The Castle of Kimolos is situated in Chorio.

This Castle was the initial fortified settlement, around which today's Chorio developed. It was constructed in the venetian era, so as to protect the island's residents from the frequent and destructive pirate raids.

The Kimolos Castle consists of two concentric housing complexes, with one (called "Mesa Kastro" = "Inner Castle") being within the other ( Ekso kastro = "Outer Castle"). The houses had two floors and they were closely built, with their external walls being also defensive walls for the whole village. The inner castle (Mesa Kastro) is deserted, while the outer castle (Eksw Kastro) still has many houses and two gates. Actually, the Folklore Museum of Kimolos is right next to one of them. Extra tip: If you want to guess how old a house in Chorio is, you just have to take a look at how close to the center of the Castle this is. Usually, the closer to the Castle, the older the house. As you wander around Chorio, it is inevitable not catch a glimpse of the Castle, since Chorio is really the Castle.