What is "heuneburg"

The Heuneburg is a prehistoric hillfort by the river Danube in Hundersingen near Herbertingen, between Ulm and Sigmaringen, Baden-Württemberg, in the south of Germany, close to the modern borders with Switzerland and Austria. It is considered to be one of the most important early Celtic centres in Central Europe. Apart from the fortified citadel, there are extensive remains of settlements and burial areas spanning several centuries.

The fortified citadel measures about 300 by 150 m. It stood on a strategically positioned mountain spur that rises steeply 40m above the Danube. It is at the centre of a fertile river plain, surrounded by rolling hill country.