macon
- Macra
- Macri
- Macriana in Mauretania
- Macriana Maior
- Macriana Minor
- Mactaris
- Madarsuma
- Madaurus
- Mades
- Madytus
- Maeonia
- Magarmel
- Mageó
- Magnesia ad Maeandrum
- Magnesia ad Sipylum
- Magnetum
- Magydus
- Maillezais
- Maina
- Maiuca
- Maiumas Gazae
- Malliana
- Mallus
- Malus
- Manaccenser
- Maraguia
- Marasc (Armenian Catholic Church)
- Marazanae
- Marazanae Regiae
- Marcelliana
- Marciana
- Marcianopolis
- Marcopolis
- Mardin (Armenian Catholic Church, Chaldean Catholic Church, and Syriac Catholic Church)
- Mareotes
- Margum
- Mariamme
- Mariana in Corsica
- Marianopolis in Michigania
- Marida
- Marmarizana
- Maronana
- Maronea
- Martanae Tudertinorum
- Martirano
- Martyropolis
- Masclianae
- Mascula
- Massa Lubrense
- Mastaura in Asia
- Mastaura in Lycia
- Masuccaba
- Materiana
- Mathara in Numidia
- Mathara in Proconsulari
- Matrega
- Mattiana
- Maturba
- Maura
- Mauriana
- Maximianae
- Maximiana in Byzacena
- Maximiana in Numidia
- Maximianopolis in Arabia
- Maximianopolis in Palaestina
- Maximianopolis in Pamphylia
- Maximianopolis in Rhodope
- Maximianopolis in Thebaide
- Maxita
- Maxula Prates
- Mazaca
- Medaba
- Medea
- Medeli
- Media
- Mediana
- Medianas Zabuniorum
- Megalopolis in Peloponneso
- Megalopolis in Proconsulari
- Megara
- Mela
- Melitene (Armenian Catholic Church and Latin Church)
- Meloë in Isauria
- Meloë in Lycia
- Melzi
- Membressa
- Memphis
- Menefessi
- Menelaites
- Menois
- Mentesa
- Mercia
- Merus
- Mesarfelta
- Mesembria
- Mesotymolus
- Messene
- Meta
- Metaba
- Metelis
- Metellopolis
- Methone
- Methymna
- Metrae
- Metropolis in Asia
- Metropolis in Pisidia
- Metropolis of Kastoria
- Mevania
- Mibiarca
- Midaëum
- Midica
- Mididi
- Midila
- Migirpa
- Miletopolis
- Miletus
- Milevum
- Mimiana
- Mina
- Minervium
- Minora
- Minturnae
- Misenum
- Missua
- Misthia
- Mitylene
- Mizigi
- Mnizus
- Mocissus
- Modra
- Modruš
- Moglaena
- Molicunza
- Monembasia
- Mons in Mauretania
- Mons in Numidia
- Montecorvino
- Montefiascone
- Monterano
- Monteverde
- Mopsuestia
- Mopta
- Morosbisdus
- Mossyna
- Mostene
- Mosynopolis
- Motula
- Moxori
- Mozotcori
- Mulia
- Mulli
- Munatiana
- Mundinitza
- Municipa
- Murcona
- Murthlacum
- Murustaga
- Musbanda
- Mush (Armenian Catholic Church)
- Musti
- Musti in Numidia
- Muteci
- Mutia
- Mutugenna
- Muzuca in Byzacena
- Muzuca in Proconsulari
- Mylasa
- Myndus
- Myra (Melkite Catholic Church and Latin Church)
- Myrica
- Myrina
- Nabala
- Nachingwea
- Nacolia
- Naiera
- Naissus
- Nara
- Naraggara
- Naratcata
- Narona
- Nasai
- Nasala
- Nasbinca
- Natchesium
- Natchitoches
- Naucratis
- Nauplia
- Nazianzus
- Nationa
- Nea Aule
- Neapolis in Arabia
- Neapolis in Caria
- Neapolis in Cypro
- Neapolis in Isauria
- Neapolis in Palaestina
- Neapolis in Pisidia
- Neapolis in Proconsulari
- Nea Valentia
- Nebbi
- Nebbio
- Neila
- Neocaesarea (episcopal see)
- Neocaesarea in Bithynia
- Neocaesarea in Ponto
- Neocaesarea in Syria
- Novae Patrae
- Nepeta
- Nepte
- Nesqually
- Neve
- Newport
- Nicaea
- Nicaea Parva
- Nicius
- Nicives
- Nicomedia
- Nicolopolis ad Iaterum
- Nicopolis ad Nestum
- Nicopolis in Armenia
- Nicopolis in Epiro
- Nicopsis
- Nicosia
- Nigizubi
- Nigrae Maiores
- Nilopolis
- Nisa in Lycia
- Nisibis (Chaldean Catholic Church and Maronite Catholic Church)
- Nisyrus
- Noba
- Nomentum
- Nona
- Nova
- Nova Barbara
- Nova Caesaris
- Nova Germania
- Novaliciana
- Nova Petra
- Nova Sinna
- Nova Sparsa
- Novae
- Novi
- Novica
- Nubia
- Numana or Humana
- Numericus
- Numida
- Numluli
- Nysa in Asia
- Nyssa
- Oasis Magna
- Obba
- Obori
- Oca
- Octaba
- Octabia
- Octava
- Odessus
- Oëa
- Oenoanda
- Oescus
- Olba
- Olbia
- Olena
- Olympus
- Oliva
- Ombi
- Onchesmus
- Onuphis
- Opitergium
- Opus
- Oppidum Consillinum
- Oppidum Novum
- Orcistus
- Oregon City
- Oreus
- Oreto
- Orthosias in Caria
- Orthosias in Phoenicia
- Orymna
- Ostra
- Ostracine
- Othana
- Othona
- Otriculum
- Otrus
- Ottocium
- Oxyrhynchus
- Pachnemunis
- Paestum
- Paphus
- Palaeopolis in Asia
- Palaeopolis in Pamphylia
- Palmyra
- Paltus
- Pamphilus
- Panatoria
- Penephysis
- Pandosia, Anglona
- Panemotichus
- Panium
- Panopolis
- Pappa
- Paraetonium
- Paralus
- Parembolae in Arabia
- Parembolae in Palaestina
- Paria
- Parium
- Parlais
- Parthenia
- Parus
- Patara
- Patrae
- Pausulae
- Pauzera
- Pedachtoë
- Pederodiana
- Pegae
- Pella
- Pelte
- Pelusium (Latin Church and Melkite Catholic Church)
- Poemanenum
- Penafiel
- Perdices
- Pergamum
- Perge
- Peristasis
- Peritheorium
- Perperene
- Perrhe
- Pertusa
- Pessinus
- Petina
- Petinessus
- Pednelissus
- Petra in Aegypto
- Petra in Lazica
- Petra in Palaestina
- Phacusa
- Phaena
- Pharan
- Pharbaetus
- Pharsalus
- Phaselis
- Phasis
- Phatanus
- Phelbes
- Phellus
- Philadelphia in Arabia
- Philadelphia in Lydia
- Philadelphia Minor
- Philae
- Philippi
- Philippopolis in Arabia
- Philippopolis in Thracia
- Philomelium
- Phoba
- Phocaea
- Phoenice
- Photice
- Phragonis
- Phulli
- Phytea
- Pia
- Pinara
- Pinhel
- Pionia
- Pisita
- Pitanae
- Plataea
- Platamon
- Plestia
- Ploaghe
- Plotinopolis
- Pocofeltus
- Podalia
- Poetovium
- Pogla
- Polemonium
- Polybotus
- Polinianum
- Polymartium
- Polystylus
- Pomaria
- Pompeiopolis in Cilicia
- Pompeiopolis in Paphlagonia
- Populonia
- Porphyreon
- Porthmus
- Potentiz in Piceno
- Praesidium
- Precausa
- Prenetus
- Preslavus
- Priene
- Privata
- Proconnesus
- Prostanna
- Prusa (Armenian Catholic Church and Latin Church)
- Prusias ad Hypium
- Prymnessus
- Pselchis
- Psibela
- Ptolemais in Libya
- Ptolemais in Phoenicia (Latin Church and Maronite Church)
- Ptolemais in Thebaide
- Pudentiana
- Pulcheriopolis
- Pumentum
- Pupiana
- Puppi
- Putia in Byzacena
- Putia in Numidia
- Pyrgos
- [[Q==
- Quaestoriana, Byzacena (Tunisia)
- Quincy, no Roman province (Illinois, USA)
- Quiza, Mauretania Caesariensis (El-Benian, Algeria)
- Rachlea
- Raphanea
- Raphia
- Ramsbiria
- Rapidum
- Ratiaria
- Rebellum
- Regiana
- Regiae
- Remesiana
- Reperi
- Respecta, Numidia
- Ressiana
- Rew-Ardashir (Chaldean Catholic Church)
- Rhaedestus
- Rhandus
- Rhasus
- Rhesaina
- Rhinocorura
- Rhizaeum
- Rhodiapolis
- Rhodopolis
- Rhoga
- Rhoina
- Rhosus
- Rhusium
- Risinium
- Ros Cré
- Rota
- Rossmarkaeum
- Rotaria
- Rotdon
- Rubicon
- Rufiniana
- Rusada
- Rusguniae
- Rusellae
- Rusicade
- Ruspae
- Rusubbicari
- Rusubisir
- Rusuca
- Rusuccuru (Titular See)
- Rutabo
- Sabadia
- Sebana
- Sabrata
- Saepinum
- Saesina
- Saetabis
- Sagalassus
- Sagone
- Saia Maior
- Saint-Papoul
- Sais
- Saittae
- Sala
- Salamias
- Salamis
- Saldae
- Salona
- Salapia
- Samos
- Samosata
- Sanavus
- Sanctus Germanus
- Sanitium
- San Leone
- Santa Giusta
- Sarda
- Sardes
- Sarepta (Latin Church and Maronite Church)
- Sariphaea
- Sarsenterum
- Sasabe
- Sassura
- Sata
- Satafi
- Satafis
- Satala in Armenia
- Satala in Lydia
- Satrianum
- Sauatra
- Sbida
- Scala
- Scsampa
- Scardona
- Scarphea
- Scebatiana
- Scepsis
- Schedia
- Sciathus
- Scilium
- Scopelus in Haemimonto
- Scopelus in Thessalia
- Scutarium
- Scyrus
- Scythopolis
- Sebarga
- Sebaste (Armenian Catholic Church)
- Sebastea
- Sebaste in Cilicia
- Sebaste in Phrygia
- Sebaste in Palaestina
- Sebastopolis in Abasgia
- Sebastopolis in Armenia
- Sebastopolis in Thracia
- Sebela
- Sebennytus
- Seert (Chaldean Catholic Church)
- Segermes
- Segia
- Segisama
- Seina
- Sela
- Selemselae
- Selendeta
- Seleucia in Isauria
- Seleucia Ferrea
- Seleucia Pieria
- Seleuciana
- Seleucobelus
- Selge
- Selia
- Selinus
- Selsea
- Selymbria
- Semina
- Semnea
- Semta
- Serbia
- Sereddeli
- Sergentza
- Sergiopolis
- Serigene
- Serra
- Serrae
- Serta
- Sesta
- Setea
- Sethroë
- Septimunicia
- Severiana
- Sfasferia
- Sibidunda
- Siblia
- Sicca Veneria
- Siccenna
- Siccesi
- Sicilibba
- Syca
- Sicyon
- Side
- Sidnacestre
- Sidon
- Sidyma
- Sigus
- Sila
- Silandus
- Silli
- Silyum
- Simidicca
- Simingi
- Siminina
- Simitthu
- Sinda
- Siniandus
- Sinitis
- Sinna
- Sinnada in Mauretania
- Sinnipsa
- Sinnuara
- Sinope
- Sion
- Sita
- Sitifis
- Sitipa
- Skálholt
- Slebte
- Socia
- Soldaia
- Soli
- Sophene
- Sora
- Sorres
- Soteropolis
- Sozopolis in Haemimonto
- Sozopolis in Pisidia
- Sozusa in Libya
- Sozusa in Palaestina
- Stadia
- Stagnum
- Stagoi
- Stauropolis
- Stephaniacum
- Stectorium
- Stobi
- Strathernia
- Stratonicea in Caria
- Stratonicea in Lydia
- Strongoli
- Strongyle
- Strumnitza
- Suacia
- Suas
- Suava
- Subaugusta
- Subbar
- Subrita
- Sucarda
- Succuba
- Suelli
- Sufar
- Sufasar
- Sufes
- Sufetula
- Sugdaea
- Sulci
- Suliana
- Sullectum
- Summa
- Summula
- Sura
- Surista
- Sutrium
- Sutunura
- Sycomazon
- Syedra
- Syene
- Synaus
- Synnada in Phrygia
- Tabae
- Tabaicara, Mauretania Caesariensis
- Tabala, Lydia
- Tabalta
- Tabbora
- Tabla, Mauretania Caesariensis
- Taborenta, Mauretania Caesariensis
- Tabuda, Numidia
- Tabunia, Mauretania Caesariensis
- Tacapae
- Tacarata, Numidia
- Tacia Montana, Africa (Roman province)
- Tadamata
- Taddua
- Tagarata
- Tagarbala
- Tagaria
- Tagase
- Tagritum (Syriac Catholic Church)
- Taium
- Talaptula
- Tamada
- Tamagrista
- Tamallula
- Tamalluma
- Tamascani
- Tamasus
- Tamata
- Tamazeni
- Tamazuca
- Tambeae
- Tamiathis
- Tanagra
- Tanais
- Tanaramusa
- Tanis
- Tanudaia
- Taparura
- Tapasa
- Taraqua
- Tarasa in Byzacena
- Tarasa in Numidia
- Tarsus (Latin Church, Maronite Church, and Melkite Catholic Church)
- Tasaccora
- Tatilti
- Taua
- Taurianum
- Tauromenium
- Tavium
- Tegea
- Teglata in Numidia
- Teglata in Proconsulari
- Tela
- Telde
- Tell-Mahrê
- Telmissus
- Temenothyrae
- Temnus
- Temuniana
- Tenedus
- Tentyris
- Teos
- Tepelta
- Terenuthis
- Termessus
- Ternobus
- Tetci
- Teuchira
- Thabraca
- Thagamuta
- Thagaste
- Thagora
- Thala
- Thamugadi
- Thapsus
- Tharros
- Thasbalta
- Thasus
- Thaumacus
- Thebae
- Thebae Phthiotides
- Thelepte
- Themisonium
- Thenae
- Thennesus
- Theodoropolis
- Theodosiopolis in Arcadia
- Theodosiopolis in Armenia
- Thermae Basilicae
- Thermae Himerae
- Thérouanne
- Thespiae
- Thessalonica
- Theudalis
- Theuzi
- Theveste
- Thiava
- Thibaris
- Thibica
- Thibilis
- Thibiuca
- Thibuzabetum
- Thiges
- Thignica
- Thimida
- Thimida Regia
- Thinis
- Thinisa in Numidia
- Thisiduo
- Thizica
- Thmuis
- Thois
- Thubunae in Numidia
- Thuburbo Maius
- Thuburbo Minus
- Thuburnica
- Thubursicum
- Thubursicum-Bure
- Thuccabora
- Thucca in Mauretania
- Thucca in Numidia
- Thucca Terebenthina
- Thugga
- Thunigaba
- Thunudruma
- Thunusuda
- Thurio
- Thyatira
- Thysdrus
- Tiberias
- Tiberiopolis
- Tiburnia
- Tiddi
- Tigamibena
- Tigava
- Tigias
- Tigillava
- Tigimma
- Tigisi in Mauretania
- Tigisi in Numidia(Aïn-El-Bordj)
- Tiguala
- Timici
- Timidana
- Tingaria
- Tinis in Proconsulari
- Tinista
- Tinum
- Tipasa in Mauretania
- Tipasa in Numidia
- Tisedi
- Tisili
- Titiopolis
- Tituli in Numidia
- Tituli in Proconsulari
- Tityassus
- Tium
- Tlos
- Tokat (Armenian Catholic Church)
- Tomi
- Tongeren/Tongres
- Torcello
- Tortibulum
- Tracula
- Tragurium
- Traianopolis in Phrygia
- Traianopolis in Rhodope
- Traiectum ad Mosam
- Tralles in Asia
- Tralles in Lydia
- Transmarisca
- Trapezopolis
- Trapezus (Latin Church and Armenian Catholic Church)
- Treba
- Trebenna
- Trebia
- Trecalae
- Tremithus
- Tres Tabernae
- Trevico
- Tricca
- Tripolis in Lydia
- Tripolis in Phoenicia
- Trisipa
- Troas
- Trocmades
- Troezene
- Trofimiana
- Troyna
- Truentum
- Tubernuca
- Tubia
- Tubulbaca
- Tubunae in Mauretania
- Tubusuptu
- Tubyza
- Tucci
- Tulana
- Tullia
- Tunes (Tunis, Tunisia)
- Tunnuna
- Turres Ammeniae, Numidia
- Turres Concordiae, Numidia
- Turres in Byzacena, Byzacena
- Turres in Numidia, Numidia
- Turrisblanda, (Africa) Byzacena
- Turris in Mauretania, Mauretania Caesariensis
- Turris in Proconsulari, Africa Proconsularis
- Turris Rotunda
- Turris Tamalleni
- Turuda
- Turuzi
- Tuscamia
- Tuscania
- Tusuros
- Tyana
- Tymandus, Pisidia
- Tymbrias
- Tyndaris
- Tyriaeum, Pisidia
- Tyrus (Lebanon)
- Tzernicus
- Ubaba
- Ubaza
- Uccula
- Uchi Maius
- Ucres
- Ulcinium
- Ulpiana
- Ululi
- Umbriatico
- Unizibira
- Uppenna
- Urbs Salvia
- Urci
- Urima
- Ursona
- Urusi
- Usinaza
- Usula
- Uthina
- Utica
- Utimma
- Utimmira
- Uzalis
- Uzippari
- Uzita
- Vada
- Vadesi
- Vaga
- Vagadensi
- Vagal
- Vageata
- Vagrauta
- Vaison
- Valabria
- Valentiniana
- Valentia
- Valeria
- Valliposita
- Vallis
- Vamalia
- Vanariona
- Vannida
- Vardimissa
- Vartana
- Vasada
- Vassinassa
- Vatarba
- Vazari
- Vazari-Didda
- Vazi-Sarra
- Vegesela in Byzacena
- Vegesela in Numidia
- Velebusdus
- Velefi
- Velia
- Velicia
- Verbe
- Vergi
- Verinopolis
- Verissa
- Verrona
- Vertara
- Vescera
- Vibiana
- Vibo
- Vico Equense
- Voghenza
- Victoriana
- Vicus Aterii
- Vicus Augusti
- Vicus Caesaris
- Vicus Pacati
- Vicus Turris
- Villamagna in Proconsulari
- Villamagna in Tripolitania
- Villa Nova
- Villa Regis
- Viminacium
- Vina
- Vincennes
- Vinda
- Virunum
- Vissalsa
- Vita
- Voli
- Volsinium
- Volturnum
- Voncaria
- Voncariana
- Vulturaria
- Vulturia