Project icon: lavishly furnished initial letter with a painting of Ptolemy using an astrolab.

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

Vatican, Biblioteca Apostolica Vaticana, Ottob. lat. 2234

s. XIV1.


perhaps northern Italy (mention of Cremona f. 64v).


fainted or erased note on f. 64v, perhaps in the hand of the glossator: ‘Iste liber est … (?) 1396 die 8 (?) Octobris … (?)’; Cardinal Marcello Cervini (1501-1555); Cardinal Guglielmo Sirleto (1514-1585).

Parchment, 64 f., one or two similar hands (f. 2ra-42ra and 43ra-64r), with a third, contemporary or somewhat later hand, responsible for the glosses and for the added notes f. 1r-1v, 42ra-42vb and 64v, decorated initials.

Astronomy: added notes on the length of the solar year, mentioning the years 1297 and 1336, with two tables of planetary positions, which do not seem to make sense (1r); added list of theorems (?) ‘Prima duodecimi libri. Prima: Omnium duarum superficierum…’ (1v); Ptolemaica (2ra-42ra); added note: ‘Iste modus est sufficiens in arte eptagoni cadentis in circulo…’ (42ra-42vb); Menelaus, Spherica (43ra-53vb); ‘Volo ostendere quod omnium trium linearum proportionalium…’ (53vb); Theodosius, Spherica, tr. Gerard of Cremona (54ra-64rb); added astronomical notes mentioning the city of Cremona (64v).


Inventarii codicum manuscriptorum Latinorum Bibliothecae Vaticanae Ottobonianae (handwritten catalogue), II, 185v; J. F. Daly, C. J. Ermatinger, ‘Mathematics in the Codices Ottobiani latini’, Manuscripta 9 (1965), 12-29: 22-23; F. Fossier, ‘Premières recherches sur les manuscrits latins du cardinal Marcello Cervini (1501-1555)’, Mélanges de l’Ecole Française de Rome. Moyen Age, Temps Modernes 91 (1979), 381-456: 443 (no. 464) and 450.


‘… [erased title]. Scientia species habet quarum melior post scientiam (40vb) sunt digniores ut evanescant et destruantur. Completa est declaratio eius. Completus est tractatus novus, est ultimus libri.’

= Geber, Liber super Almagesti (C.1.2). Preface, 2ra-2va; I, 2va-5va; II, 5va-10va; III, 10va-12va; IV, 12va-16vb; V, 16vb-23ra; VI, 23ra-29ra; VII, 29ra-34va and 41ra-41va; VIII, 41va-42ra and 35ra-37rb; IX, 37rb-40vb. F. 41-42 should be placed between f. 34 and 35. A few glosses. The title of the book is given twice f. 1v: ‘Liber astrologie Ieber’ (contemporary hand, perhaps that of the scribe) and ‘Geber de astrologia’ (later hand).