Eskihisar Castle is a historical castle located 6 km northeast of Gebze on the coast of Izmit Bay, built during the Byzantine period to protect the port and also used during the Ottoman period. It stands out with its fifteen-domed cistern supported by eight columns and a theater stage.
Eskihisar Castle is located approximately 6 km northeast of Gebze district, Kocaeli province, on a steep point northeast of Eskihisar Village. Thought to have been built during the Byzantine period to control the passage south of Izmit Bay and protect the port, the castle was actively used and expanded during the Ottoman period. Thanks to its massive watchtowers and walls that have survived to this day, it creates a silhouette dominating the bay.
One of the most striking elements of the castle is the fifteen-domed cistern resting on eight columns; this structure showcases the engineering understanding of its era. A theater stage is also located within the castle. The structure, which underwent extensive restoration in 1998, appeals to both history enthusiasts and photography lovers with its Izmit Bay view.
Related discoveries: Historical Sites, Kocaeli historical sites, Bayramoğlu Island (Peninsula).
Guide's Note
Eskihisar Castle, with its recently completed restoration works, has gained a more organized appearance with its surrounding square and green areas. Visitors state that the spacious square area is suitable for a calm walk and that they positively perceive the historical texture that the historical building conveys even from the outside. The sea view and large open area offer a sufficient atmosphere for a few hours' visit.
New cafes and restaurants are starting to open in the vicinity; this situation may increase the use of the area in the future. It is also reported that no serious problems were encountered regarding transportation and parking. However, significant differences in visitor experiences are observed.
- Castle entry: More than one visitor shares that they could not enter the castle. It is recommended to check if it is open before visiting.
- Restoration process: The area is not yet fully completed; construction work may still be ongoing in some sections.
- General impression difference: There is a large discrepancy in evaluations among comments; the experience offered by the venue varies significantly from person to person.
Best Time to Visit
The most suitable period to visit Eskihisar Castle is during the months of April-May and September-October. During these months, the weather is neither scorching hot nor rainy; you can comfortably stroll among the walls. Although the wind blowing from the bay in mid-summer softens the heat a little, the stone ground and walls get quite hot at noon. While visiting in winter is possible, the indoor sections are more likely to be closed.
For photography, the early morning hours or close to evening are more productive; the light over the bay takes on a much softer and more dramatic appearance at these times.
How to Get There?
The castle is approximately 6 km from Gebze city center. You can reach it directly by private car by turning off the D100 highway towards Eskihisar; parking is available near the castle. Those who wish to come by public transport can use the minibuses departing from Gebze towards Eskihisar. From Gebze train station, it is a 15-20 minute journey by minibus or taxi. For those coming from Istanbul, reaching Gebze by Marmaray or suburban train is a practical option.
What to Eat Nearby?
Dining options are quite limited in the immediate vicinity of the castle. There are a few small cafes and fish restaurants along the Eskihisar coastline nearby. These restaurants can be a good stop for those who want to eat fresh fish accompanied by a bay view. If you are looking for a wider selection, it is recommended to return to Gebze city center; there are many restaurants and cafes suitable for every budget here.
Photo Spots
Eskihisar Castle offers an interesting contrast for those who want to capture Izmit Bay and the industrial facilities on the opposite shore in the same frame. The view from the walls towards the bay provides the best frame. The castle's towers are also suitable spots for both close-up and wide-angle photography. The dome details of the cistern inside are another point of interest for architectural photography lovers. In the early morning hours, fog may hang over the bay; this opens the way for dramatic shots.
Things to Pay Attention To
The interior sections of the castle are sometimes kept closed; some visitors have stated that they could see inside from the door but were not allowed to enter. Before you go, contacting the Kocaeli Provincial Directorate of Culture and Tourism to learn the current situation will prevent wasted time. There are also feedbacks that maintenance of the surroundings is sometimes neglected; it is recommended to go with appropriate clothing. The roads around the castle are stony and inclined, be careful of slippery surfaces.
How Much Time Should Be Allocated?
Eskihisar Castle easily fits into a half-day travel program on its own. 1 to 1.5 hours is sufficient to visit the walls, cistern, and theater stage. If you combine the castle with other historical sites in Gebze or the Eskihisar coastline, you can create a full-day itinerary. It can also be planned as a day trip from Istanbul; transportation is quite practical thanks to the Marmaray connection.
Historical Background
Although the exact date of construction of Eskihisar Castle is unknown, it is believed to belong to the Byzantine period. The main purpose of the castle was to control the passage south of Izmit Bay and protect the port. The structure, which was actively used and expanded over time during the Ottoman period, reflects the water engineering understanding of its era with its fifteen-domed cistern resting on eight columns. The castle was renovated in accordance with its original form in 1998 with extensive restoration work.
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