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Ptolemaeus Arabus et Latinus

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Vatican, Biblioteca Apostolica Vaticana, Vat. lat. 6788

s. XIII.


glosses by Laurentius de Messasal, bishop of Agrigento (Sicily) from 1422 to 1442 (cf. f. 7r: ‘… ego Laurentius episcopus Agrigentius anno… 1424’; the same signature is found f. 7v, 8r, 8v and 9r, with the dates 1425, 1423, 1435 and 1436). Laurentius de Messasal also copied MS Palermo, CSF, 4 (see).

Parchment, 178 f., a single hand, painted initial f. 1r.

Ptolemaica (single text), except for a full chapter index of the Almagest, apparently by another hand (178ra-178vb).


Inventarium codicum Latinorum Bibliothecae Vaticanae, VIII (handwritten catalogue by A. Ceccucci, dated 1882).


‘In nomine Albuguafe in libro suo quem scientiarum electionem et verborum nominavit… (1v) Bonum quod fecerunt in eo quod video in eo illi qui perscrutati sunt… (2v) Ecce ubi primi capituli prime dictinctionis initium dedit. Bonum domine fuit quod sapientibus non deviantibus visum est — et honestum est ut ponamus hoc finem libro. Expleta est dictio 13 libri Almagesti et cum ea completur liber Ptolomei de disciplinalibus.’

= Ptolemy, Almagesti (tr. Gerard of Cremona) (A.1.2), Class B. Translator’s preface, 1r-1v; I, 1v-14r; II, 14r-34v; III, 34v-46v; IV, 46v-60r; V, 60r-77v; VI, 77v-92r; VII, 92r-103r; VIII, 103r-113v; IX, 113v-130r; X, 130r-139r; XI, 139r-153r; XII, 153r-164r; XIII, 164r-178r. Chapter I.1 is given in two versions: Isḥāq’s version, 1v-2v, and the standard al-Ḥajjāj’s version, 2v-3r. Corrections by the scribe throughout and substantial glosses by Laurentius de Messasal on f. 7r-9r, 11v-12v and 13v-17r. A selection of these glosses (f. 11v-12v) have been edited by H. Zepeda, The Medieval Latin Transmission of the Menelaus Theorem, PhD Dissertation, University of Oklahoma at Norman, 2013, 373-376.