Menosgada ("town above the Main valley") was a Celtic metropolis on the Upper Main (river) that was mentioned by the Greek geographer, Ptolemy. It was probably located on the hill known today as the Staffelberg.In the 1st millennium BC, Celts settled on the Staffelberg. Around 200 BC, the simple Early Celtic fortification was expanded into an oppidum, covering an area of 49 hectares, that was protected by a 2,800-metre-long defensive wall and ditch against the inhabitants of the neighbouring Jura lands.