25. Denis Foulechat, Translation of John of Salisbury's Policraticus, Paris, 14th century, Manuscripts
Department, Western Section, Fr. 24287, Parchment 

In 1372, Charles V (1364-1380) had Foulechat translate Policraticus, an 
important medieval text about political theory which projected a theocratic 
vision of the State and posed the question of  monarchical legitimacy and 
tyrannicide. This illustration depicts the wise king Charles V seated on a
chair from which justice was meted out and pointing to the manuscript 
placed on a bookwheel. He is
the very picture of the learned and just king blessed by the hand of God.

( Treasures from the Bibliothèque nationale de France)
http://lcweb.loc.gov/exhibits/bnf/bnf0003.html
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 Ptolemy, Almagest 

 In Latin, Translated by Gerard of Cremona, Thirteenth century 

The most important medieval Latin translation of the "Almagest," which is 
found in many manuscripts, was made from the Arabic in Spain in 1175 by 
Gerard of Cremona, the most prolific of all medieval translators from Arabic 
into Latin. These pages show Book X Chapters 6-7, Ptolemy's description of 
his kinematic model for the motion of the superior
planets--Mars, Jupiter, and Saturn. The 
separation of the center of uniform motion from the
center of uniform distance of the center 
of the epicycle is explained, as well as the beginning
of the derivation of the elements of the 
model for Mars, through a lengthy iterative
computation. The earth is at rest at (e) 
and the planets move uniformly with respect to a point
(r) which is separated from the center of 
their spheres, (d). This device closely approximated
the elliptical orbit in which planets actually move. 

Vat. lat. 2057 fols. 70 verso-71 recto, fols. 146 verso - 147 recto 
math11a NS.10 

http://sunsite.unc.edu/expo/vatican.exhibit/exhibit/d-mathematics

Note: This hypertext Library contains inlined images in GIF format. The tiny pictures you see in the
text are links to full size JPEG equivalents (each are 100-400 Kb apiece). 

The original data was copied by FTP from ftp.loc.gov. Questions or comments about the online
exhibit should be directed to the Library of Congress World Wide Web Team (lcweb@loc.gov). 

           wishes to thank Frans van Hoesel (hoesel@chem.rug.nl) who created the hypermedia
interface for this exhibit and Marc Andreessen (marca@ncsa.uiuc.edu) for the corrections he made
to this exhibit. John Ockerbloom (ockerbloom@cs.cmu.edu) kindly donated a few pages of hypertext.



The text and images in the Online Exhibit ROME REBORN: THE VATICAN LIBRARY
AND RENAISSANCE CULTURE are for the personal use of students, scholars, and the
public. Any commercial use or publication of them is strictly prohibited. 




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