After the Roman withdrawal from Dacia in 275 AD archaeological evidence suggests that life continued as usual with the same coinage, etc.  Between 306-337 the Romans returned during the leadership of Constantine the Great.

In 337 AD the Huns, a nomadic tribe originating in Turkey, invaded and remained until the death of Atilla in 453 AD. 

The Byzantine Emperor Justinian the Great (527-565 AD) followed as the new leader on both sides of the Danube. 

The Avars, a nomadic and equestrian tribe, entered the region under the leadership of Bayan (558-605 AD) followed by an alliance of the Slavs, Bulgars and Kutrigurs, descendants of the Huns, in 559AD.  The alliance posed such a threat to the Byzantine Empire that they provoked a successful campaign by the Romans against the Slavs and Avars in 593 AD. 

Within a few short years large numbers of Slavs move in from the north and overrun the Byzantine defensive lines.

The 11th Century AD is troubled. The Hongars invade the entire region from the East.  They transform Tibiscum into a Middle Age city that was renamed Caransebes in 1290 AD. 

In 1432 AD Dracul, father of Vlad Tepes (Dracula), razes Caransebes together with the Turk army.