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- Hillfort on the east bank of the river Ampsaga (modern Rhumel); oldest remains date back to the Neolithic
- In Numidian times, there were many hillforts in the area of what is now Cirta (modern Constantine); today, Tiddis (just under thirty kilometers northwest of Constantine) is the most accessible of these (hence: castellum). From this age are a Punic wall; a bazina; finds from the sixth century BCE
- Castellum Tiditanorum becomes a Roman town in the age of the emperor Augustus
- Forum with arch, bathhouses, aqueduct reservoir, sanctuaries (o/a Cereres, Vesta, Mithras)
- Most famous in habitant: Quintus Lollius Urbicus, one of the Roman commanders in the war against Bar Kochba (132-136), governor of Britain, and perhaps the praefectus urbi who died in 160
- Bishopric: chapel with tombs (martyrium?), two baptisteries
- c.430-533/534: Vandal domination of the region
- 533/534: Byzantine rule; fortifications.
- Seventh century: Arab conquest.