The Oppidum Steinsburg is the remains of a major Celtic fortified settlement on the Kleiner Gleichberg in South Thuringia, Germany. Dating to approximately 2,500 years ago, it covered about 68 hectares in its largest phase and housed 2,000 to 3,000 people, making it the largest fortified hilltop settlement in central Germany north of the Main. Strategically located at the intersection of major inner-European trade routes, it is believed to be the ancient city of Bicourgion described by Ptolemy around 100 AD. Metal objects and Celtic artifacts were discovered during road construction from 1838, and the Steinsburg Museum was built in 1929 on the saddle between the twin basalt peaks.
Oppidum Steinsburg

| Type | City/town/settlement |
|---|---|
| Period | 500 BC - 1 AD |
| Country | Germany |
| Coordinates | 50.4121° N, 10.5929° E |
Germany