The Stenkvista runestone, designated as runic inscription Sö 111 in the Rundata catalog, is a memorial runestone located near the church at Stenkvista, which is two kilometers east of Skogstorp, Södermanland County, Sweden, which was formerly part of the historic Södermanland, and which features a depiction of Thor's hammer, Mjöllnir.
http://en.wikipedia.org/wiki/Mj%C3%B6llnir