The haul of weapons dating back to WWII was found in woods near the border with Germany by members of the Perkun Exploration Association after the man on the bike told them his grandfather had buried them nearby.
The coins date from between 1657 and 1667, pointing to their minting shortly after the Deluge, a series of wars with Sweden throughout the 17th century which wreaked havoc and destruction throughout the Polish-Lithuanian Commonwealth.
Dr. Dawid Kobialka, from the Institute of Archaeology and Ethnology of the Polish Academy of Sciences said the grim discovery related to a massacre by Gestapo officers in the second half of January 1945.
Archaeologists have dated the discovery in Bydgoszcz from the 10th to the 12th centuries. If the earlier date is correct, the remains could be those of some of the first children to ever have been called Polish since the state of Poland was established under Duke Mieszko I, whose reign began sometime before 963 and continued until his death in 992.
The remains of the prehistoric settlement, which belonged to the Lusatian culture, were found deep below the ground in what is today’s Białołęka district of the city.
The graves contain bodies of soldiers killed in battles between the Austro-Hungarian and Russian empires.
According to archaeologists at the site in Biskupice, Małopolska, the unusual artefact which measures 10cm across and has clearly defined eyes and a nose with two protrusions that resemble horns could be “connected to religious practices."
According to Dr. Szymon Dreja, director of the Museum of the Battle of Grunwald, the discovery of the battle axes at the site of the battle in northern Poland are an archaeological sensation, and there is little doubt that the axes come from what many historians say was the largest battle of the middle ages in Europe.
Some 150 Jewish gravestones have been unearthed during construction work in the south-eastern Polish town of Leżajsk.
The incredible discovery was made by archaeologists scouring Lake Lednia where along with the sword they found 21 artefacts including two axes, 13th and 14th century arrowheads, crossbow bolts and a sickle.