Archaeology
In the region identified by Ptolemy and Pliny, east of the Vistula and adjoining the Baltic, there was an Iron Age culture, known to archaeologists as the West Baltic Cairns Culture or West Baltic Barrow Culture, shown coloured violet on the map given here. The culture is associated with the Proto-Balts, who kept this area for almost two thousand years, avoiding adoption of new ideas from their neighbours. These herders lived in small settlements or in little lake dwellings built on artificial islands made of several layers of wooden logs attached by stakes. Their metals were imported, and their dead were cremated and put in urns covered by small mounds.
In the Post-War era Polish archaeologists generally interpreted the Veneti as the possible bearers of the Pomeranian culture, an Iron Age archaeological culture in Poland to the west of the Vistula, despite the clear location of the Veneti in Roman sources to the east of the Vistula. This identification can still be found in the work of Polish authors of the 1980s and 1990s, although more recent Polish authors tend to reject it.
Read more about this topic: Vistula Veneti