On the road with Siemirowice to Oskowa tumulus cemetery lies before 3 thousand. years, used by the population of the so-called Lusatian culture. Kashubian group. Mounds were looted in the Middle Ages, but for science "discovered" them again and tested in the 60th l. Nominally the twentieth century is their 70, but the layman's eye sees 10-12 barely been strongly flattened mounds.

The cemetery is located in Siemirowice in the woods near the road leading from Siemirowice to Oskowa, occupying the area in 1500 to 500 m. Most of the twelve graves have been disturbed in ancient times.

Based on anthropological studies found that the average life buried in the cemetery was 25 - 35 years for women and 35 - 45 years for men. It was also a large number of burials of children. For many urns made skeletal remains of several people, mostly mothers with children.

Mounds were mostly in the shape of a circular horizontal projection or close to it, with a diameter of 5 to 10 m. The largest mound has a diameter of 18 m. The maximum height of mounds reached 1.5 m. The circular shape was achieved by arranging mounds at the base of the spine with large , closely adjacent stones. Constituted the basis for most single coils. In the middle of their chests were constructed of flat stones cleft. Above the boxes, within the circle of Piles left behind a coat of field stones. Inside the crates and have pottery urns which serve as appetizers, and burned human bones. Often accompanied by metal products, mostly jewelry and everyday objects of the deceased. The bottom of the boxes were lined with flat stones.

When creating the cemetery was used massive amounts of building materials. Taking the average of the object with a diameter of 8 m and a height of 1 m, it was necessary to gather 1,500 cubic meters of lumber.