21. Sacrobosco: Sundials The Tractatus de quadrante derives in some measure Thus, while sacrobosco s treatisewas inadequate in this the Quadrans vetus of johannes Anglicus, written in http://www.hps.cam.ac.uk/starry/sacrosund.html

Links Sundial Tour (Next) Previous Sundial Pages Sundials Calendar Reform Poetry Ptolemy ... Previous Sacrobosco Pages Sacrobosco Calendar Reform Mathematical Techniques Armillary Sphere ... Index Sacrobosco and Sundials The quadrans vetus or old quadrant, so called to distinguish it from the quadrans novus or astrolabe-quadrant devised by Profatius (Jacob ben Machir ibn Tibbon; d. 1305), was an instrument which could be used to solve problems in surveying and, from observations of the sun, to find the time. As such its description was often included in early-modern treatises on dialling. The picture shown here comes from (Strasbourg, 1539). Larger Image (93K) Very Large Image (1.7M) Sacrobosco's Tractatus de quadrante describes the construction and use of the quadrans vetus. He discusses two forms of the instrument, both of which could be used to find the time in unequal hours. The simpler version required the use of tables from which the noon altitude of the sun could be derived for any day of the year. Sacobosco appears to have been working with a particular set of tables, derived from the Humeniz Tables compiled in Paris in 1239. The more sophisticated form of quadrant had, as in the picture, a scale co-ordinating the astronomical and civil calendars which indicated the noon solar altitudes, and which could be placed according to the observer's latitude; this substituted for the tabulated data. The Tractatus de quadrante derives in some measure from earlier medieval treatises, in particular the

22. Brief Chronology Of Holywood, Dumfriesshire, Scotland c1210 John of Holywood (11951256) or johannes de sacrobosco, famous medieval authorof de Sphaera and other mathematical texts in use for four centuries, was http://www.btinternet.com/~e.johnston/holywood/chronology.html

Chronology Based on statistical, census and antiquarian accounts Neolithic - Earthwork causeways (cursus), burials and, later, at least one stone circle (later dubbed ' The Twelve Apostles ') built through the parish. The area was a religious/ceremonial/occupation centre of some significance. 6th century AD - Irish preacher Congal (?) said to have settled in the oaken wood (Dair Congal in gaelic is 'the oak of Congal'). Said to have died in 602. 'Reviresco', 'Holywood: A Forgotten Dumfriesshire Abbey', Gallavidian Annual (1922), pp. 4-40. Late 12th century - 'Reviresco' suggests that John, Lord of Kirkconnell of the Maxwell family was responsible for the establishment of Holywood Abbey c1121. Later historians put the foundation closer to 1180. The abbey was founded by the Premonstratensian Order, which followed the rule of St. Augustine. Six other monasteries of this Order were founded in Scotland, including Saulseat, Whithorn and Tongland in Galloway. The Abbey was documented by the names Dercongal, Drumcongal, Dercongall (Celtic); Sacro Bosco, Sacri Nemoris, Sancti Nemoris Halywood (Latin); St.Bois, Saint Boyse, Seint Boyse, Le Wod (French); Haliwood, Halywood, Holtwood, Holywood and Holy Wood (Anglo-Saxon). John of Holywood (1195-1256) or Johannes de Sacrobosco, famous

23. Detailed Record Contents The Sphere of johannes de sacrobosco; Latin text.The Sphere of sacrobosco;English translation.The Commentary of Robertus Anglicus; Latin text http://worldcatlibraries.org/wcpa/ow/4ef58928e34b4a57a19afeb4da09e526.html

About WorldCat Help For Librarians The Sphere of Sacrobosco and its commentators. Lynn Thorndike Joannes de Sacro Bosco Robertus, Anglicus Find libraries with the item Enter a postal code, state, province or country WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries.

24. Lebensdaten Von Mathematikern Translate this page Saccheri, Giovanni Girolamo (5.9.1667 - 25.10.1733) sacrobosco, johannes de (1195- 1256) de Saint-Venant, Adhemar (1797 - 1886) Saint-Vincent, Gregorius (1584 http://www.mathe.tu-freiberg.de/~hebisch/cafe/lebensdaten.html

Diese Seite ist dem Andenken meines Vaters Otto Hebisch (1917 - 1998) gewidmet. By our fathers and their fathers in some old and distant town from places no one here remembers come the things we've handed down. Marc Cohn Dies ist eine Sammlung, die aus verschiedenen Quellen stammt, u. a. aus Jean Dieudonne, Geschichte der Mathematik, 1700 - 1900, VEB Deutscher Verlag der Wissenschaften, Berlin 1985. Helmut Gericke, Mathematik in Antike und Orient - Mathematik im Abendland, Fourier Verlag, Wiesbaden 1992. Otto Toeplitz, Die Entwicklung der Infinitesimalrechnung, Springer, Berlin 1949. MacTutor History of Mathematics archive A B C ... Z Abbe, Ernst (1840 - 1909) Abel, Niels Henrik (5.8.1802 - 6.4.1829) Abraham bar Hiyya (1070 - 1130) Abraham, Max (1875 - 1922) Abu Kamil, Shuja (um 850 - um 930) Abu'l-Wafa al'Buzjani (940 - 998) Ackermann, Wilhelm (1896 - 1962) Adams, John Couch (5.6.1819 - 21.1.1892) Adams, John Frank (5.11.1930 - 7.1.1989) Adelard von Bath (1075 - 1160) Adler, August (1863 - 1923) Adrain, Robert (1775 - 1843)

25. (Biografía De Hiparco) Translate this page del Almagesto constituyeron las fuentes básicas del primer texto occidental deastronomía, el Tractatus de Sphaera de johannes de sacrobosco, un inglés de http://www.astrocosmo.cl/biografi/b-e_hiparco.htm

«Hiparco de Nicea» Nacido el año 194 aC., en Nicea, Bitinia, Asia Menor, Fallecido el año 120 aC., en Nicea, Bitinia, Asia Menor . HIPARCO fue el observador más grande de la antigüedad, tanto que su catálogo estelar, que contenía posiciones y brillos de unas 850 estrellas, fue superado en precisión solamente en el siglo XVI. Su escala de los brillos aparentes, que distingue seis magnitudes, está en la base de la actual clasificación fotométrica de las estrellas. Por otra parte, hizo el notable descubrimiento de la precesión de los equinoccios, es decir, del desplazamiento de los puntos equinocciales –puntos comunes a la eclíptica y al ecuador celeste- a lo largo de la eclíptica. Para ello, procedió a desarrollar un método que anteriormente había sido ideado por Aristarco; midió la distancia y tamaño de la Luna. Por otro lado, inventó la trigonometría esférica que incrementó el potencial del cálculo; renovó las matemáticas, herramienta esencial de la cosmología, astrofísica y astronomía, a la que perfeccionó con nuevos instrumentos. Conocedor de la distancia y de los movimientos de la Luna y en posesión de una teoría mejor que la de sus predecesores acerca de la órbita solar, Hiparco pudo conseguir satisfacer una de las principales exigencias de la astronomía antigua: la predicción de eclipses, cuestión que para los griegos, antes de Hiparco, constituía un serio problema, ya que tan sólo contaban para desarrollar sus predicciones sobre eclipses con el método del saros de los babilonios.

26. AIM25: University College London: De Sacro Bosco's 'De Sphera' And Other Tracts and in translation, to the modern period (eg The Sphere of sacrobosco and its Personalnames Sacro Bosco johannes de d 1244 or 1256 mathematician and http://www.aim25.ac.uk/cgi-bin/search2?coll_id=1612&inst_id=13

27. GULDIN - BIBLIOTHEK Translate this page 1544. II. 3978e. R1. sacrobosco, johannes de de sphaera. Alacalá. Eguia. 1526.II. 3978f. R1. sacrobosco, johannes de de sphaera. Paris. Colinaeus. 1538. III.3983. R1. http://www.kfunigraz.ac.at/ub/sosa/Guldin-bibliothek.htm

GULDIN - BIBLIOTHEK II Apian, Petrus: Introductio geographica Ingolstadt Apian Titelblatt: g Inscriptus Catalogo Biblioth. Mathem. Graecij 1739 Rückensignatur: P.G. 69 Weiterer Vorbesitzer: Sum Magistri Thomae Tohr ex Perchtoldtarff Austriaci Ao 1568 II Apian, Petrus: Quadrans Apiani Astronomius Ingolstadt Apian II Apian, Petrus: Horoscopium Apiani Ingolstadt Apian II Stöffler, Johannes: Calendarium Romanum magnum Oppenheim Koebel II Finé, Oronce: Arithmetica practica Paris Colinaeus Titelblatt: g Inscriptus Catalogo Bibl. Mathem. Graecij 1739 NEB Weiterer Vorbersitzer: Johannes Sambucus Lutetiae [15]60 II Paris Colinaeus II Finé, Oronce: De mundi sphaera Paris Colinaeus II Finé, Oronce: Quadrans astrolabicus Paris Colinaeus II Finè, Oronce: Quadratura circuli Paris Colinaeus II Sacrobosco, Johannes de: De sphaera Alacalá Eguia II Sacrobosco, Johannes de: De sphaera Paris Colinaeus III Kepler, Johannes: Astronomia nova aitiologetos, seu physica coelestis: tradita commentariis de motibus stellae Martis Prag Titelblatt: g Makulatureinband Rücken erneuert II EB Brahe, Tycho: Astronomia

28. Globusbibliographie Translate this page johannes de sacrobosco de sphaera mundi, in Lynn Thorndike The «Sphere»of sacrobosco and Its Commentators, Chicago 1949. Gossouin http://www.fortunecity.de/lindenpark/schwitters/149/globusbibliographie.html

web hosting domain names Online Einkaufen Mehr Sites Marcus Tullius Cicero: De Oratore, [III, 178-181] ed. Merklin, Stuttgart 21991 Manilius: Astronomia, [II, 749-771.], ed. Fels, Stuttgart 1990 Gaius Iulius Solinus: Collecteana rerum memorabilium, ed. Mommsen, [1895], Berlin 21958 Pomponius Mela: Kreuzfahrt durch die Alte Welt (= De Chorographia libri tres, deutsch), ed. Brodersen, Darmstadt 1994 Aurelius Augustinus: De Genesi ad litteram, in: id.: Opera omnia, III, (Patrologia Latina 34), Paris 1841 Anicius Manlius Severinus Boethius: De consolatione philosophiae, in: id.: The Theological Tractates, ed. Steward / Rand, London / Cambridge 1968 Macrobius Ambrosius Theodosius: Commentariorvm in somnivm Scipionis libri dvo, ed. Scarpa, Padova 1981 Martianus Capella: De nuptiis Mercurii et Philologiae, ed. Willis, Leipzig 1983. Magnus Aurelius Cassiodorus: De artibus ac disciplinis liberalium litterarum, in: Magnus Aurelius Cassiodorus: Opera omnia II, (= Patrologia Latina, LXX), Paris 1848, 1149-1220. Jornandus: De Getarum sive Gothiorum origine et rebus gestis, in: Magnus Aurelius Cassiodorus: Opera omnia, (= Patrologia Latina, LXIX), Paris 1848.

29. Globalisierung - Raumbewußtsein Und Erdkugelmodell Im Europäischen Mittelalter Translate this page Jahrhundert – von johannes de sacrobosco und Gossouin de Metz - und zeigen eineglobal gedachte Seefahrt und eine ebenso global gedachte Wanderung des http://www.fortunecity.de/lindenpark/schwitters/149/arenosus_globus.html

web hosting domain names Online Einkaufen Mehr Sites Sekr.: TEL 16-1 Ernst-Reuter-Platz 7 D-10587 Berlin e-mail: drkrakhf@sp.zrz.tu-berlin.de arenosus globus - Erdkugelvorstellungen in Literatur, Philosophie, Kunst, Musik und Kosmologie von Antike und Mittelalter bis zum 18. Jahrhundert - veranstaltet von der und dem Istituto Italiano di Cultura I. Globalisierung des Denkens im Mittelalter? III. Die kosmologischen Grundlagen des Globusmodells IV. Die Traditionsbildung und ihre Medien V. Die Neubewertung der Raumkonzeptionen in mittelalterlicher Kunst und Literatur I. Globalisierung des Denkens im Mittelalter? arenosus globus arenosus globus : Basilius von Caesarea, Ambrosius von Mailand, Aurelius Augustinus, Paulus Orosius. : Ampelius, Chalcidius, Macrobius, Martianus Capella, Boethius. : Cassiodor, Brunetto Latini. : Jornandes (oder Jordanes) von Ravenna, Isidor von Sevilla, Bischof Virgil von Salzburg, Adam von Bremen : Gerbert d’Aurillac (Papst Sylvester II), Enea Silvio Piccolomini (Papst Pius II). Theologen und Naturphilosophen : Snorri Sturluson, Marco Polo, Dante Alighieri, Brochard der Deutsche, Jean de Mandeville, Christine de Pizan, William Caxton, Martin Behaim, Christoph Columbus.

30. Malcolm Bull's Trivia Trail : Foldout Rastrick. He was also known as johannes de sacrobosco, John of theHoly Wood, John Holywood, John of Halifax, or John Halifax. He http://www.halifax-today.co.uk/specialfeatures/triviatrail/mms19.html

Johannes de Sancto Bosco Mathematician and astronomer born in Rastrick. He was also known as Johannes de Sacrobosco John of the Holy Wood John Holywood John of Halifax , or John Halifax He became a canon of the Order of St Augustine at the monastery of Holywood in Nithsdale. He promoted Arabic methods of arithmetic and algebra in his teachings, and in his De Algorismo , he discusses calculation with positive integers, with each of the 11 chapters dealing with topics such as addition, subtraction, multiplication, division, square roots and cube roots. He abridged The Almagest of Ptolemy In 1220, he wrote a book on astronomy entitled Tractatus de Sphaeri Mundi which deals with the shape and place of the Earth within a spherical universe, the various circles on the sky, the rising and setting of heavenly bodies from different geographical locations, and Ptolemy's theory of the planets and of eclipses. The book was used throughout Europe from the middle of the 13th century, and it was still the basic astronomy text until the 17th Century. In 1232, he wrote

31. Publikationen Fritz Krafft Artikel In Lexika Und Handbüchern Translate this page Parmenides, Peurbach, Piazzi, Pickering, Platon, Plinius, Poseidonios, Ptolemaios,Pythagoras, Riccioli, Romer, johannes de sacrobosco, Scheiner, Schiaparelli http://staff-www.uni-marburg.de/~krafft/artikel.htm

Stand: 16. November 2003) Bd 1, 1971, Sp. 526-527: Art (biologisch, Antike). Bd 3, 1974, Sp. 25-27: Gattung (biologisch, Antike); Sp. 1206-1212: Horror vacui. Bd 4, 1976, Sp. 1211-1226: Kreis und Kugel. Bd 5, 1980, Sp. 950-952: Mechanik (I, Antike). Bd 7, 1989, Sp. 402-403: Pflanzenseele (I, Antike). Bd 1, 1977-1980, Sp. 898 f.: Archimedes; Sp. 941 f.: Aristoteles (B III und IV); Sp. 1063-1065: artes mechanicae; Sp. 1174 f.: Atomistik. Bd 2, 1981, Sp.24-28: Bewegung. Bd 5, 1990, Sp. 598 f.: Johannes de Sacrobosco (Johannes 169). Bd 3, 1989, S. 295-296: Erxleben, Johann Christian Polykarp; S. 324 f.: Fabricius, David; S. 324 f.:Fabricius, Johannes. Bd 4, 1989, S. 418 f.: Guericke, Otto von. Bd 5, 1990, S. 291 f.: Hevelius, Johannes. Bd 6, 1990, S. 281-284: Kepler, Johannes; S. 347 f.: Klaproth, Martin Heinrich; S. 491-493: Kopernikus, Nikolaus. Bd 9, 1991, S. 23 f.: Ostwald, Wilhelm; S. 197: Poggendorff, Johann Christian; S. 334-336: Regiomontanus, Johannes; S. 433 f.: Richter, Jeremias Benjamin; S. 466: Riese, Adam. Bd 10, 1991, S. 46: Rothmann, Christoph; S. 183 f.: Scheiner, Christoph.

32. Bruno, Giordano (1548-1600) johannes de sacrobosco (1195-1256 http://www.eresie.it/id564.htm

var TlxPgNm='id564'; Bruno, Giordano (1548-1600) Giordano Bruno Dizionario di eresie, eretici, dissidenti religiosi, confessioni cristiane non cattoliche, nuovi movimenti religiosi di ispirazione cristiana H ome E lenco alfabetico ... eriodi storici Bruno, Giordano (1548-1600) professo off-limits per un convento, come Raimondo Lullo (1235-1315), testi di cabala Erasmo da Rotterdam , con il quale condivise la critica alla Chiesa cattolica. B. abbandona la tonaca All'inizio del 1576 la crisi: trascinato in un violento battibecco con un confratello, B. venne accusato di arianesimo e di antitrinitarismo De' segni de' tempi B. a Ginevra Galeazzo Caracciolo calvinista establishment B. in Francia A Tolosa B. rimase per circa venti mesi, divenendo lettore pubblico di filosofia e scrivendo un commento al Tractatus de sphaera mundi dell'astronomo agostiniano Johannes de Sacrobosco (1195-1256), ma fu costretto nel 1581 a lasciare Tolosa a causa della guerra civile tra cattolici e ugonotti De umbris idearum , un testo di arte mnemotecnica, ispirata alle dottrine del francescano Raimondo Lullo (1235-1315). Il periodo molto favorevole per B. gli permise di poter scrivere e pubblicare diversi altri trattati di mnemotecnica, come Cantus circaeus e De compendiosa architectura et complemento artis Lullii , oltre alla commedia in lingua italiana Il candelaio B. in Inghilterra

33. Dizionario Di Eresie, Eretici, Dissidenti Religiosi, Confessioni Translate this page S. Sabbatarianismo. Sabellianesimo. Sabellio. sacrobosco, johannes de. SacroMacello in Valtellina. Sadoleto, Jacopo. Sagarelli, Gherardo. Sagramentari. http://www.eresie.it/id35.htm

var TlxPgNm='id35'; S Dizionario di eresie, eretici, dissidenti religiosi, confessioni cristiane non cattoliche, nuovi movimenti religiosi di ispirazione cristiana H ome E lenco alfabetico ... eriodi storici S Sabbatarianismo Sabellianesimo Sabellio Sacrobosco, Johannes de ... Symmonds, Martha

34. Biblioteca Histórica Marqués De Valdecilla De La UCM Translate this page 500 AÑOS de LA BULA CISNERIANA. johannes de sacrobosco Opusculum de spheramundi cum additionibus et familiarissimo comentario Petri Ciruelli http://www.ucm.es/BUCM/foa/500UCM/pagina/johannes42.htm

500 AÑOS DE LA BULA CISNERIANA Johannes de Sacrobosco: Opusculum de sphera mundi... cum additionibus et familiarissimo comentario Petri Ciruelli [In alma Complutensi Universitate, Michael de Eguia, 1526. Fol. (28,5x21 cm.). Fol. LXXIII v.: colofón (BUC, FLL Res.1133 Biblioteca de la UCM

35. Sánchez Mariana Translate this page adelante, al comienzo del Tratado de la Esfera, la podemos encontrar un año antesen la edición de la Sphaera mundi de johannes de sacrobosco (Paris, Guy http://www.ucm.es/BUCM/diosc/compost.htm

COMPOST ET KALENDRIER DES BERGÈRES INTRODUCCIÓN por Manuel Sánchez Mariana, Director del Fondo Histórico, Bibliográfico y Documental de la Biblioteca Compost et kalendrier des bergères . Paris, Guy Marchant, 17 agosto 1499. - Fol. 68 h., lin. tir. y 2 col., 40 lín., 211x127 mm. - Min. p. inic. - 70 grab. xilogr. Sign.: a , b , c , d , e , f , g , h , i , k Tipos: 107 B (en texto); 200 G (en títulos); 74 G (en textos de los grab.). H.C. 5590=H. 5586 Pell. 3910 GW. 5915 BMC. VIII, 67. Goff C-58 Ej.: Erlangen, Universitätsbibliothek (incompl.). Kolmar, Stadtbibliothek . London, British Library (incompl.). Paris, Bibl. Nat. (2 ej., uno incompl.). 1. La edición Se trata del único ejemplar de esta publicación que sepamos que existe en España, y afortunadamente se nos ha conservado completo. Esta rara edición -de la que el Gesamtkatalog der Wiegendrucke (VI, col. 61-62) recoge cinco ejemplares pero solo dos de ellos completos (a los que habría que añadir el de la Biblioteca de la Universidad Complutense)- del "Calendario de las Pastoras", viene a ser una continuación o complemento del Calendrier des Bergiers , impreso por primera vez en 1491 por el propio Guy Marchant y que sin duda fue un éxito editorial, pues se hicieron de él nada menos que unas diez ediciones antes de finalizar el siglo; del "de las Pastoras", sin embargo, no conocemos más edición que la aquí reseñada. Que trataba de ser una continuación o complemento del anterior se dice en la primera página de la publicación: "... nouvellement composé sans contredire a celluy

36. History Of Astronomy: Persons (J) johannes de sacrobosco de Sacro Bosco; John of Holywood (c.11951256)Short biography and references (MacTutor Hist. Math.); Short http://www.astro.uni-bonn.de/~pbrosche/persons/pers_j.html

History of Astronomy Persons History of Astronomy: Persons (J) Deutsche Fassung Jabir ibn Aflah [Gabir ben Aflah; Geber Hispalensis], al-Ishbili Abu Muhammad (c.1100-c.1160) Short biography, references and links (MacTutor Hist. Math.) Jabir Ibn Haiyan (?-803): see Ibn Haiyan Jacobi, Carl Gustav Jacob (1804-1851) Short biography and references (MacTutor Hist. Math.) Short biography (Eric Weisstein's Treasure Trove) Biography (23 Apr 1996: still under construction) Paper by C. G. J. Jacobi from Astronomische Nachrichten Links to WWW sources Jaeger, John Conrad (1907-1979) Biography Very short biography, references, archival sources and links Biographical data and bibliography Jansky, Karl Guthe (1905-1950) Short biography and references (Eric Weisstein's Treasure Trove) Short biography Very short biography Very short biography (Eric Weisstein's Treasure Trove) Very short biography Very short biography Jaschek, Walter (1912-1980) Jaschek and the Kuffner Observatory Jaschek und die Kuffner-Sternwarte (in German) Jastrow, Robert (b. 1925)

37. History Of Astronomy: What's New At This Site On March 17, 1999 The Solar Tower. Persons. J johannes de sacrobosco de Sacro Bosco;John of Holywood (c.11951256) Short biography and references. http://www.astro.uni-bonn.de/~pbrosche/new/new990317.html

History of Astronomy What's new History of Astronomy: What's new at this site on March 17, 1999 Some URLs have been updated. Welcome / About Site map (complete Table of Contents) updated Citation Index updated Acknowledgements updated History of astronomy Observatories and other places Georgia (Georgien) The unknown history of Georgian astronomy , by Irakli Simonia , Germany The Solar Tower Persons J Johannes de Sacrobosco [de Sacro Bosco; John of Holywood] (c.1195-1256) Short biography and references K Kepler, Johannes Very short biography and references ... Neues vom Keplerschen Kugelproblem? , von Michael Gebel (in German) Britannica Online entries Bibliography (ADS entries) References (ADS entries) References (Commission for the Publication of the Works of Johannes Kepler) UCSC astronomer discovers 400-year-old manuscript , by Barbara McKenna Horoscope authored by Kepler. M Mercator, Gerardus [Kremer, Gerhard] (1512-1594) Mercator-Feier 1962 im Mercator-Gymnasium (in German) With a short biography.

38. Slide #261 Monograph TITLE Tractatus de Sphaera Mundi DATE 13001500 AUTHOR johannes de sacroboscoJohn Halifax of Holywood deSCRIPTION A fitting end to this volume, this map http://www.henry-davis.com/MAPS/LMwebpages/261mono.html

Slide #261 TITLE: Tractatus de Sphaera Mundi DATE: AUTHOR: Johannes de Sacrobosco [John Halifax of Holywood] DESCRIPTION: A fitting end to this volume, this map is from a treatise that is often cited as atypical of the medieval period because it is derived entirely from the writings of earlier scholars, leaning especially on Ptolemy's astronomical work the Almagest. However, even without the addition of the new discoveries, it achieved a great popularity that lasted well through the Renaissance, for after the invention of printing no fewer than 65 editions succeeded each other in rapid order and occupied the attentions of the foremost scientific printers of the time. Its popularity may be explained not only by its dependence on established authority, but on its slight bulk and the simplicity to which elaborate theories were reduced. Its four chapters deal with the terrestrial globe, circles, the movements of the stars and with the planets. It was doubtless this brevity which recommended it to seafaring folk, for it was known to have been one of the standard text books of the Portuguese seamen during their great age of exploration. Johannes de Sacrobosco, latinized for John Halifax of Holywood, a teacher of mathematics and astronomy at the University of Paris during the 13th century. He was probably from Yorkshire, England, educated at Oxford, and migrated to Paris in 1221, where he compiled his

39. Index Of Late Medieval Maps 261, Tractatus de Sphaera Mundi, johannes de sacrobosco, 13001500.261A, Tractatus de Sphaera Mundi, johannes de sacrobosco, 1300-1500. http://www.henry-davis.com/MAPS/LMwebpages/LML.html

Index of Cartographic Images Illustrating Maps of the Late Medieval Period 1300 - 1500 A.D. Time Chart of Medieval Cartography Slide # Title: Cartographer: Date: The Countries of the Southwestern Sea Chu Ssu-Pen/Lo Hung-hsien Chinese Map Legend Chu-Ssu-Pen and Lo Hung-hsien 227.A The Countries of the Southwestern Sea Southern Africa Chu Ssu-Pen/Lo Hung-hsien The General Map of China Chu-Ssu-Pen and Lo Hung-hsien The General Map of China Chu-Ssu-Pen and Lo Hung-hsien Hsi-Pei Pi Ti-Li T'u Chu Ssu-Pen Hsi-Pei Pi Ti-Li T'u Chu Ssu-Pen Hsi-Pei Pi Ti-Li T'u Chu Ssu-Pen Vesconte world map Pietro Vesconte Vesconte world map Pietro Vesconte ca. 1320 Vesconte world map Pietro Vesconte Vesconte world map Pietro Vesconte Vesconte world map Pietro Vesconte Vesconte world map (re-oriented with North at the top) Pietro Vesconte Vesconte world map Pietro Vesconte World Map from Marino Sanudo's Liber secretorum fidelium crucis Pietro Vesconte ca. 1321 Vesconte world map, detail, Europe Pietro Vesconte World Map from Marino Sanudo's Liber secretorum fidelium crucis Pietro Vesconte ca. 1321

40. Ailly sacrobosco, johannes de Sphaera Mundi Venice Bonetus Locatellus for OctavianusScotus 1490 An assembly of these basic texts of preCopernican astronomy http://www.stephan-selle.de/Buchgarten/Kolumbus/Karten/Ailly/ailly.html

Pierre ist Theologe und Kardinal, 1351 in Compiegne geboren, 1420 in Avignon gestorben. Er ist unter anderem der führende Kopf beim Konstanzer Konzil (1414 - 1418) und half dabei, Hus zu braten.Sein Imago Mundi ist von 1410. Unten eine Seite aus dem Werk mit einigen der 898 Anmerkungen von Kolumbus “Ailly 'was a good popularizer of Ptolemaic astronomy, chiefly in the form of a commentary on the Sphaera mundi of Sacrobosco” “SACROBOSCO, Johannes de Sphaera Mundi Venice Bonetus Locatellus for Octavianus Scotus 1490 An assembly of these basic texts of pre-Copernican astronomy, first published together as above in 1482. The De sphaera mundi (editio princeps 1472) was the first printed astronomical book, and a fundamental text of medieval and post-medieval astronomy. It is a synthesis of Ptolemy and his Arabic commentators, presenting an elegant, accessible Ptolemaic cosmology, and for this reason was adopted as the most authoritative astronomical textbook of its time. “ Als Zeitgenosse des “Großen Schismas” musste auch P. sich zeitweise mit drei gleichzeitig amtierenden Päpsten herumschlagen, kein Wunder also, dass er von einem großen religiösen Wechsel träumt (bzw. ihn vorhersagt: er ist auch

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