Sigurd stones

The Sigurd stones form a group of eight or nine Swedish runic inscriptions and one picture stone that depict imagery from the Germanic heroic legend of Sigurd the dragon slayer. They were made during the Viking Age and constitute the earliest Norse representations of the matter of the Völsung cycle that is the basis of the Middle High German Nibelungenlied and the Sigurd legends in the Poetic Edda, the Prose Edda, and the Völsunga saga.

In addition, the figure of Sigurd sucking the dragon's blood from his thumb appears on several carved stones in parts of Great Britain with strong Scandinavian cultural influence: at Ripon and Kirby Hill, North Yorkshire, at York and at Halton, Lancashire, and carved slates from the Isle of Man, broadly dated c. 950–1000, include several pieces interpreted as showing episodes from the Sigurd story.

Source: Wikipedia