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De Divina Proportione - a book on mathematics written by Luca Pacioli and illustrated by Leonardo da Vinci, composed around 1498 in Milan and first printed in 1509

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Leonardo da Vinci drew the illustrations for Luca Pacioli's 1509 book De Divina Proportione (The Divine Proportion). Drawing of the Duodecedron Abscisus Elevatus Vacuus, consisting of 120 equilateral triangles, from the manuscript of the book.

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Luca Pacioli http://www.famous-mathematicians.com/luca-pacioli/

Luca Pacioli (1445-1509) Pacioli illustrates one of the methods of finger counting prevalent at his time in Italy.