Training

Polykastro (Greek: Πολύκαστρο, before 1928 Καρασούλι, Karasoúli; Bulgarian and Macedonian: Ругуновец, Rugunovec) is a town and a former municipality in Kilkis regional unit of Central Macedonia, Greece. Since the 2011 local government reform it is part of the municipality Paionia, of which it is a municipal unit, and the seat.

Paionia (Greek: Παιονία, pronounced [peoˈnia]) is a municipality in the Kilkis regional unit of Central Macedonia, Greece. The seat of the municipality is the town Polykastro. The municipality is named after the ancient region of Paeonia. It has an area of 919.276 km2.