"Freyr with his hog Gullinbursti" by Johannes Gehrts from the book 'Walhall : Germanische Götter- und Heldensagen für Alt und Jung am deutsche Herd erzählt', by (Kreuznach : R. Voigtländer, 1888)
One of four eighth-century picture stones from Stora Hammars farm: it contains six panels with several scenes interpreted as depictions of Norse myth and legend, including a figure wielding a valknut
A Viking Age picture stone from Gotland, featuring scenes often interpreted as mythological in nature, including a procession featuring valknut symbols