Title: Sphaera Ioannis A Sacrobosco: Emendata, Avcta Et Illustrata, 1610
Author: Johannes de Sacrobosco; Christoph Clavius; Francesco Giuntini; Albertus Hero
Publisher: Colonia Agrippinae, Apud Petrum Cholinum
An early 17th century edition of Johannes de Sacrobosco's famed work, De Sphaera Mundi. Known otherwise as On the Sphere of the World, this work serves as a medieval introduction to the basic elements of astronomy, originally written about 1230 CE. Heavily influenced by Ptolemy’s Almagest and utilizing additional ideas from Islamic astronomy, the work served as one of the most influential works of pre-Copernican astronomy in Europe. With its popularity, the Spaera witnessed over 200 various editions up to the 17th century.
There are roughly 87 woodcut illustrations and diagrams throughout.
This volume has been rebound using a medieval manuscript fragment of the early 15th or late 14th century.
One manuscript bound volume in 12mo, 258 (but actually 238 of 256) pages
On note of condition, this volume is in poor shape, with the front cover curling, and text block detached from the spine and front, though holding at the rear cover. There is some old staining and several holes to the binding. The gatherings of up to page 80 is detached from the main text block, and the rest are all holding onto each other by several cords at the top. The last 18 pages are lacking, as is a folding plate. There is some foxing and toning throughout.