The Hill of Kastro (Castle) is definitely one of the places worth visiting during your walk in Parikia. Since 4000 BC right through today it constitutes the core of Paros community.
At the Hill of Kastro you will see some ruins of the Venetian castle, built by Marco Sanudo, the Venetian duke of Naxos, in the 13th cent. to protect the city from pirates and conquerors.
This castle was built on the remains of ancient temples, three of archaic and two of classic style, while today only the part of its eastern and southern side, 4-6 meters high, survives. From the 5 chapels in total upon which Frangocastello was founded, only the ruins of a small part of the archaic style temple of Goddess Athena (6th cent. BC) are preserved at the top of the hill of Agios Konstantinos.
During your walk at the castle you will notice some small chapels, most of which are built into the castle walls, such as Agios Markos, Agios Stylianos, Panagia tou Stavrou (Madonna of the Cross) (1514) and the church of Agios Konstantinos with its unique architecture and stunning view of the sea.