An amateur archaeologist found in 2015 near Jerzwałd (Poland) and donated to the museum an antique sword, probably from the 4th century CE. According to archaeologists, it may be a spatha sword from the late Roman period, unique in the lands of the former Balts.
During archaeological research, ever conducted between the lower Vistula and the Nemunas, only a few copies of such weapons were found – e.g. in the barrow cemetery near Suwałki and in the grave of a warrior on the Sambia peninsula. The sword from Jerzwałd is another valuable find in this area.