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

Ptolemaeus Arabus et Latinus

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Lyon, Bibliothèque Municipale, 172

s. XVin (the years 1418-1420 are given as examples in a section of computus f. 103r).

Or.:

southern Germany.

Prov.:

Lyon, couvent des Grands-Augustins.

Parchment, 124 f., one main hand, magnificently illustrated MS.

Astronomy, astrology and computus: figure of the celestial spheres (1r); comm. on Sacrobosco’s De sphera ‘Ex quo in hoc libro determinatur de astronomia. Sciendum est quod assignatur differencia inter astronomiam et astrologiam…’ (1va-21v); Ptolemaica (23r-34r); astronomical diagrams (34v-40r); on the constellations ‘Artophilax sive Boetes: huius manum sinistram circulus…’ (41ra-50ra); ‘Cubitum autem est in quo longitude, latitude et profunditas…’ (51r-51v); Ptolemaica (52r-52v); diagram: spheres of Venus and Mercury (53r); astronomical diagram, unfinished (53v); lunarium ‘Prima die incesionis Lune sanguinem minuere licet tota die, sompnium in gaudium, cito evadet…’ (54r-55r); reworked excerpts from the Alchandreana ‘Planete que sunt de aqua et foco…’ (55r-56v); ‘Martii signum sunt Pisces, in quo mense oritur initium Piscis…’ (56v-58v); astronomical tables with canons (59r-69r); Robertus Anglicus, Quadrans vetus (69v-81r); calendar (83r-88v); table for computing the zodiacal position of the Moon (89r); ‘Ad inveniendum quinque festa mobilia per claves anni. Si vis invenire quinque festa mobile…’ (89v-92v); astronomical calendar (93r-98v); table for computing the zodiacal position of the Moon (99r), with canon (99r-99v); ‘Si quis per hunc kalendarium scire voluerit qua die, qua hora et qua parte hore…’ (99v-100v); table: De electionibus secundum cursum Lune per XII signa (101r); ‘Triginta dies periculosi. Notandum quod quolibet anno sunt 30 dies periculosi…’ (101v-102r); ‘Sciendum est quod prima hora debet dari Saturno…’ (102r-102v); short paragraphs of astrology, astronomy, medicine and computus (102v-103r); table: horologium (103v); table for computing the zodiacal position of the Moon (104v); astronomical calendar (105r-110v); computus, in German (111r-119v); Revelatio Esdrae ‘Feria prima, hiemps bona, ver ventosum, estas sicca…’ (121r-121v); ‘Quibus terris quodlibet signum presit. Aries habet terram Caldeorum in oriente…’ (121v); astronomical tables (124r-124v). Blank: 22, 40v, 50v, 81v-82v, 104r, 120, 122-123.

Lit.

A.-F. Delandine, Manuscrits de la bibliothèque de Lyon, I, Paris-Lyon, 1812, 175-176 (no. 104); Catalogue général des manuscrits des bibliothèques publiques de France. Départements, XXX, Paris, 1900, 33-34; D. Blume, M. Haffner, W. Metzger, Sternbilder des Mittelalters und der Renaissance. Der gemalte Himmel zwischen Wissenschaft und Phantasie, II: 1200-1500, Berlin, 2016, 2 vols, II.1: Text und Katalog der Handschriften, 480-486.

23r‑34r

‘Summa principiorum et eorum que oportent prescriri in scientiam astronomie et ad librum Ptholemei Almagesti, et ad intelligendum tractatum de spera. Equator diei est circulus maior in spera occulta que describitur super duos polos ― secundam vero denigrabo et tertiam rubricabo, unde sequitur figura etc.’

= Thebit Bencora, De hiis que indigent expositione antequam legatur Almagesti (C.1.1)

, in a reworked and expanded version (same in MS Basel, UB, O.IV.4). No glosses.

52r‑52v

‘In libro de iudiciis planetarum Ptholomeus. Sub Saturno sunt hec signa, Capricornus et Aquarius, et est eius domus, in Libra regnare, in Ariete regnum abstrahit — (Luna) complet cursum suum viginti et octo diebus etc.’