Perperikon, ancient Bulgarian language (Перперикон, Greek: Περπερικον) is an ancient Thracian city built on rocky hills at 470 m high in eastern Rhodopes, 15 km north of the city of Kardzhali 
According to archaeological investigations, the first life traces in Perperikon 6 000 years ago, call the Copper Stone. Later, during the Late Bronze Age and the Early Iron Age, the city became a magnificent center of worship. 
In August 2000, a Thracian king palace was found around Perperikon, under the direction of archaeologist Nikolay Ovcharov, filled with temples under the old castle. It is the only palace of the Thracian king that belongs to that turn until this day.