Kütahya Castle is a historic fortress located in the city of Kütahya, Turkey. It is believed to have been built during the Byzantine period, with later modifications made by the Seljuks and Ottomans. The castle sits on a hill, offering panoramic views of the surrounding area and the city below. The structure features thick stone walls and several towers, which were designed for defense. Over the years, Kütahya Castle has served various purposes, including military and administrative functions. Today, it is a popular tourist attraction, showcasing the rich history and architectural heritage of the region.