Denizli is a province of Turkey in Western Anatolia. Neighbouring provinces are Uşak in the North, Burdur, Isparta, Afyon in the East, Aydın, Manisa in the West and Mugla in the South.
The area has been occupied since prehistoric times, there were important ancient Greek and Roman towns nearby, (Hierapolis and Laodicea on the Lycus), which persisted through the Byzantine period.
The city was founded in its current location after the area had been settled by the Turks. In the 17th century, the Turkish traveler Evliya Celebi visited Denizli and recorded the town as follows: "The city is called (Denizli) (which means seaside in Turkish) as there are several rivers and lakes around it. In fact it is a four day trip from the sea. Its fortress is of square shape built on flat ground. It has no ditches. Its periphery is 470 steps long. It has four gates. These are: painters gate in the North, saddle-makers gate in the East, new Mosque gate in the South, and vineyard gate in the West. There are some fifty armed watchmen in the fortress, and they attend the shop. ''
The city lived in peace for centuries without being involved in wars in a direct manner. Following the World War I, during the Independent War the Greek forces managed to come as close as Saraykoy, a small town 20 km northwest of Denizli, but did not venture into Denizli where resistance was being prepared.