A handle that turned out too short, a fly at the bellows and over a thousand silver amulets in the earth: Thor's hammer is the best-known symbol of the Viking Age – and its true story is even better than the myth. We separate cleanly what is proven, what remains legend, and what was invented only later.
How Mjölnir Was Forged
The fullest account comes from the Icelandic scholar Snorri Sturluson, around 1220, in the Prose Edda (Skáldskaparmál). It begins with a prank by Loki: he has secretly cut off the goddess Sif's golden hair. To save his own head, he pits two dwarven smithies against each other. The brothers Brokkr and Eitri (in later versions the smith is called Sindri) are to make three treasures that outshine everything before.
While Eitri works the iron, Brokkr keeps the bellows going. Loki turns into a fly and stings the dwarf – twice Brokkr holds firm; on the third piece the fly stings his eyelid, blood clouds his sight, and Brokkr lets the bellows falter for a heartbeat. That is why the hammer's handle came out too short. From the forge came the boar Gullinbursti, the ring Draupnir and the hammer Mjölnir.
Myth. According to Snorri, Mjölnir strikes whatever Thor aims at and never misses; it returns to his hand when thrown; and it can be made small enough to carry inside his tunic. Its only flaw: the short handle. That is Edda narrative – not an excavation report, but poetry, written down roughly two centuries after the Viking Age had ended.
The famous Eyrarland statue (around 1000, National Museum of Iceland): a small bronze figure holding an object before its chest. Usually read as Thor with his hammer – but the grip-like beard also allows the reading “seated Christ with a cross”. Photo: L3u, CC BY-SA 3.0, via Wikimedia Commons.
From Axe to Hammer – What Is Certain and What Is Not
The hammer is both tool and weapon – and that is exactly the source of its symbolic power. A god who wields the lightning with a striking weapon is an ancient Indo-European motif; linguistically Mjölnir is linked, among other ideas, to the Slavic word for “lightning” (molnija), which would give “lightning-maker”. That etymology, however, is explicitly disputed.
Evidence. Rudolf Simek and more recent scholarship derive the hammer amulets cautiously from an older pendant tradition – a connection with the Germanic “Hercules-club” pendants of the Roman period is also discussed. Phrasing such as “appears to have developed” is deliberately kept open.
Careful – a popular story. A neat line from “Bronze-Age battle-axe → Viking hammer” is appealing but not proven. Between the Bronze-Age rock carvings showing axe- or hammer-bearing figures and the Viking-Age amulets lie some fifteen centuries with no unbroken chain. To say “from axe to hammer” describes a plausible kinship of thunder-god symbols – not a proven family tree of one single object.
Over 1,000 Amulets – What the Archaeology Shows
Roughly a thousand Thor's-hammer pendants have been found so far, scattered across Scandinavia, England, northern Germany, the Baltic and the Rus lands as far as Iceland. The peak lies in the late Viking Age, above all the 10th century. Most pieces are plain silver or iron, more rarely amber – lavish examples with filigree and granulation are the exception.
Evidence – the “hammer beside the cross”. At Trendgården (Jutland) a soapstone mould of the late 10th century was found that cast Thor's hammers and Christian crosses at the same time (National Museum of Denmark). It is hard proof of the two faiths existing side by side in the age of change – and supports the view that in the 10th century the hammer was also worn as a visible pagan answer to the ever more common little cross.
A real find: the silver Thor's-hammer amulet from Erikstorp (East Gotland, Sweden), richly decorated with interlace and granulation. Short handle, broad head – the typical form. Image: public domain (heliotype after Pacht), via Wikimedia Commons.
“This Is a Hammer” – the Runic Hammer of Købelev
For a long time scholars wondered whether the little pendants depicted Thor's hammer at all. In 2014 a find on Lolland (Denmark) settled it: a silver pendant of the 10th century carries interlace on one side and a runic inscription on the other – “hmar × is”, read as “this is a hammer”. It is the only Thor's hammer known with a runic inscription and confirms what the amulets are.
Evidence. The runic hammer of Købelev was discovered by a metal detectorist and examined at the National Museum in Copenhagen; the 10th-century date and the reading of the inscription are considered secure.
Did Only Women Wear Thor's Hammer?
You often hear and read it: that Thor's hammer was a “women's symbol”. The claim is too sharp – but it has a true core.
What the research says. The Swedish archaeologist Jörn Staecker presented the definitive typology of cross and hammer pendants in 1999 (Rex regum et dominus dominorum, Lund). His finding: where hammer amulets appear in graves at all, they are found predominantly in women's graves – interpreted towards protection, fertility and household ritual. Among the central-Swedish Thor's-hammer rings (iron rings with attached hammers) the identifiable female burials at Birka also clearly predominate.
Why “only women” is still wrong. First, only about 10 percent of all amulets come from graves at all – the great majority are from settlements and silver hoards, that is, gender-neutral contexts. Second, men's graves with hammer amulets are attested too; at Birka several men stand against the women. Put honestly: Thor's hammer is more often attested with women, but by no means worn exclusively by them.
“Thor, Hallow!” – the Hammer as Blessing, Not Only Weapon
Mjölnir smashes giants' skulls – but in the sources it hallows and blesses just as often. In the eddic poem Þrymskviða a giant steals the hammer; Thor has to attend the wedding disguised as a bride. When the hammer is carried in “to hallow the bride”, Thor seizes it. The hammer is laid in the bride's lap – a gesture of blessing at a marriage.
“Bring in the hammer to hallow the bride; on the maiden's knees let Mjöllnir lie.”Þrymskviða, st. 30, after the translation by Henry Adams Bellows (public domain)
This fits the scene in the Gylfaginning where Thor slaughters his two goats, eats them, and in the morning brings them back to life with the raised hammer. And on several runestones Thor is invoked to “hallow” the monument – for instance on Glavendrup, Sønder Kirkeby, Virring and the Swedish Velanda; the stone at Læborg even carries a carved image of a hammer.
Remarkable. Thor is the only god expressly invoked to hallow on Viking-Age runestones. The hammer was thus at least as much a sign of blessing as of battle.
From our workshop: Thor's hammer Mjölnir, laser-engraved deep into real slate. If you would rather wear the sign, you'll find pendants in our nature jewellery. See it in the shop →
Why Thursday Is Thor's Day
When the Germanic peoples adopted the Roman order of weekdays, they put their own gods in place of the Roman ones: the dies Iovis, the day of thundering Jupiter, became the day of the Germanic thunder god Donar/Þunraz – giving English Thursday and German Donnerstag. So Thor still carries a weekday to this day.
Honest separation matters to us: when we engrave a sign, we're happy to tell you what is proven and what remains legend. More of that in our post on real and invented Viking symbols or in the Rune Lexicon.
Sources & Studies
Snorri Sturluson, Skáldskaparmál (Prose Edda, c. 1220) – the forging of Mjölnir.
Þrymskviða (Poetic Edda); English translation Henry Adams Bellows, 1923 (public domain).
Jörn Staecker, Rex regum et dominus dominorum. Die wikingerzeitlichen Kreuz- und Kruzifixanhänger als Ausdruck der Mission in Altdänemark und Schweden, Lund Studies in Medieval Archaeology 23, Stockholm/Lund 1999 – typology and grave contexts (women's / men's graves).
Rudolf Simek, Dictionary of Northern Mythology (entries “Thor”, “hammer”, “Mjöllnir”).
National Museum of Denmark, Copenhagen: mould from Trendgården (cross and hammer from one mould); examination of the Købelev runic hammer, 2014.
Eyrarland statue – National Museum of Iceland; scholarly debate on its interpretation (Thor / gaming piece).
A note on honesty: the Edda texts were written down only in the 13th century, in Christian Iceland. They are our main source for the myths, but not a record of the Viking Age. Where find and text agree, we say “evidence”; where only the saga speaks, we say “myth”.
