Diocese of Egypt

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Diocese of Egypt
Dioecesis Aegypti
Διοίκησις Αἰγύπτου
Diocese of the Byzantine Empire
ca. 381 – 539

The Diocese of Egypt c. 400.
CapitalAlexandria
Historical eraLate Antiquity
• Separation from the Diocese of the East
ca. 381
• Diocese abolished by emperor Justinian I.
539
Preceded by
Roman Egypt
Today part of Egypt
 Libya

The Diocese of Egypt (

Muslim conquest of Egypt
in the 640s.

Administrative history

Egypt was formed into a separate diocese in about 381.[1] According to the Notitia Dignitatum, which for the Eastern part of the Empire dates to ca. 401, the diocese came under a vicarius of the praetorian prefecture of the East, with the title of praefectus augustalis, and included six provinces:[2][3]

  • Aegyptus (western Nile delta), originally established in the early 4th century as Aegyptus Iovia, under a praeses
  • Augustamnica (eastern Nile delta), originally established in the early 4th century as Aegyptus Herculia, under a corrector
  • Arcadia (central), established ca. 397 and having previously briefly listed in the 320s as Aegyptus Mercuria, under a praeses
  • Thebais
    (southern), under a praeses
  • Libya Inferior
    or Libya Sicca, under a praeses
  • Libya Superior
    or Pentapolis, under a praeses

Parallel to the civil administration, the Roman army in Egypt had been placed under a single general and military governor styled

Anastasius I the comitatenses field army came under the command of the magister militum per Orientem, and the palatini (guards) under the two magistri militum praesentales in Constantinople.[5]

The comes limitis Aegypti enjoyed great power and influence in the diocese, rivalling that of the praefectus augustalis himself. From the 5th century, the comes is attested as exercising some civilian duties as well, and from 470 on, the offices of comes and praefectus augustalis were sometimes combined in a single person.[6]

This tendency to unite civil and military authority was formalized by Justinian I in his 539 reform of Egyptian administration. The diocese was effectively abolished, and regional ducats established, where the presiding dux et augustalis was placed above the combined civil and military authority:[6][7]

  • dux et augustalis Aegypti, controlling Aegyptus I and Aegyptus II
  • dux et augustalis Thebaidis, controlling Thebais superior and Thebais inferior
  • Augustamnica I and Augustamnica II were likewise probably — the relevant portion of the edict is defective — were placed under a single dux et augustalis
  • in the two Libyan provinces, the civil governors were subordinated to the respective dux
  • Arcadia remained under its praeses, probably subordinated to the dux et augustalis Thebaidos, and a dux et augustalis Arcadiae does not appear until after the
    Persian occupation
    of 619–629.

Praefecti Augustalii of the Diocese

Taken from the Prosopography of the Later Roman Empire (except for Theognostus):

  • Eutolmius Tatianus (367-370)
  • Olympius Palladius (370-371)
  • Aelius Palladius (371-374)
  • Publius (c. 376)
  • Bassianus (c. 379)
  • Hadrianus (c. 379)
  • Iulianus (c. 380)
  • Antoninus (381-382)
  • Palladius (382)
  • Hypatius (383)
  • Optatus (384)
  • Florentius (384-386)
  • Paulinus (386-387)
  • Eusebius (387)
  • Flavius Ulpius Erythrius (388)
  • Alexander (388-390)
  • Evagrius (391)
  • Hypatius (392)
  • Potamius (392)
  • Orestes
    (415)
  • Theognostus (c. 482)[8]
  • Petrus Marcellinus Felix Liberius (c. 539-542)

See also

Notes

  1. ^ Palme 2007, p. 245.
  2. ^ Palme 2007, pp. 245–246.
  3. ^ Notitia Dignitatum, in partibus Orientis, I
  4. ^ Palme 2007, p. 247.
  5. ^ Palme 2007, pp. 247–248.
  6. ^ a b Palme 2007, p. 248.
  7. ^ Hendy 1985, pp. 179–180.

Sources