Bibracte, a Gallic oppidum or fortified settlement, was the capital of the Aedui and one of the most important hillforts in Gaul. It was situated near modern Autun in Burgundy, France. The material culture of the Aedui corresponded to the Late Iron Age La Tène culture.
In 58 BC, at the Battle of Bibracte, Julius Caesar's armies defeated the Helvetii 16 miles south of the fort. In 52 BC, Vercingetorix was proclaimed head of the Gaulish coalition at Bibracte. A few decades after the Roman conquest of Gaul, Bibracte was abandoned in favour of Autun, 25 kilometres away. Once abandoned, Bibracte remained undisturbed and unexamined until discovered by modern archaeology.
Wikipedia https://en.wikipedia.org/wiki/Bibracte
Address 71990, France
Coordinates 46°55'27.103" N 4°2'14.685" E