Göbekli Tepe (Turkish: [gœbecˈli teˈpe], "Potbelly Hill"; known as Girê Mirazan or Xirabreşkê in Kurdish) is a Neolithic archaeological site near the city of Şanlıurfa in Southeastern Anatolia, Turkey. It includes two phases of use, believed to be of a social or ritual nature by site discoverer and excavator Klaus Schmidt. Its oldest layer dates to around 9000 BCE, the end of the Pre-Pottery Neolithic A (PPNA). The younger phase, radiocarbon dated to between 8300 and 7400 BCE, belongs to the Pre-Pottery Neolithic B. During the early phase, circles of massive T-shaped stone pillars were erected, classified as the world's oldest known megaliths, contemporary with other nearby settlements such as Nevalı Çori and Çayönü. In 2018, the site was designated a UNESCO World Heritage Site.