Gaziantep Castle was originally built by the Hittite kingdoms on a hill that stands high on the surrounding land. As the population and the city grew the castle became the centre of the city, standing tall above the buildings.
While the Hittites build a small observation point it was later expanded into a full castle by the Roman Empire during the 2nd and 3rd century AD, it remained this way for generations. During the reign of Emperor Justinianus, it was further expanded to the final size that is known today. As recently as 2000 the castle has been renovated throughout the generations. Now the castle stands as a museum to commemorate Heroism and the defence of Gaziantep against French Troops that attempted to invade after the fall of the Ottoman Empire.