This Ancient Celtic Helmet Is the Oldest Ever Found in Poland

Archaeologists in Poland have unearthed a horde of 300 artifacts dating back to the fourth century B.C.E. Found at the Łysa Góra site in the region of Mazovia, near Warsaw, the trove includes iron axes, scissors and, most notably, a rare Celtic helmet.

A team from Warsaw’s State Archaeological Museum and University of Warsaw’s Department of Archaeology has been excavating in Łysa Góra since the spring. According to a statement by the team, the helmet was buried in a charcoal pit, along with four iron axes.

Though it was damaged by age, researchers determined the “spectacular” helmet was originally shaped like a cone, possessing a separate curved neck piece and decorated with etched lines. Its discovery has changed the team’s perceptions of the Celts—a group of Central European tribes who thrived during the Iron Age, from 1200 B.C.E. until 50 C.E.

The helmet is the first artifact of its kind to be found in Poland, as excavation leader Bartłomiej Kaczyński, of the archaeological museum, tells Science in Poland’s Ewelina Krajczyńska-Wujec. Before, only one other, much newer Celtic helmet had been discovered: a first-century piece found in the southern village of Siemiechów. The Łysa Góra helmet is at least 2,300 years old.

“At first we thought it might be some kind of ancient vessel, because bronze vessels are much more common on Polish soil than helmets,” Kaczyński tells Science in Poland, per Newsweek’s Aristos Georgiou. Then, the artifact’s neck piece—an arched plate near its edge—prompted archaeologist Andrzej Maciałowicz to suggest it could be a helmet.

Based on the artifact’s shape, and the fact that its tip was held together by a double knob, researchers concluded the piece is an early La Tène helmet. The Celtic culture of La Tène—French for “the shallows”—is named for Lake Neuchâtel in Switzerland, where researchers first found La Tène objects in the late-1800s, per ARTnews’ George Nelson. The culture formed around the fifth century B.C.E., about when Celts came into contact with Etruscan and Greek people from south of the Swiss Alps.

The La Tène style of metalworking developed between the fourth and third centuries B.C.E., and examples of it are “very rare,” per Science in Poland. While 1970s and ‘80s excavations at Łysa Góra revealed some small La Tène artifacts, researchers assumed they ended up in Poland via trading.

The recently discovered helmet, on the other hand, is an example of “the most advanced Celtic metallurgy,” Kaczyński says, and the piece was seemingly owned by a Celt, per Newsweek. The La Tène helmet’s presence in northern Poland changes researchers’ perceptions of the reach of the Celtic world in the pre-Roman period.

The other artifacts the research team found illustrate the ancient Celts’ proclivity for animal husbandry and farming: Blades from shears might have been used to cut sheeps’ wool, and scythes might have cut grain or grass. According to a statement by the archaeological museum, the researchers also found a collection of glass, amber and stone artifacts, including jewelry—bracelets, ornate necklaces and rings.

The helmet was taken to the State Archaeological Museum’s conservation department, where an expert in iron and bronze artifacts will spend several months conserving its pieces. As Kaczyński tells Science in Poland, the research team began excavating Łysa Góra to help construct an educational trail through the site. But the team’s “multitude of discoveries” indicates they may have more archaeological work to do than they thought.

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Sonja Anderson is a writer and reporter based in New York City.