The Castle of Neratzia is one of the most iconic historical landmarks on the island of Kos, Greece. Located at the entrance of Kos Town’s harbor, this imposing fortress dates back to the 14th and 15th centuries and was built by the Knights of St. John, a medieval Christian military order, as a strategic defense point against Ottoman invasions.
The castle consists of two main walls, an inner and an outer section. The inner castle was built first, around 1380, followed by the outer wall, which was constructed in the early 16th century. The two fortifications are connected by a drawbridge that crosses a now-dry moat. This moat once separated the castle from the rest of Kos, effectively making the fortress an island in itself.
The stones used to construct the castle were often taken from ancient ruins around Kos, including pieces from the Asklepion and other ancient sites. This gives the structure a unique appearance, blending different architectural and historical elements. You can see ancient Greek inscriptions and carved stones embedded into its walls.
During the medieval period, Kos was an important stronghold for the Knights of St. John, who controlled much of the Dodecanese islands. The Castle of Neratzia played a critical role in protecting Kos and the surrounding waters from pirate raids and Turkish advances. It was part of a network of fortifications built by the Knights across the region, including the larger fortifications on the nearby island of Rhodes.
Today, the Castle of Neratzia stands as a reminder of Kos’s turbulent medieval history and is a popular tourist attraction. Visitors can explore its massive stone walls, towers, and gates. Inside, you’ll find stunning views of the Aegean Sea and the coastline of Turkey. The castle’s elevated vantage points give visitors a panoramic view of Kos Town and the surrounding harbor.
The structure has a quiet, ancient atmosphere, making it an ideal place to wander, take photographs, and imagine the bustling life of medieval Kos. Informational displays are set up throughout the site, providing historical context for the castle’s construction and its importance in the region.
The Castle of Neratzia is conveniently located at the harbor of Kos Town, making it easily accessible on foot from most parts of the town. It is often visited as part of a walking tour of Kos Town, which includes other nearby attractions such as the Tree of Hippocrates and the Ancient Agora.
Whether you’re a history enthusiast or simply looking to enjoy stunning views and medieval architecture, the Castle of Neratzia is a must-see destination in Kos.
Tim Bull
a week agoCash only €5 per adult. Kids free. You don't get to see much of the castle. Very little to see as it's mostly closed off to the public. No information. Very little shade. (Except the entrance) Closed after 3pm.
O. A.
a month agoNerantzia Castle is an impressive historical site with strong medieval character. The massive stone walls and architecture give a real sense of history and make it an interesting place to explore. Its location near the harbor adds to the experience, offering nice views of the sea and surrounding area. It’s a great spot for photos and a short walk through history. Some parts may be under restoration or closed, which can be a bit disappointing. Still, it’s definitely worth visiting while in Kos.
Katja Mahelatova
a month agoInteresting historical place. Ticket is 5 eur pp.
Simon Floyd
a month ago5 euros to get in, toilets on site, nice walk around to see abit of history
T.H. Gartshore
2 years agoVisiting this place during my trip to Kos was a delight. It offers fantastic photo opportunities while exploring. History enthusiasts will particularly enjoy this site. A leisurely stroll takes about an hour, or an hour and a half if you stop to take pictures. On the top of the castle provides stunning views of Kos. It's advisable to bring a drink with you, as there were no facilities inside during our visit. The remnants of damage from a past earthquake are visible. Entry was free when I went. Convenient parking is available nearby, so there's little walking required. The locals are quite welcoming. I liked it so much that I visited twice.