Göbekli Tepe is regarded as an archaeological discovery of the greatest importance since it could profoundly change the understanding of a crucial stage in the development of human society. Ian Hodder of Stanford University said, "Göbekli Tepe changes everything". And David Lewis-Williams, professor of archaeology at Witwatersrand University in Johannesburg, has said, "Göbekli Tepe is the most important archaeological site in the world. It is located at the top of a mountain ridge in the Southeastern Anatolia Region of Turkey, northeast of the town of Şanlıurfa (formerly Urfa / Edessa). It includes massive stones carved about 11,000 years ago by people who had not yet developed metal tools or even pottery.