Oppidum Steinsburg

Steinsburg is the colloquial name for the remains of a Celtic oppidum on the Kleiner Gleichberg in the German state of South Thuringia. It is located within the county of Hildburghausen by Waldhaus near the small town of Römhild.

The Kleiner Gleichberg (641 m) and the neighbouring Großer Gleichberg (679 m) form a pair of "geological twins". Both mountains are basalt cones which are volcanic in origin. The name Steinsburg (867: Steinberg) ("stone castle") probably derives from the large stone fields that surround the mountain summit plateau. Johann Wolfgang Goethe recognised the volcanic origin of these stone fields: the basalt of the former volcanic pipe crumbled as a result of erosion to form the blockfields visible today that are a typical indicator of collapsed volcano structures. These basalt blocks were used in Celtic times for the construction of dry stone walls that probably protected the oppidum. A total of three rings of walls were built surround the mountain like city walls. The outermost wall is three kilometres long and encloses an area of 66 hectares. Only a few short sections of these walls have been partially preserved, but the collapsed sections enable the old structure to be made out.

In clearing large parts of the stone field for roadbuilding (from 1838), metal objects and other artefacts were discovered that were later recognised as of Celtic origin. The increasing amount of basalt quarrying from 1858 destroyed parts of the hillfort, especially the easily accessible lower wall rings and brought a huge quantity of archaeological finds to the surface, of which mainly the metal objects have survived in various collections. On the initiative of Alfred Götze, the quarrying was stopped between 1902 and 1927. In 1929 the Steinsburg Museum was built on the saddle between the Großer and Kleiner Gleichberg and this is where the majority of finds are still on display today. The Gleichberge are thought by several researchers to the same place mentioned in the Geography of Ptolemy as the settlement of Bicurgium. In the specialist and local history literature, the names Kleiner Gleichberg and Steinsburg are both used to refer to the hillfort.

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