| Notes |
Provincial administration reformed by Diocletian, ca. 293. Praetorian Prefectures established by Constantine I in 318. Empire permanently partitioned in 395. Exarchates of Ravenna and Africa established after 584. Provinces replaced by Theme system, ca. 680.
* affected (boundaries modified/abolished/renamed) by Justinian's administrative reorganization in 534-536
† re-established after reconquest by the Eastern Empire in 534, as the separate praetorian prefecture of Africa |