Picture stone from Tängelgårda (Gotland, Sweden) presented at the exhibition in the Swedish History Museum in Stockholm.
In this fascinating picture stone were depicted women, men, horses walking in procession, three birds of prey flying above them. What is interesting below chest of a one horse were painted two symbols known as valknuts. Detailed analysis of picture stones from Gotland is included in Sigmund Oehrl’s monograph entitled ‘Die Bildsteine Gotlands: Probleme und neue Wege ihrer Dokumentation, Lesung und Deutung’.
More information concerning so-called valknut can be found in Tom Hellers’ book ‘Valknútr: Das Dreiecksymbol der Wikingerzeit’. This symbol was also discussed by Eirik Storesund in fascinating post ‘The "Valknútr" Does Not Exist‘ on Brute Norse blog.