Possibly the largest 19th century xylothek (wood library) in the world is held in Alnarp, Sweden. The "books" are made in the wood they describe and contains leaves, fruits, nuts, etc. This one has 217 species/books. https://www.slu.se/en/subweb/library/use-the-library/search-and-find/special-collections/wooden-library/

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