De sphaera mundi
From Freepedia
De sphaera mundi (Latin meaning Of the Spheres of Worlds, sometimes rendered The Sphere of the Cosmos; the Latin title is also given as Tractatus de sphaera, or simply De sphaera) is a medieval astronomy textbook written by Johannes de Sacrobosco c. 1230. Based heavily on Ptolemy’s Almagest, and drawing additional ideas from Arab astronomers, it was one of the most influential works of pre-Copernican astronomy in Europe.
De sphaera mundi was used in universities for hundreds of years and the manuscript copied many times before the invention of the printing press. The first printed edition appeared in 1472 in Ferrara, and many more editions were printed over the next two hundred years. The work was frequently supplemented with commentaries on the original text.
