Iron was discovered as the latest from all metals used in the ancient history. It was caused by technological difficulties connected with the processing of iron. There were problems with high temperature of melting. About 800-700 B.C. this metal was popularized on today's Pomerania terrains. Iron was gained mainly from so called morass ore. Just after the achievements in the beginning of the Iron Age, the unexpected fall of the Lusatian culture on terrains of Middle Pomerania came. Cooling of climate and expansion of the new cultural trend - the Pomeranian Culture are the major reasons of this phenomenon.

In the Iron Age we differentiate two sub-periods of the Cashubian Group of the Lusatian culture. The older 650-500 B.C., and younger 500-400 B.C. That group, after 500 B.C. transformed into the different culture, called since then ‘the Pomeranian culture’. It composed further evolutional branch of the proto-Slavic culture. Archeological discoveries of Pomeranian are numerously represented in Slupsk. These are mainly single graves, cemeteries, cinerary urns, products from bronze, iron and the ceramic art appearing on cemeteries and in villages.

The Pomeranian culture shows intense integrity links and influences of the Lusatian culture. As contrasted with the Lusatian culture, however, specializing in the metallurgy (casting of metals and black-smithing), it shows weaker skills in the sphere of ceramics. The main difference between both cultures, however, is the funeral rite and deadly ceramics. Despite the obligatory cremation rites, a dominant form of the grave becomes so called stone case containing most often up to several burials. The construction of such a grave consisted of flatly cut stone plates, arranged in rectangular shape, seldom polygonal.

Stone case tombs are typical for Globular Amphora Culture. These graves were of small sizes and contained from one to several cinerary urns. Later, their measurements increased and the quantity of cinerary urns in one grave came up to twenty and more. Graves were provided with bronze and iron products, mainly decorations and tools. A dominant form of the grave ceramics became facial urns.

These were special dishes, closed from above with so called cap covers. With the neck of this dish people tried to shape the face of the deceased. At the bottom of this dish, people often put drawings representing scenes from the deceased’s life. The picture presents facial urns from Sciegnica (commune Kobylnica), coming from the early Iron Age. In most graves, however, cinerary urns appeared without decorations. In the economy of Pomeranian tribe culture the most important thing was the domestic animal husbandry, shepherding and agriculture. Pomeranian people established small settlements with ground houses of the column construction.