The Cistercian numerals, a remarkable number-notation developed in the late 13th century by Cistercian monks. It involves nine appendages to a vertical stem for the units, tens, hundreds and thousands. With a single stem you can form a cipher representing any integer up to 9999
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A fourteenth-century Norman manuscript unsing the horizontal version of the Cistercian numerals in order to fit the flow of the text
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Fascinating, I'm very surprised I've not seen this before. I wonder what remarkable diagrams would emerge if one were to extend the system to larger orders of magnitude.
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