The rare first edition. Printed in two columns. Vignette of a sphere on the title page. 14 in-text figures and diagrams and numerous tables, notably a calendar of the position of the stars and zodiac figures, tables of latitudes and longitudes.
Contemporary limp vellum binding with flaps. Smooth spine unlettered. Traces of ties. Split to upper joint at head over two centimeters. Various stains. Lacking the first endleaf before the title. Lower right corner of title page missing. Brown stain to lower right corner from leaf 14 to leaf 32.
Commentary by Georg Henisch on the treatise of the sphere by Proclus, the celebrated Neo-Platonic philosopher of the 5th century. The first part is a Latin translation, with the Greek text on the left, of the treatise of the sphere. This astronomical treatise follows Ptolemy's system and studies the theory of the five climatic zones, seeking to clearly explain astronomical phenomena.