Crushed Celtic helmet found at Łysa Góra in Poland, far from the Celtic heartland
Someone crushed a bronze warrior helmet and dropped it into a pit in northeastern Poland about 2,350 years ago. That helmet belongs to a Celtic type known as Berru, and the closest matches come from Austria, hundreds of kilometers to the south. A new paper in Antiquity now explains what the helmet, and the settlement around it, may tell us about how far Celtic influence reached.
A fortified hilltop on the edge of the Celtic world
The site is Łysa Góra, a fortified settlement from the Early Iron Age in Poland’s Mazovia region. Archaeologists from the State Archaeological Museum in Warsaw and the University of Warsaw have excavated it, and the helmet first made headlines in September 2024. The team, led by Bartłomiej Kaczyński, published the full study on 14 October 2026 under the title “Łysa Góra in north-eastern Poland: a key Early Iron Age site on the ‘Amber Route’.”
Berru-type helmets usually appear in the rich graves of Celtic warrior elites in regions such as France and Austria. Finding one in northeastern Poland is unusual. Smithsonian Magazine and Archaeology Magazine both describe it as the first helmet of its kind found in Poland.
What the team found in the pit
The helmet lay crushed and broken in a pit filled with charred remains. Iron tools, including adzes and a scythe, sat beside it. The pit was inside the settlement’s fortifications, and the authors read the deposit as evidence of ritual activity. The paper does not date the helmet directly. It places the Early La Tène material around the mid-fourth century BC, which works out to roughly 2,350 years ago.
The helmet closely resembles finds from Dürrnberg in Austria. The paper also reports 31 mostly fragmentary Early La Tène brooches and ring ornaments from the site, which has produced nearly 350 metal objects overall. Earlier reports mentioned about 300 artifacts in the 2024 hoard, including iron axes and scissors.
Visitors, settlers, or both?
Researchers had long assumed that small La Tène objects found here in earlier decades arrived through trade. The helmet complicates that picture. The authors suggest it may point to the physical presence of southern groups, possibly including elites, rather than only the exchange of exotic goods. They stress that this is not certain.
Some media coverage goes further and suggests a Celtic group lived at the site for about two generations. We could not confirm that figure in the paper, so treat it as a press interpretation for now.
A stop on the amber route
Amber links the site to a wider network. The team found amber beads and an unfinished amber ring, which suggest local people took part in long-distance amber exchange with regions south of the Carpathians. The settlement lies close to the amber-rich Kurpie region and to routes that lead toward the Sambian Peninsula on the Baltic coast.
The authors propose that La Tène representatives may have helped set up or maintain this network. They state plainly that the idea will need verification through further research.
A tool for cutting into skulls
In 2025 the team announced a second striking object from the same area: an iron tool with a blade that narrows to a spike, probably once fitted to a wooden handle. Live Science reported that it dates to the fourth or third century BC and was likely used for trepanation, the practice of cutting or drilling into the skull. Kaczyński said the technique and precision of the object point to Celtic metalworking, and that such operations had “not only a magical but also a medical purpose.” That suggests someone at the settlement held specialized medical or ritual knowledge, though no source we read names a druid.
Caveats and open questions
Several points remain open. Nobody has dated the helmet directly, so the age rests on style and context. The ritual reading of the pit is an interpretation, and so is the idea that Celts settled here instead of just trading. The amber-route role is a hypothesis. Further excavation and scientific analysis of the metal could sharpen all three.
For now, a crushed helmet in a Polish pit suggests that the Celtic world and the amber trade connected more closely than many researchers once assumed.