The Jastorf culture is an Iron Age material culture in what is now north Germany, spanning the 6th to 1st centuries BC, forming the southern part of the Pre-Roman Iron Age. The culture evolved out of the Nordic Bronze Age, through influence from the Halstatt culture farther south. The cultures of the Pre-Roman Iron Age are sometimes hypothesized to be the origin of the Germanic languages. Herwig Wolfram locates the initial stages of Grimm's Law here.[citation needed]
Periodization (middle European culture counterpart):