Mjolnir

Thor using the hammer Mjolnir.

Modern Mjöllnir

In Norse mythology, Mjölnir (Old Norse: Mjǫllnir - “Lightning” or “That which smashes”) is the hammer of Thor, the god of thunder and lightning. Forged by the dwarven brothers Brokk and Sindre, Mjölnir is the most feared weapon in the Nine Realms, capable of leveling entire mountains with only one hit. Mjölnir was also a symbol of both fertility and destruction, and was thought to possess regenerative healing powers.

When thrown, Mjölnir would return to Thor's after hitting its target.

"... He [Thor] would be able to strike as firmly as he wanted, whatever his aim, and the hammer would never fail, and if he threw it at something, it would never miss and never fly so far from his hand that it would not find its way back, and when he wanted, it would be so small that it could be carried inside his tunic."^[1]

Other spellings

Common Danish: Mjølner
Faroese: Mjølnir
Icelandic: Mjölnir
German: Mjölnir
Norwegian: Mjølner
Swedish: Mjölner
Finnish: Mjölner

Mjolnir Media

Photograph of a silver-gilded Thor's hammer found in Scania, Sweden, that once belonged to the collection of Baron Claes Kurck.
One side of the Kvinneby amulet
Thor raises his hammer as Loki leaves Ægir's hall, by Frølich (1895)
Ah, what a lovely maid it is! (1902) by Elmer Boyd Smith: Thor is unhappily dressed by the goddess Freyja and her attendants as herself
Þjálfi and Röskva turn away in fear as Thor and Loki face the immense jötunn Skrymir in an illustration (1902) by Elmer Boyd Smith.
The third gift — an enormous hammer (1902) by Elmer Boyd Smith. The bottom right corner depicts the ship Skíðblaðnir "afloat" the goddess Sif's new hair.
The Eyrarland Statue, a statue of a seated figure from about AD 1000 that was recovered at the Eyrarland farm in the area of Akureyri, Iceland.
16th-century depiction of Norse gods from Olaus Magnus's A Description of the Northern Peoples; from left to right, Frigg, Thor and Odin
An early 20th century Danish bicycle head badge depicting Thor holding the hammer Mjölnir
In this 2009 gathering by Icelandic heathen group Ásatrúarfélagið, allsherjargoði Hilmar Örn Hilmarsson wears a reproduction of a historic hammer pendant discovered in Foss, Iceland