HistoryNeolithic (c. 9600-8000 BCE)Southeastern Turkey (Upper Mesopotamia)low confidence

Göbekli Tepe in southeastern Turkey contains T-shaped limestone megaliths, some exceeding 16 feet (5 metres) in height and weighing up to 50 tons.

Notes on verification

Height and weight figures corroborated by UNESCO, DAI (excavating institution), and Smithsonian Magazine reporting on excavation director Klaus Schmidt's findings.

Sources