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| Diocese of Egypt Dioecesis Aegypti Διοίκησις Αἰγύπτου | |||||||
|---|---|---|---|---|---|---|---|
| Diocese of theByzantine Empire | |||||||
| c. 381 – 539 | |||||||
The Diocese of Egypt c. 400. | |||||||
| Capital | Alexandria | ||||||
| Historical era | Late Antiquity | ||||||
• Separation from theDiocese of the East | c. 381 | ||||||
• Diocese abolished by emperorJustinian I. | 539 | ||||||
| |||||||
| Today part of | Egypt Libya | ||||||
TheDiocese of Egypt (Latin:Dioecesis Aegypti;Greek:Διοίκησις Αἰγύπτου) was adiocese of the laterRoman Empire (from 395 theEastern Roman Empire), incorporating the provinces ofEgypt andCyrenaica. Its capital was atAlexandria, and its governor had the unique title ofpraefectus augustalis ("Augustal Prefect", of the rankvir spectabilis; previously the governor of the imperial 'crown domain' province Egypt) instead of the ordinaryvicarius. The diocese was initially part of theDiocese of the East, but in ca. 380, it became a separate entity, which lasted until its territories were overrun by theMuslim conquest of Egypt in the 640s.
Egypt was formed into a separate diocese in about 381.[1] According to theNotitia Dignitatum, which for the Eastern part of the Empire dates to ca. 401, the diocese came under avicarius of thepraetorian prefecture of the East, with the title ofpraefectus augustalis, and included six provinces:[2][3]
Parallel to the civil administration, the Roman army in Egypt had been placed under a single general and military governor styleddux (dux Aegypti et Thebaidos utrarumque Libyarum) in theTetrarchy. Shortly after the creation of Egypt as a separate diocese (between 384 and 391), the post evolved into thecomes limitis Aegypti, who was directly responsible forLower Egypt, while the subordinatedux Thebaidis was in charge of Upper Egypt (Thebais). In the middle of the 5th century, however, the latter was also promoted to the rank ofcomes (comes Thebaici limitis).[4] The two officers were responsible for thelimitanei (border garrison) troops stationed in the province, while until the time ofAnastasius I thecomitatenses field army came under the command of themagister militum per Orientem, and thepalatini (guards) under the twomagistri militum praesentales inConstantinople.[5]
Thecomes limitis Aegypti enjoyed great power and influence in the diocese, rivalling that of thepraefectus augustalis himself. From the 5th century, thecomes is attested as exercising some civilian duties as well, and from 470 on, the offices ofcomes andpraefectus augustalis were sometimes combined in a single person.[6]
This tendency to unite civil and military authority was formalized byJustinian I in his 539 reform of Egyptian administration. The diocese was effectively abolished, and regional ducats established, where the presidingdux et augustalis was placed above the combined civil and military authority:[6][7]
Taken from theProsopography of the Later Roman Empire (except for Theognostus):