It is one of the important cities of the Pisidia region. Its connection (Eurymedon) with the cities of Pamphylia was carried out through the Kopruchay valley. His trade was with the port of Aspendos at the mouth of this river, and relations were strengthened by the monetary alliance that was established with Aspendos. In this regard, the city was included within the state of Pamphylia in 25 AD. the city is mentioned by Calchas in the Hellenic epics. The fact that this is an original Anatolian city can be understood from the name Estlegiis, read on the coins.

Before the Persian invasion in 547 B.C. this region was part of the Lydian kingdom. It was under the rule of the Persians, until in 334 BC. Alexander the Great did not come; The inhabitants of the city remained independent due to the fact that they did not create difficulties for Alexander the Great, submitted to him during the campaigns of conquest and remained independent and independent during the Hellenistic period (330 BC – 30 AD). The very heyday of the well-being and prosperity of the city was in the Roman period, according to Strabo, the population was up to 20 thousand people. This continued until the Byzantine period, when people adopted Christianity. Having fallen under the influence of the Turks in the 13th century AD, the inhabitants turned into a nomadic settlement, the city was renamed Zerk. Today, the city mainly consists of the city walls and the acropolis. The ruins of the gymnasium, the stoa, the stadium and the basilica are poorly preserved to this day. However, the main lines of the two temples remained. The strongest building that has survived to this day is the theater, which was restored in the 3rd century AD. There are many ancient buildings on the Köprüchay River and on the road following it. (Oluk Bridge, Byogum Bridge, Ancient Road, Garrison Buildings, Waterway, Chapel, etc.)