Rare Iron Age Celtic helmet discovered in northeastern Poland far from its homeland

October 31, 2026 feature Rare Iron Age Celtic helmet discovered in northeastern Poland far from its homeland Sandee Oster Author Sadie Harley Scientific Editor Robert Egan Senior Editor Around 2,400 years ago, at Łysa Góra in Poland, a group of people took a bronze helmet, crushed it, broke it into pieces and threw it into a pit with iron adzes and a scythe. Such helmets are sometimes found in lavish graves of the Celtic warrior elite, from Champagne, France, to Dürrnberg, Austria. A new study published in Antiquity reports the discovery of a rare Berru-type helmet. Its find spot in northeast Poland makes it the only known helmet of its kind found outside its Celtic homeland in the 4th century B.C. "Łysa Góra is one of the most exciting and mysterious archaeological sites dating to the Early Iron Age," said Bartłomiej Kaczyński, an archaeologist at the State Archaeological Museum in Warsaw. "The helmet is a symbol of power and direct evidence of long-distance contacts." Buried in a hill Łysa Góra was a fortified Iron Age settlement located on a sand dune between the Orzyc River and a lake. According to the study, it was inhabited between the 6th and 4th centuries B.C., possibly by people belonging to the West Baltic Barrow Culture. Archaeologists had known about Łysa Góra for decades, with excavations conducted on and off between 1971 and 1992. However, because few of the finds from those excavations were ever published, Łysa Góra's untapped potential was never fully realized, the study reports. On top of that, its reputation made excavators doubtful of finding anything useful. "We did not know what to expect, as the site had a reputation for being severely disturbed," Kaczyński said. Then excavations of a ritual pit filled with charred remains revealed something unexpected. Along with adzes and a scythe, they uncovered what appeared to be an unusual bronze vessel. "During the excavation, we uncovered an object made of bronze sheet metal, which we initially thought was a vessel," Kaczyński said. "It was only when we exposed the tip that we realized we had found a helmet of a very rare type." Similar bronze helmets are known from sites such as Dürrnberg in Austria, located far to the south. Together with around 31 mostly fragmented La Tène brooches and ring ornaments, this suggests Łysa Góra may not have simply traded with the Celts, but may have had Celtic people living there. The helmet could have been traded in, but the study suggests this is unlikely. Given the object's association with high status and warrior elites, a social concept very different from the local populace in northeastern Poland, it's far more likely the owner of that helmet once stayed at Łysa Góra. Nearly 80 La Tène artifacts have been found at the site so far. "Their diversity suggests that a group of Celts lived at the site for approximately two generations," Kaczyński said. As for why they were there, the study suggests that Łysa Góra may have been a trading post. Situated near the amber-rich Kurpie region and routes leading north toward the Sambian Peninsula, the site's location gave its occupants a strategic position to control and facilitate the movement of amber and other goods toward central Europe. "Based on ancient written sources, we cannot rule out the possibility that enslaved people were traded there as well," Kaczyński said. Ongoing excavations have revealed that Łysa Góra was a place bustling with trade and production, as revealed by nearly 350 metal objects, amber beads, an unfinished amber ring and a bronze coin possibly of Seuthes III, a Thracian king. In 2025, the team even uncovered a trepanation tool, an object used to drill holes into the skull. According to Kaczyński, it suggests that "the group living at Łysa Góra included someone—possibly a druid—with medical knowledge." "Łysa Góra is an archaeologist's dream," he said. "I hope we will discover even more exceptional artifacts there in the future." Written for you by our author Sandee Oster, edited by Sadie Harley, and fact-checked and reviewed by Robert Egan—this article is the result of careful human work. We rely on readers like you to keep independent science journalism alive. If this reporting matters to you, please consider a donation (especially monthly). You'll get an ad-free account as a thank-you. Publication details Bartłomiej Kaczyński et al., Łysa Góra in north-eastern Poland: a key Early Iron Age site on the 'Amber Route', Antiquity (2026). DOI: 10.15184/aqy.2026.10436 Journal information: Antiquity © 2026 Science X Network