Notitia Dignitatum (Register of Dignitaries). c AD 400:

Seeck, Otto, ed. Notitia Dignitatum: Accedunt Notitia Urbis Constantinopolitanae et Laterculi Prouinciarum.
Berolini (Frankfurt am Main): Apud Weidmannos (Unveränderter Nachdruck), 1876.
https://ia800905.us.archive.org/17/items/notitiadignitat00seecgoog/notitiadignitat00seecgoog.pdf