Medieval Sword Found in Vistula River After 700 Years

“It Was Supposed to Be a Fish—But Became History”

On a parched summer’s morning in early July 2025, the Vistula River near Warsaw lounged unusually low. Amateur angler—and impromptu archaeologist—Andrzej Korpikiewicz wasn’t there to fish. Instead, he was thirsty for a stroll and something different to catch his eye.

That something became a 700-year-old medieval sword, its corroded tip glinting among river pebbles. Emerging unexpectedly from centuries of silence, the blade measured roughly 31 inches (79 cm), complete with a spherical pommel and a mysterious cross engraved on its grip—a mark modern experts suspect might be the blacksmith’s signature. 

Realising this was more than rusty junk, Korpikiewicz executed a small act of preservation poetry: finding the sword too unwieldy for his e-scooter, he hid it in the grass, then soaked it overnight in Vistula water-soaked t-shirts in his car, following advice from a metal-detecting friend. 

The next morning, he delivered it to Warsaw’s Conservator of Monuments—a legal and culturally savvy move that set a chain of careful conservation into motion.

“A Sensational Find” and Meticulous Resuscitation

Experts lauded the sword as “sensational,” especially notable for its completeness despite water damage. It has entered the Metal Conservation Workshop at the State Archaeological Museum, where a regimen of radiation imaging, a six-week chemical bath to remove chloride, pH-balancing rinses, and mechanical cleaning is underway. Afterwards, it will receive a protective coating before archaeologists study it further. 

Anna Magdalena Łań, a chief specialist with Warsaw’s heritage office, tentatively dates the piece to the 13th or 14th century—around the founding era of Warsaw. She noted the cross may help narrow the timeline if it aligns with known maker’s marks. 

Because the sword was found without other artefacts, scholars face challenges placing it in a broader context. Some speculation about the cross draws parallels with crusader orders like the Templars or Hospitallers—but most agree it might simply be a decorative or workshop mark, not evidence of mystical knighthood. 

Why It Resonates

This isn’t just a metal relic; it’s a medium through which the churn of history connects with today’s bank of the Vistula. It raises a small marvel: how many stories drift unseen beneath our feet—in places like the Vistula, with its shifting silt and silent currents?

And there’s context: earlier in 2025, archaeologists uncovered a medieval knight beneath an old ice-cream parlour in Gdańsk, reminding us that Polish soil (and swamplands) keeps surprising tales buried. 

Next time you visit a riverbank—or anywhere that time has hushed—consider: what could lie just beneath? In Poland, that idle curiosity once reeled in a medieval sword. What might the next odd glimmer be?