A fresh study challenges the long-standing connection between Herodotus’ Pyrene and Germany, arguing that the mysterious ancient place may instead have been imagined near the Pyrenees in western Europe. Researcher Patrick Sims-Williams says ancient geographical texts offer little support for identifying Pyrene with Heuneburg, a major Iron Age settlement in southern Germany. The argument could affect how scholars interpret early written evidence for the Celts in Central Europe.
Herodotus, the fifth-century B.C. Greek historian, wrote that the Danube flowed from a city called Pyrene in the land of the “Keltoi,” or Celts. He placed the Celts in Europe’s far west and described them as living beyond the Pillars of Hercules, the ancient name for the Strait of Gibraltar.
For much of the past century, some researchers have identified Pyrene with Heuneburg in Baden-Württemberg. The fortified settlement stood relatively close to the upper Danube and became an important political and economic center during the sixth and fifth centuries B.C. Sims-Williams argues that Herodotus’ description points much farther west.
Ancient geography points toward the Pyrenees
The study suggests Herodotus may have imagined Pyrene somewhere around the Pyrenees, between modern France and Spain. That would mean the historian was badly mistaken about where the Danube began.
Such an error would fit the limited geographical knowledge available to Greek writers at the time. A map based on the world as Herodotus knew it shows how ancient Greek ideas about distant peoples and places differed considerably from modern geography.
Aristotle later described Pyrene as a mountain in western Celtic territory. He claimed the Danube flowed from it toward the Black Sea. Ancient writers also imagined waterways stretching across Europe and connecting river systems that are actually separate. Sims-Williams argues that these mistaken ideas help explain how Herodotus could have placed the Danube’s source in the far west.
Medieval manuscript offers little support for Heuneburg
The study also examines a text used to support the German identification. A late medieval manuscript of ancient commentary on the “Argonautica” refers to a journey “to Pyrene.” However, an older version of the same text instead refers to “Tyrrhenia.”
A long-held theory about Herodotus’ mysterious Pyrene may be wrong.
A new study argues the ancient place was likely imagined near the Pyrenees, not at Germany’s Heuneburg, raising new questions about early written evidence for the Celts in Central Europe. pic.twitter.com/e5O4X2xJs6— Tom Marvolo Riddle (@tom_riddle2025) September 28, 2026
Sims-Williams says the Pyrene reading may have resulted from a copying error or from a medieval scholar’s familiarity with the Pyrenees or earlier references to Pyrene. The manuscript therefore provides weak evidence for locating Herodotus’ city near the upper Danube, he argues.
Debate reaches beyond Pyrene
The question matters because Herodotus has provided important written support for connecting Early Iron Age southern Germany with the Celts. Archaeological discoveries continue to show a strong Iron Age presence in the region, including a recently uncovered Celtic chariot burial in Germany. The debate in the new study, however, concerns whether such archaeological cultures can be linked to people explicitly identified as Celts in early written sources.
If Pyrene was not Heuneburg, Sims-Williams argues, there is no contemporary written evidence establishing a Celtic presence in southern Germany during the Early Iron Age. That does not mean the Celts were not present there. Heuneburg was a major settlement with extensive long-distance connections, but material remains alone cannot establish the language or ethnic identity of its inhabitants.
Sims-Williams concludes that Heuneburg’s linguistic and ethnic identity during the sixth and fifth centuries B.C. remains unknown. Until stronger textual, linguistic, or scientific evidence emerges, he argues that “Early Iron Age” is a more cautious description of the settlement than “Celtic city.” Heuneburg, the study says, does not need the name Pyrene to demonstrate its archaeological importance.
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