Diocletian’s Praetorian Prefectures

1. PRAETORIAN PREFECTURE OF GALLIAE

DIOCESE OF GALLIA

    • Gallia Lugdunensis I
    • Gallia Lugdunensis II
    • Gallia Lugdunensis III
    • Gallia Lugdunensis IV
    • Belgica I
    • Gallia Belgica II
    • Germania I
    • Germania ii
    • Alpes Poeninae et Graiae
    • Maxima Sequanorum

DIOCESE OF VIENNENSIS

    • Viennensis
    • Alpes Maritimae
    • Aquitanica I
    • Aquitanica II
    • Novempopulana
    • Narbonensis I
      8Narbonensis II

DIOCESE OF HISPANIAE

    • Baetica
    • Baleares (Balearic Islands)
    • Carthaginiensis
    • arraconensis
    • allaecia
    • Lusitania
    • Mauretania
    • Tingitana or Hispania Nova

DIOCESE OF BRITANNIAE

2. PRAETORIAN PREFECTURE OF ITALY AND AFRICA

DIOCESE OF ITALIA SUBURBICARIA

    • Campania
    • Tuscania et Umbria
    • Picenum Suburbicarium
    • Apulia et Calabria
    • Bruttia et Lucania
    • Samnium
    • Valeria
    • Corsica
    • Sicilia
    • Sardinia

DIOCESE OF ITALIA ANNONARIA

    • Venetia and Istria
    • Aemilia
    • Liguria
    • Flaminia and Picenum Annonarium
    • Alpes Cottiae
    • Raetia I
    • Raetia II

DIOCESE OF AFRICA

    • Africa proconsularis or Zeugitana
    • Byzacena
    • Mauretania Caesariensis
    • Sitifensis
    • Numidia
    • Triploitana

3. PRAETORIAN PREFECTURE OF ILLYRICUM

DIOCESE OF PANNONIA

    • Dalmatia
    • Noricum Mediterraneum
    • Noricum Ripensis
    • Pannonia Prima
    • Pannonia Secunda
    • Savia
    • Valeria Ripensis

DIOCESE OF DACIA

    • Dacia Mediterranea
    • Moesia I
    • Praevalitana
    • Dardania
    • Dacia Ripensis

DIOCESE OF MACEDONIA

    • Macedonia Prima
    • Macedonia Salutaris (or Macedonia Secunda)
    • Thessalia
    • Epirus Vetus
    • Epirus Nova
    • Achaea
    • Creta

4. PRAETORIAN PREFECTURE OF ORIENS

DIOCESE OF THRACE

    • Europa
    • Thracia
    • Haemimontus
    • Rhodope
    • Moesia II
    • Scythia

DIOCESE OF ASIANA

    • Asia
    • Hellespontus (near Sea of Marmara)
    • Pamphylia
    • Caria
    • Lydia
    • Lycia
    • Lycaonia
    • Pisidia
    • Phrygia Pacatiana
    • Phrygia Salutaris

DIOCESE OF PONTUS

    • Bythinia
    • Galatia
    • Galatia Salutaris
    • Phaphlagonia
    • Honorias
    • Cappadocia I
    • CappadociaII
    • Helenopontus
    • Pontus Polemoniacus
    • Armenia I
    • Armenia II

DIOCESE OF ORIENS

    • Arabia
    • Palestina I
    • Palestina II
    • Palestina Salutaris
    • Syria I
    • Syria II
    • Phoenice
    • Phoenice Libanensis
    • Euphratensis
    • Osroene
    • Mesopotamia
    • Cilicia I
    • Cilicia II
    • Isauria
    • Corduene
    • Cyprus

DIOCESE OF AEGYPTUS

    • Aegyptus
    • Augustamnica
    • Thebais
    • Arcadia
    • Libya Superior
    • Libya Inferior

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