Work C.1.31

# Theon of Alexandria

Commentary on the Almagest

## Content

A commentary on the *Almagest* mixing three Greek sources: Theon of Alexandria for Books I-II, IV and VI-X and XII-XIII; Nicolaus Cabasilas for Book III; and Pappus of Alexandria for Book V. All Greek MSS have a lacuna from the end of Book X to the beginning of Book XII (see Rome, xxi) and this lacuna has also affected all Latin translations which have Books X-XII.

## Bibl.

A. Rome, ‘The Calculation of an Eclipse of the Sun according to Theon of Alexandria’, *Proceedings of the international congress of mathematicians*, Providence, 1950, 209-219;* *A. Tihon, ‘Le Livre V retrouvé du *Commentaire à l’Almageste* de Théon d’Alexandrie’, *L’Antiquité Classique* 55 (1987), pp. 201-218; A. Jones, ‘Theon of Alexandria’s Observation of the Solar Eclipse of A.D. 364 June 16’, *Journal for the History of Astronomy* 43 (2012), pp. 117-118; J. Christianidis, I. Skoura, ‘Solving Problems by Algebra in late Antiquity: New Evidence from an Unpublished Fragment of Theon’s Commentary on the *Almagest*’, *SCIAMVS* 14 (2013), 41-57; J. M. Steele, ‘The Eclipse of Theon and Earth’s Rotation’, in *New Insights From Recent Studies in Historical Astronomy: Following in the Footsteps of F. Richard Stephenson*, eds W. Orchiston, D. A. Green, R. Strom, Heidelberg-New York, 2015, 47-51.

## Ed.

The Greek text was first published by Simon Grynaeus and Joachim Camerarius in 1538 (Basel, Johannes Walderus), as second part to Ptolemy’s *Almagest*, on the basis of a MS which belonged to Regiomontanus (Nürnberg, SB, Cent. V App. 8). Critical edition by A. Rome, *Commentaires de Pappus et de Théon d’Alexandrie sur l’Almageste*, Vaticano, 1931-1943, 3 vols. An older edition of Books I-II, together with a French translation was made by N. Halma, *Commentaire de Théon d’Alexandrie sur le premier livre de la composition mathématique de Ptolémée*, Paris, 1821;* *N. Halma, *Commentaire de Théon d’Alexandrie sur le second livre de la composition mathématique de Ptolémée*, Paris, 1821.

## Latin translations

Theon of Alexandria, Commentary on the Almagest (tr. Johannes Hommel) (C.1.31.1)

Theon of Alexandria, Commentary on the Almagest (tr. 1556?) (C.1.31.2)

Theon of Alexandria, Commentary on the Almagest (tr. Federico Commandino) (C.1.31.3)

Theon of Alexandria, Commentary on the Almagest (tr. Henry Savile) (C.1.31.4)

Theon of Alexandria, Commentary on the Almagest (tr. Giovanni-Battista Teofilo) (C.1.31.5)

Theon of Alexandria, Commentary on the Almagest (tr. Jerόnimo Muños) (C.1.31.6)

Theon of Alexandria, Commentary on the Almagest (tr. Giambattista della Porta) (C.1.31.7)

Theon of Alexandria, Commentary on the Almagest (tr. anonymous, 16th c.) (C.1.31.8)

Theon of Alexandria, Commentary on the Almagest (tr. David Sainclair) (C.1.31.9)