There are a number of sources for images of medieval Scandinavian horses, but fewer for Sleipnir, Odin’s eight-legged horse. Sleipnir was the offspring of Loki and the stallion Svaðilfari. In response to a comment on a LH thread, here is a sampling of Nordic medieval horse images, both four-legged and eight-legged.
(click for larger image)
From Cultural Atlas of the Viking World, ed. James Graham-Campbell:
1. Sleipnir, 8th c. picture stone, Gotland
2. Sleipnir and another horse on a Gotland stone.
3. Fat horse and rider on Migration era bracteate from Sweden
4. Fragment of Queen’s tapestry with horses from Oseberg blue clay burial, maybe Queen Asa.
5. Sleipnir, 8th-9th century Gotland Stone
6. Horses on reconstruction of Oseberg tapestry
7. Sigurd’s horse Grani carries Fafnir’s treasure on his back
8. Horses? dragons? unicorns? whalebone plaque from Scotland
9. Beast in Ringerike style, (considered to be best example of this style) Ginni and Toki’s tomb, St. Paul’s in London
The Viking, Bertil Algren, et al.
10. Horse-drawn passenger wagon illustration from Oseberg tapestry fragment.
11. Bayeux tapestry, Horses in Battle of Hastings
12. Bayeux tapestry, Duke William’s Norman cavalry
(Bayeux tapestry from this group out of order at end of list)
13. Oseberg tapestry fragment closeup, horse cart
14. Dangeld money payment in silver coins
15. Creature? Swedish bronze weathervane from Swedish ship prow
16. Sleipnir from Gotland picture stone
17. Horse shaped silver gilt ornament, one of a pair, originally made as a pair of broaches, from Birka woman’s grave
From The Vikings, Johannes Brondsted
18. Sleipnir on Gotland tombstone; horses on Dynna, Norway runic stone
19. Horse with coiled joints on Ramsund rock in Sweden
From The Vikings, O. Madsen
20. Horses in Viking boats, “Queen Matilda” tapestry, Bayeux
21. “Early Viking Warriors” (on horses)
22. “The famous Viking Knut fighting the king of England” (horse line drawings)
23. “Trinket, Sweden 9th century” (figure on horse)
24. Stele for engraved stone from Haggeby, Uppland, horses with either curled tongues or singing with moons on their heads (left), and Motifs from stone found in Gotland (lower right)
From The World of the Norsemen, Eric Oxenstierna
25. Horse (four legs) on pictoral stone from Klinte, Gotland
out of order:
26. Bayeux tapestry, Norman horses in color (from The Viking, Bertil Algren, et al.)