A 10th-century Frankish sword, marked with '+VLFBERHT+', was discovered in Poland's Vistula River, revealing ancient trade networks across Europe.
Sword discovered in Vistula River
A mechanical excavator operator retrieved a sword from the bed of the Vistula River, which had been preserved in an almost perfect condition due to the river's silt. An inscription on the blade left no doubt about its origin: this weapon was neither Polish nor even Slavic. Frankish craftsmanship identified
It came from modern-day France, forged by a Frankish artisan whose name was well known as a mark of quality on battlefields across Northern Europe. A sword from the 10th century, of the Petersen S type, was discovered intact in the Vistula at Włocławek thanks to the protective action of the river's silt. Inscription reveals origins
The blade bears the inscription "+VLFBERHT+", the signature of a Frankish workshop in the Rhineland, of which approximately 170 copies have been found in Europe. Włocławek, a crossroads of river and land routes frequented by Scandinavians serving the first Piast sovereigns, explains the presence of this Frankish weapon in Poland. Discovery during dredging
A Scandinavian blade buried in the heart of Poland. It all began during dredging work in the port basin of Włocławek, in central Poland. Sławomir Mularski, an excavator operator, noticed a long metal object in the bucket of his machine. At the time, nothing indicated that he had just retrieved a witness from the early Middle Ages from the river's waters. Exceptional preservation
The sword, buried for nearly a thousand years under the sediments of the Vistula, was in an exceptional state of preservation. The silt of the river had played a protective role, limiting oxidation and preserving the details of the blade and the hilt. Local authorities quickly described the discovery as exceptional. Rare find in Poland
And for good reason: only eight comparable swords had been recorded on Polish territory before this find. The shape of the pommel, structured into three distinct lobes, allowed it to be classified among the Petersen S type swords, a well-known typology among archaeologists and generally dated to the 10th century. Frankish signature revealed
The mystery of a signature forged thousands of kilometers away. It was an X-ray that revealed the true secret of this weapon. On the blade appeared an engraved inscription: "+VLFBERHT+". A name that is neither Polish nor even Scandinavian, but which resonates as a Frankish signature, likely from the Rhineland. Historical context of the sword
The Polish archaeologist Robert Grochowski recalled to Gazeta Wyborcza: this type of weapon, often called a "Viking sword" in the collective imagination, was actually forged in modern-day France. Ulfberht was not a warrior or a king, but likely the name of a workshop or a lineage of blacksmiths, whose reputation crossed borders. Widespread distribution
According to Sambor Gawiński, from the provincial conservator of monuments, approximately 170 swords bearing this same inscription have been found across Europe, mainly around the Baltic Sea and in Scandinavia. Each new discovery enriches this still sparse corpus, and each example tells a little more about the history of these blades that traveled far beyond their place of manufacture. Trade routes of the Middle Ages
When Polish rivers served as highways for Viking merchants. Why did a Frankish sword end up at the bottom of the Vistula, far from its place of manufacture? Professor Chudziak provides an element of response by recalling the strategic position of Włocławek. At this location, several major routes crossed: the Vistula river route, an itinerary leading to Kievan Rus', and land routes connecting Cuyavia, Mazovia, and Greater Poland. Evidence of Scandinavian presence
This crossroads explains why objects from Scandinavia regularly turn up in the region. Mateusz Sosnowski, an associate expert in the sword's analysis, recalls that many objects of Scandinavian origin have already been unearthed in a local necropolis. These discoveries suggest the presence of people from northern Europe, probably serving the first Piast sovereigns, who were then building the foundations of the Polish state. Objects traveling across Europe
A Frankish sword could therefore very well have passed through Scandinavian hands before ending up in Polish waters. This is the interest of these trade networks of the early Middle Ages: objects circulated over considerable distances, carried by merchants or warriors who did not hesitate to use the great rivers as liquid roads. Future research on the sword
The sword has since been entrusted to the Nicolas-Copernic University of Toruń for conservation, where it will be the subject of in-depth studies. Beyond the object itself, an entire network of exchanges between France, Scandinavia, and Eastern Europe resurfaces from the waters of the Vistula, reminding us that current borders have never really hindered the circulation of objects, ideas, and people.
