I was just going down a rathole, learning about this image I stumbled across on Neil Gaiman’s tumblr:
I was stuck by how much these 14th and 15th century symbols resemble modern electronic diagrams, such as this:
I’m not sure what to make of that though, since the first image shows the 72 Sigils of the demons listed in the Ars Goetia. That was one part (of five) from a book put together in the 17th century, called The Lesser Key of Solomon.
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