The province was instituted in
tetrarchic times under the name of
Aegyptus Herculia (for
Diocletian's colleague
Maximian), with ancient
Memphis as capital (315-325), but later re-merged in Aegyptus. In 341 the province was reconstituted, but the name was changed into
Augustamnica to remove pagan connotations. It consisted of the Eastern part of the
Nile Delta and the ancient
Heptanomia, and belonged to the
Diocese of Oriens. , with Augustamnica in the East. Augustamnica was the only Egyptian province under a
corrector, a lower ranking governor. Around 381 the provinces of Egypt become a diocese in their own right, and so Augustamnica became part of the Diocese of Egypt. Between 386 and the end of the 4th century the new province of
Arcadia Aegypti, named after Emperor
Arcadius, was created with territory from Augustamnica, the
Heptanomia; •
Ala secunda Ulpia Afrorum at Thaubasteos •
Ala secunda Aegyptiorum at Tacasiria, •
Cohors prima sagittariorum at Naithu •
Cohors prima Augusta Pannoniorum at Tohu, •
Cohors prima Epireorum at Castra Iudaeorum •
Cohors quarta Iuthungorum at Affroditus •
Cohors secunda Ituraeorum at Aiy •
Cohors secunda Thracum at Muson •
Cohors quarta Numidarum at Narmunthi == Augustamnica I and II ==