Each of the five images on the discs & paper cards are illustrations of golden bracteates, a type of medallion made in Northern Europe during the Migration Period of the Germanic Iron Age, around the 400s-600s. https://en.wikipedia.org/wiki/Bracteate Each one is cataloged in Karl Hauck's work "Die Goldbrakteaten der Völkerwanderungszeit: Ikonographischer Katalog" (The Gold Bracteates of the Migration Period: Iconographic Catalogue, archived in "doc/Ikonographischer Katalog"), a three-volume series published in 1985-1989 each consisting of two visual books of illustrations of bracteates, and two text books with information on each one. The first volume also has an introduction book. There are 800 illustrations in total in the Ikonographischer Katalog, and each bracteate is numbered up to IK 567. Although each bracteate that the IDoD discs depict seem to be in this catalog, some of the illustrations are not exact. I have found different illustrations of the same bracteates in another one of Karl Hauck's works, titled "Goldbrakteaten aus Sievern: Spätantike Amulett-Bilder der 'Dania Saxonica' und die Sachsen-'Origo' bei Widukind von Corvey" (Gold bracteates from Sievern: Late Antique amulet images of the 'Dania Saxonica' and the Saxon 'Origo' at Widukind of Corvey, archived in "doc/Karl Hauck Goldbrakteaten aus Sievern.pdf"), published 1970, that seem to more closely resemble the IDoD discs, though not all of them are in that book. Thanks to Ktulu and Autumn for finding the first four in the I.K. and notifying me about this. I found the Sung to the North one myself, which was harder because it was mostly covered up in Jed Bindeman's photo, and the illustration they used for that disc wasn't in the I.K. (the illustration in the I.K. of the same bracteate looked very different). I asked Jed if he remembers which one is Battle Gods and which one is Gorgons. Still waiting to hear back. Each bracteate in the Ikonographischer Katalog is given a category with a letter code. Here's what each letter means. (taken from wikipedia) A-bracteates: showing the face of a human, modelled after antique imperial coins. B-bracteates: one to three human figures in standing, sitting or kneeling positions, often accompanied by animals. C-bracteates: showing a male's head above a quadruped, often interpreted as the Germanic god Woden.[1] D-bracteates: showing one or more highly stylized animals. E-bracteates: showing an animal triskele under a circular feature. F-bracteates: as a subgroup of the D-bracteates, showing an imaginary animal. M-'bracteates': two-sided imitations of Roman imperial medallions. See "googletranslate_IKtext_idodbracteates.txt" for more information on each of these five bracteates, translated directly from the text volumes of the Ikonographischer Katalog. (I just used google translate, so it may not be entirely accurate. I don't speak German.) Between the Real and the Shadow - IK 156 Type A bracteate from Sievern, district of Cuxhaven, Lower Saxony, Germany. This one was easy to find with the images that vom uploaded to discogs (see: "img/BtRatS.jpg"). Illustrations of this bracteate were included in both the Ikonographischer Katalog (which I'll be referring to as "IK" from now on. see: "img/BtRatS_illustration_IK.png") and "Goldbrakteaten aus Sievern" (which I'll be referring to "GBaS" from now on. see: "img/BtRatS_illustration_GBaS.png"). They are both almost exactly the same, but I think the one added to GBaS is a very slightly better match. See "img/BtRatS_photo_IK.png" (taken by P. Berghaus) and "img/BtRatS_photo_GBaS.png" for photos of the bracteate. Found in the Moosmoor during peat cutting. According to the IK, this bracteate depicts a monarch wearing a headdress, with two snakes and a large worm-like creature. The runes at the bottom are transcribed in the IK as "ṛ¹ w r i l⁵ u." Norns - IK 350 Type B bracteate from Southwest Germany. This one was also very easy to find given that I own Norns myself and published photos of it online (see: "img/Norns.jpg"). I did not find an illustration of this bracteate in GBaS, but the illustration in the IK (see: "img/Norns_illustration_IK.png") seems to be more or less a perfect match. See "img/Norns_photo_IK.png" (taken by M. Axboe) for a photo of the bracteate. I have also found what seems to be an earlier illustration of the same bracteate from before the eyelet was torn out and lost in an article published in the Fornvännen Journal of Swedish Antiquarian Research in 1940 titled "Brakteater Från Folkvandringstid" (Bracteates from the Migration Period) and written by Nils Åberg (see: "img/Norns_illustration_BFF.png"). Both sources state the exact source of the bracteate as unknown. Depicts a godess wearing a skirt and jewelry on her chest, sitting in a throne, and holding one long and one short staff in either hand. top right - IK 39 Type B bracteate from Denmark. This is the one that I am most uncertain about. Both the illustration in the IK (see: "img/topright_illustration_IK.png") and GBaS (see: "img/topright_illustration_GBaS.png") seem to match up well for the most part, except for the runes on the right, which do seem slightly off. The illustration from GBaS seems to be a bit of a better match than the IK illustration, though the shading still looks a bit different. It's hard to tell without a higher quality photo of the disc or the card, but I do think that it is the same bracteate, possibly a different illustration of it. See "img/topright.png", "topright_comparison_IK.png", and "img/topright_comparison_GBaS.png" for a comparison of the three illustrations. see "topright_photo_IK.png" and "topright_photo_GBaS.png" for photos of the bracteate. Depicts three humanoid figures with several animals. The figure on the left has two feathered wings, holds a ring-shaped structure, and is wearing a pleated skirt. The figure in the middle is wearing a headband and a costume with a fishbone pattern, with a sword hanging from its arm and holding an object with a long handle and a T shaped end. The figure on the right is wearing a belt and is holding a spear in the left hand and a club in the right hand. There is a bird above the right figure with a long, bent beak. Below the right figure is the head of a dragon- or worm-like creature. Behind the left figure is a snake-like creature moving downward. bottom left - IK 84 Type C bracteate from Holmsland, Ringkøbing County, Denmark. I did not find an illustration of this in GBaS. The illustration in the IK (see: "img/bottomleft_illustration_IK.png") seems to match up perfectly, but the shading looks different. The shadow under the eyelet looks much darker on the paper card with the IDoD disc. Perhaps it is a different illustration of the same bracteate. See "img/bottomleft.png" and "bottomleft_comparison_IK.png" for a comparison of the two illustrations. See "bottomleft_photo_IK.png" for a photo of the bracteate. Found in a gravel pit. Depicts a human head with a hatched hairstyle breathing through the nose. In the front of him is a bird with a sharply curved beak and a triangular tail. Below the human head is a four-legged animal with hooves, pointed ears, and a three-stranded tail. Below the animal's head is a greek cross with dotted ends. Sung to the North - IK 190 Av Obverse side of a double-sided bracteate from Trollhättan area (probably Ladugården farm), Sweden. Obverse side is type B(?). The details of the illustration in the IK (see: "img/SttN_illustration_IK.png") and the illustration in GBaS (see: "img/SttN_illustration_GBaS.png") look quite different, but the GBaS illustration seems to perfectly line up with the Sung to the North disc artwork, from the parts of it that are visible under the paper card. See "img/SttN.jpg" and "SttN_comparison_GBaS.jpg" for a comparison of the two illustrations. See "img/SttN_photo_IK.png" (taken by ATA Stockholm) and "img/SttN_photo_GBaS.png" for photos of the bracteate. Depicts a human with the left hand in an animal's mouth. The human has long hair extending to either side of the head, curled at the ends. In the right hand he/she is wearing a belt and tartan skirt and holding a short stick-like object. The animal to the right has no tail, a curved neck, and has a large, long mouth clasped shut on the human's hand.