Originally Adeva (Adeβa) on whose ruins was built Pernik, was a fortress of the Thracian tribe of Agrianes, and later a Roman settlement. .
Sources:
- Thucydides, The Peloponnesian War 2.96, Volume 1. Thucydides. Benjamin Jowett. translator. Oxford. Clarendon Press. 1881.
- https://placeandsee.com/wiki/pernik