Frankish and Alemannic women's belts. Its shape bears a solar significance, showing a twelve-spoke sun wheel looking like a decorative disk of the Merovingians that represented the passage of the visible sun through the months of the year. The design also reminds one of the round table of Arthurian legends where each spoke of the sun wheel represents one "knight" or one officer of the "inner" SS.
Close-up of the now famous Black Sun symbol
It is most likely that this symbol was embedded during the Third Reich but it is only after the Second World War that it was called Die Schwarze Sonne (Black Sun in German), though there is no evidence at all that Himmler's SS linked this symbol with that of the Black Sun. The very association between both seems to be a post-war esoteric interpretation that is still in use in certain scenes of neo-Nazism and Odinism.
Neo-Nazi Black Sun symbol
According to Jean-Michel Angebert (Les mystiques du soleil, 1971) the swastika is actually the Black Sun, i.e., a principle of hidden energy in a multi-dimensional universe beyond the visible world. It is close to Iamblichus' philosophy based on gnosis. Without going so far, the sun wheel possibly had a relation to Germanic sun-based mysticism which was propagated by the SS; the sun was interpreted as "the strongest and most visible expression of God."
Here we find again the opposing traditional concepts of physical objects versus their spiritual expression: the marble Black Sun symbol from Wewelsburg vs. the inner light of a mystical universal and its creative energy. In the same way, the material cup of the Grail can be opposed to the alchemical properties of the beverage it holds, i.e., spiritual immortality. We can draw the comparison even further with the Sol Invictus ("Invincible Sun"), which was the official sun god of the later Roman Empire, who seems to have inspired Himmler's sun mysticism.
In 274 AD the Roman emperor Aurelian made it an official cult, alongside the traditional Roman cults. But like the inner light of the Black Sun, or the immortality and/or mystical knowledge hidden in the Grail, the Sol Invictus stood for a spiritual sun, a metaphysical concept, only accessible to initiates, not just the physical sun visible to the exoteric crowds.
All these stories surely added up to the myth that Castle Wewelsburg was an esoteric center, hiding not only rare historical artifacts (like the fake Celtic Cauldron of genuine pure gold recently found in the Chiem Lake in Germany) brought in by the Ahnenerbe but also the deepest spiritual secrets about the origins of the Nordic race.
Weisthor, Himmler's Rasputin – Karl Maria Wiligut, aka Weisthor, headed a Department for Pre-and Early History that was created within the SS Race and Settlement Main Office (RuSHA). There, he developed the plans for the rebuilding of the Wewelsburg into a pseudo-religious center for the SS elite.
During the 1920s, he designed his own runic alphabet with mostly alternative meanings from the mainstream Futhark and wrote with them 38 verses called the Halgarita Sprüche.
He claimed to have memorized these verses as a child, when taught by his father. Werner von Bülow and Emil Rüdiger of the Edda-Gesellschaft (Edda Society) claimed some verses are connected with the Black Sun, like verse number 27 which would be a 20,000-year-old "solar blessing" according to Willigut:
Sunur Saga santur toe
Syntir peri fuir Sprueh
Wilugoti Haga tharn
Halga fuir santur toe.
which translates, according to Werner von Bülow, more or less as follows, and taking into account that this language exists probably only in Weisthor's brain:
"Legend tells, that two Suns, two wholesome in change-rule UR and SUN, alike to the hourglass which turned upside down ever gives one of these the victory The meaning of the divine errant wandering way dross star in fire's sphere became in fire-tongue revealed to the Earth-I-course of the race of Paradise god willing leaders lead