Kilkis is an industrial city in Central Macedonia with a population of around 23.000 people. From the Ancient age until Μodern History Kilkis played a very important role.
Kilkis is located in a region that was multi-ethnic in the recent past and is known by several different names. The name of the city in Roman times was Callicum. In the early Byzantine times was called Kallikon, and was also known as Kalkis or Kilkis by the Greeks.