were alternated between tillage and grazing. Several or more settlements made up a micro-region, within which the residents cooperated economically and buried their dead in a common cemetery, but which was separated from other micro-regions by undeveloped areas. A number of such micro-regions possibly made up a tribe, with these separated by empty space. The tribes in turn, especially if they were culturally closely related, would at times form larger structures, such as temporary alliances for waging wars, or even early statehood forms. A Przeworsk culture turn of the millennium industrial complex for the extraction of salt from salt springs was discovered in Chabsk near Mogilno. Examinations of the burial grounds, of which even the largest used continuously over periods of up to several centuries, contains no more than several hundreds graves, shows that the overall population density was low. The dead were cremated and the ashes sometimes placed in urns, which had the mid-part in the form of an engraved bulge. In the 1st century AD this was replaced with a sharp-profiled (with a horizontal ridge around the circumference) shape. In Siemiechów a grave of a warrior who must have taken part in the Ariovistus expedition during the 70–50 BC period was found; it contains Celtic weapons and an Alpine region manufactured helmet used as an urn, together with local ceramics. The burial gifts were often, for unknown reasons, bent or broken, and then burned with the body. The burials range from "poor" to "rich", the latter ones supplied with fancy Celtic and then Roman imports, reflecting a considerably by this time developed social stratification. The main feature of the Przeworsk culture are burials. These were mostly cremations, with occasional inhumation. Warrior burials are notable, which often include horse-gear and spurs. Some burials are exceptionally rich, overshadowing the graves of Germanic groups further west, especially after 400 AD. Pottery and metalwork are often rich and show a great variety Peoples The Przeworsk culture was probably not exclusively connected with a single ancient ethnic or linguistic group. In classical ethnography, the culture was linked to a group of peoples known as the Lugii. Among specific Germanic peoples, the Przeworsk culture is often associated with the Vandals, although they were probably only one ethnic element within the culture. Also, the Przeworsk culture has been linked to the early Slavs, and "based on the newest anthropological data it has been suggested that