Kayseri Castle, 3rd century Roman castle in Kayseri, Turkey.
Kayseri Castle is a Roman fortress in Kayseri Province featuring an inner stronghold and outer defensive walls. Eighteen towers are positioned along the perimeter to protect the entire complex.
The fortress began as a Roman structure and was expanded many times under Byzantine, Danishmend, Seljuq, and Ottoman rule. Each period of control left its mark on the walls and layout.
The mosque built in the 15th century inside reflects how different beliefs shaped this structure over time. Walking through, you notice how Islamic and earlier architectural styles blend in the same spaces.
The site operates as an Archaeological Museum with exhibitions and events open throughout the year. Plan to spend several hours exploring the structures and artifacts at a comfortable pace.
The site appears on a coin from Emperor Gordian III in the 3rd century, making it one of the rare examples documented through ancient coins. This numismatic evidence provides one of the earliest records of the location.
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