![](http://www.alamy.com/thumbs/6/E2976804-99AF-4DB6-932B-F0793799EBF4/MMPNHR.jpg)
English: The Arithmetic (lower left view) . second half of 15th century. Appartamento borgia, sala delle arti liberali, aritmetica, dettaglio 02
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Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
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