The first printed Arabic version of Euclid’s *Elements* was in 1594 by the Medicean Press in Rome. It was based on an earlier 1260 manuscript by Nasīr al-dīn al-Tūsī, a well-known and influential Persian mathematician and astronomer. The copy at the Linda Hall Library of Science, Engineering & Technology is interesting since it was never bound. It is possible for readers to see what a book purchased in the 16^{th} century directly from the publisher would have looked with its folded, unstitched, and uncut sheets.

For more on al-Tusi’s commentary of Euclid’s *Elements*, visit “Nasir al-din al-Tusi's Commentary on Euclid's Elements” by Frank J. Swetz and Victor J. Katz in *Convergence.*

The call number for this work is QA31.E86 1594.

*Images in this article were taken by the author at the Linda Hall Library of Science, Engineering & Technology and are used with permission. The images may be downloaded and used for the purposes of research, teaching, and private study, provided the Linda Hall Library of Science, Engineering & Technology is credited as the source. For other uses, check out the LHL Image Rights and Reproductions policy.*

### References

Swetz, Frank J., and Victor J. Katz. "Mathematical Treasures - Nasir al-din al-Tusi's Commentary on Euclid's Elements." *Convergence* (January 2011). http://www.maa.org/press/periodicals/convergence/mathematical-treasures-nasir-al-din-al-tusis-commentary-on-euclids-elements.

O'Connor, J. J., and E. R. Robertson. “Nasir al-Din al-Tusi.” *MacTutor History of Mathematics Archive.* http://www-history.mcs.st-and.ac.uk/Biographies/Al-Tusi_Nasir.html.

“Medici Oriental Press.” *Wikipedia*. https://en.wikipedia.org/wiki/Medici_Oriental_Press.

Nasr, Seyyed Hossein. “Al-Ṭūsī, Muḥammad Ibn Muḥammad Ibn Al-Ḥasan Usually Known as Naṣir Al-Dīn.” In *Dictionary of Scientific Biography*, edited by C. C. Gillespie, *xiii:*508–513. New York: Scribner, 1972.

Index to Mathematical Treasures