I can’t seem to find who the author of this pattern is (though I do find a lot of people selling it on stock sites). I have a friend who always refers to it as an M. C. Escher pattern, but I’m almost certain that although I also thought at first it was his, I eventually found out Koloman Moser was the one who authored it. I don’t remember where I got that information, though (or if it was trustworthy or even if I’m recalling it correctly).
Does anyone have a source for it?