The Viking Age Codexery — Data & Quality

We publish our audit record because accuracy claims should be checkable. Every entry on this site runs through an automated fact-audit pipeline (accuracy audit → source-grounded repair → visual QA); this page is generated from that pipeline's own report, not written by hand.

Last full accuracy audit: 2026-08-28 · 5 entries checked · 7 flagged · 17 issues confirmed · 2 corrected · 15 still open

Recent findings (audit lane, verbatim)

Harald Hardrada — The entry states Harald made a pact with Magnus the Good to co-rule Norway in 1046, not initially allying with Sweyn II of Denmark against Magnus. Historically, Harald did ally with Sweyn against Magnus before the co-rule pact; in 1045, Harald and Sweyn jointl

Harald Hardrada — The entry says Harald invaded England with 10,000 troops and 300 longships, and that his army was 'wiped out'. Historical sources vary on troop numbers, but the claim that the army was entirely wiped out is an overstatement—some survivors escaped, including Ha

Rollo — The claim that Rollo 'led the ill-fated Siege of Chartres in 911' is misleading: the siege was not ill-fated for him, as it ended with a negotiated treaty granting him lands.

Rollo — The statement that Rollo 'reigned over Normandy until at least 928' is incorrect; his reign ended by 928 at the latest, as his son succeeded him around 927–928.

Bjorn Ironside — [contradicted] Björn Ironside's significance lies in his role as a major Viking leader during the mid-9th century, attested in both Frankish annals and later Norse sagas :: The source states that after his meeting with Charles in Verberie in 858, his name is n

L'Anse aux Meadows — [contradicted] Only confirmed Norse site in North America outside Greenland. :: The source says 'L'Anse aux Meadows is the only undisputed site of pre-Columbian trans-oceanic contact of Europeans with the Americas outside of Greenland.' However, the source als

Vinland — [contradicted] Vinland, also spelled Winland, was an area of coastal North America explored by Vikings around AD 1000, nearly five centuries before the voyages of Christopher Columbus and John Cabot. :: The source states: 'Leif Erikson landed there around AD 1

Freydis Eiriksdottir — [contradicted] Freydis was the half-sister of Leif Erikson according to the Saga of Erik the Red :: The source states that in the Saga of Greenlanders she is described as Leif's full sister, and in the Saga of Erik the Red as his half-sister, so this is not a

Harald Fairhair — [contradicted] The Old Norse epithet hárfagri means 'beautiful-haired', not 'fair-haired' in the sense of blond. :: The source explicitly states that the Old Norse means 'fair, fine, beautiful' and that 'hárfagri' means 'beautiful-haired', not merely 'blond'.

Open data

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Corrections

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