Pannonia Valeria

Provincial administration reformed and dioceses established by Diocletian, c. 293. Permanent praetorian prefectures established after the death of Constantine I. Empire permanently partitioned after 395. Exarchates of Ravenna and Africa established after 584. After massive territorial losses in the 7th century, the remaining provinces were superseded by the theme system in c. 640–660, although in Asia Minor and parts of Greece they survived under the latter until the early 9th century.

Diocese of Gaul: Alpes Poeninae et Graiae • Belgica I • Belgica II • Germania I • Germania II • Lugdunensis I • Lugdunensis II • Lugdunensis III • Lugdunensis IV • Maxima Sequanorum
Diocese of Vienne (later Septem Provinciae): Alpes Maritimae • Aquitanica I • Aquitanica II • Narbonensis I • Narbonensis II • Novempopulania • Viennensis
Diocese of Spain: Baetica • Balearica • Carthaginensis • Gallaecia • Lusitania • Mauretania Tingitana • Tarraconensis
Diocese of Britain: Britannia I • Britannia II • Flavia Caesariensis • Maxima Caesariensis • Valentia (369)

Diocese of Thrace: Europa • Haemimontus • Moesia II^§ • Rhodope • Scythia^§ • Thracia
Diocese of Asia*: Asia • Caria^§ • Hellespontus • Insulae^§ • Lycaonia (370) • Lycia • Lydia • Pamphylia • Pisidia • Phrygia Pacatiana • Phrygia Salutaria
Diocese of Pontus*: Armenia I* • Armenia II* • Armenia Maior* • Armenian Satrapies* • Armenia III (536) • Armenia IV (536) • Bithynia • Cappadocia I* • Cappadocia II* • Galatia I* • Galatia II Salutaris* • Helenopontus* • Honorias* • Paphlagonia* • Pontus Polemoniacus*
Diocese of the East: Arabia • Cilicia I • Cilicia II • Cyprus^§ • Euphratensis • Isauria • Mesopotamia • Osroene • Palaestina I • Palaestina II • Palaestina III Salutaris • Phoenice • Phoenice Libanensis • Syria I • Syria II Salutaris • Theodorias (528)
Diocese of Egypt: Aegyptus I • Aegyptus II • Arcadia • Augustamnica I • Augustamnica II • Libya Superior • Libya Inferior • Thebais Superior • Thebais Inferior