Regianum
Ῥηγίανον
Regianum (Ῥηγίανον, Ptol. 3.10.10), a place on the Danube in Moesia Inferior. It is probably the same place as the Augusta of the Itinerary (p. 220; comp. Tab. Peut.) and the Αὐγοῦστον of Procopius (de Aed. 4.6); in which case it may be identified with Cotoszlin at the confluence of the Ogristul and Danube.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.