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Schneeballen - considered the most famous of Rothenburg pastries, they're supposed to be pie crusts crumpled into a ball. There are tons of different flavours, with different coatings. Not sounding too appetizing, I never did try one; I was especially turned off when I read that they would keep in a cool, dark place for a couple of months.
You can also see a specialized tool they have to retrieve the Schneeballen. Or perhaps I'm wrong and it's not a Schneeballen device, but a castration tool!