The simplified model of a metaphorical ditch or gap, a Röstigraben, between the German- and French-speaking parts of Switzerland does not automatically apply to the Bronze Age, although two cultures can be distinguished at that time as well: an area to the east influenced largely by southern Germany and the Donau region, and an area to the west largely under southern alpine influence. However, much is common to both areas and smaller core cultures are encountered within the individual groups. On the other hand, there is also the alpine world, in particular the Grisons, with a much more independent development and strong local traditions through a combination of influences from northern Italy and central Switzerland. In contrast, southern Ticino naturally identifies with the area of the Po River plain.