During the Venetian rule this was the strongest castle in Naxos. There used to be older fortifications, but what is seen today was built by the Venetians around the 13th-14th century to control the inland. They called it Apano Kastro to distinguish it from Kato Kastro, i.e. the castle of Chora. It had two lines of forts and its ruins include remains of houses, cisterns, temples etc. It stands on top of a hill between Potamia and Tragaia.
Naxos Apano Kastro
