Diagram of the human hand, from Giordano Bruno's discussion of the properties of the number 5 in De monade numero et figura.
De monade numero et figura (On the Monad, Number and Figure) is part of the trilogy of Latin verse works published in Frankfurt in 1591 and considered to be Bruno's philosophical testament. In the De monade Bruno discusses Pythagorean number symbolism and the meanings of the numbers 1 to 10.
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