Postcards:
Åsgårdsreien (1872) by Peter Nicolai Arbo (Image used by Bathory on the cover of "Blood Fire Death")
Op under Fjeldet toner en Lur (1900) by Theodor Severin Kittelsen (Image used by Burzum on the cover of "Filosofem)
Bought from: https://todestrieb.co.uk/