Corlu is located in the central part of Thrace, on a plain above the plateau. Its higher elevation compared to the surrounding area facilitates the city's defense and provides the advantage of anticipating potential threats. Furthermore, the Corlu Stream, which flows just north, supplies the city with water year-round. Possessing all the geographical features sought by early humans, this area was undoubtedly opened to settlement and agriculture with the Thracian migrations. Indeed, the discovery of prehistoric settlements in the vicinity supports this view. However, due to insufficient research, it is not possible to give definitive information about the founding date of Corlu.