Przeworsk culture
The Przeworsk culture populations were for the most part also moving (to a lesser extent) south and east, which by the 4th century caused a lessening of the population density in northern and central Poland with a simultaneous settlement concentration increases in Lesser Poland and Silesia. The Przeworsk people there at this point in time are often identified with the Vandals Germanic tribe. The 4th and 5th century Przeworsk societies had to cope with a deterioration of their traditional tribal social structure, caused by the accumulation of wealth and influence in the hands of the rich, the warriors, the tribal elders and rulers, who controlled the trade, imposed contributions and plundered. During these two centuries the number of the Przeworsk culture settlements and cemeteries generally decreases. There are also clear signs of the environment being overly exploited, which provided another motivation for the population to gradually leave. Most burials were getting more poorly equipped, in comparison with the previous periods. Late Przeworsk culture ceramic materials from Greater Poland show impoverishment and lack of differentiation of form, but on the other hand metal 5th century clasps, found at a variety of locations from eastern Lesser Poland, through eastern Greater Poland to Kujawy, demonstrate the usual for mature Germanic societies highest quality of workmanship.