Cales was an ancient city of Campania, in today's comune of Calvi Risorta in southern Italy, belonging originally to the Aurunci/Ausoni, on the Via Latina.
Under Roman rule from the 1st century CE, Histria was incorporated into the province of Moesia. The city is noted on the Tabula Peutingeriana, which places it 11 miles from Tomis and 9 miles from Ad Stoma.
The Roman settlement overlooked a passage between the Hodna and the Sahara via the Aïn Rich plain and the valley of the Oued Chaïr, between the Ouled-Naïl and Zab mountains.