At the top of the hill there is an impressive monument which was built during the long Venetian rule (1204-1537). It is the natural acropolis of Hora where in the Venetian years must have been fortresses where had been built from Marcus Sanoudos at 1207. He created the Castle area which was consisted of 7 towers, but our days there is only one.
The other towers sold out from rich famous families and became houses.
The main Castle had 3 doors: at the beginning of the tower, the Entrance, which is still there, the exit door and the last one at the east side.
During invasion from pirates first of all closed the doors of simple settlements and then in case of an emergency surrounding in the Castle. The last defence was the main tower of Castle.
The location of Castle is still keep many of the characteristics from that epoch. Houses with large entrance room, some of them keep the type of palace duke like the houses of Dellaroca Grek etc. Labyrinth small roads is still keep painting every year from those who have stay.

The most interesting worth seeing sights in the Castle area are:
The Venetian Castle
The Catholic Metropolitan Temple
The Catholic Temple of Saint Antonio (Kappukinon)
The Catholic Temple of Virgin Mary Santa Kapella Kazatza
The Archaeological Museum
The Catholic Monastery of Ursulin (greek-french High School female)
The Catholic Temple of virgin Mary Lourdes
The Christian Church of Virgin Mary Theoskepasti
The Central Aqueduct

A medieval town in the heart of the Aegean is still keep its original form and inhabited continuously since 1207.