The cremation cemetery of the Wielbark Culture located in Wielka Kletna Range in Białowieża National Park (Podlasie Province in eastern Poland) was discovered in 2003. During the archaeological excavations conducted in the strict reserve of Białowieża National Park, exploration methods minimising the disturbance to the natural environment were employed. Two trenches (23 m2 in total) were opened. Part of the cemetery was covered with a stone paving. Four graves, with no urns, containing bone fragments of four children and an adult man, were discovered. Burials were equipped with scarce ornaments (copper and bronze fibulae, glass beads), tools (spindle whorl), or elements of clothing (iron belt buckle), and – in one case – a set of five clay vessels. Moreover, in the surroundings of graves, over 200 potsherds (80% of them partly burnt), fragments of glass vessels and beads, and a few other artefacts (eg, a small copper knife) were also found. Both the artefacts found at the site and the radiocarbon dates of two charcoal samples from the graves pointed to the C1b–D phases of the Late Roman Period (ie, 3rd–5th c. AD).