Snake paintings in Pompeii, commonly known as agathodaimon (good spirit) frescoes, were painted in Roman households as protective guardians
They adorned lararia (household shrines), kitchens, and garden walls to ward off evil spirits, bring good fortune, and ensure fertility
The depiction of Hellmouth in Werwulf and some of the real ones. It emerged in the Anglo-Saxon art but many believe it originated in Germanic paganism as there's very similar imagery associated with Fenrir slain by Víðarr (Norse myth). I see why Sjón is involved in the script. 👀