Mjölnir

Thor's hammer — protection, blessing (hallowing of brides and the dead); worn as a pendant in answer to the Christian cross.
Tradition: norse, germanic · Period: Thor's-hammer pendants, 9th–11th c. (e.g. Skåne, Birka)
Figures: Thor
Sources
Image: Public domain · Thor's_hammer,_Skåne.jpg: Chemityped by Prof. Magnus Petersen from an Electrotype in the possession of Herr Steffensen, Conservator to the Danish Museum. derivative work: Arnaud Ramey (talk) · source. Please keep this credit when you use it.