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There is a page named "File:Arithmeum (Bonn) jm01671.jpg" on Wikipedia
original image is provided: //commons.wikimedia.org/wiki/File:Arithmeum_(Bonn)_jm01671.jpg A copy of, or the Uniform Resource Identifier (https://creativecommons...(5,743 × 4,088 (1.76 MB)) - 20:05, 13 September 2023
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