The old capital of the island during the 6th-19th centuries is located in its eastern part and goes by the name Kastro. One of the most picturesque and beautiful villages of Sifnos, it is the most important one from an archaeological point of view.
Kastro has been inhabited incessantly over time since the 3rd millennium BC, while Herodotus refers to it as the city that flourished during the 6th century BC featuring a temple, a theatre of Dionysus and luxurious public buildings made of marble. The village owes its name to the "castle" formed by its buildings, its shape is ellipsoid following the terrain morphology and it stands out for its defensive character.
Witnesses of its long history are the ruins of the ancient acropolis on the hilltop, the ancient columns built into newer buildings, the Roman sarcophagi, the loggias (6 gates-galleries in total from which you can enter Kastro) and the churches dating back to the 16th and 17th centuries.
In the centre of village there is the Archaeological Museum of Sifnos with exhibits from prehistoric to Roman times, while at its highest point there is the building that once housed the Catholic cathedral.
In Kastro you will find some rooms to let as well as taverns, cafes and bars.