Treatise on Astronomy
Ramon Lull
Ramon Lull (circa 1232-1316), a key figure in medieval literature, was a multifaceted personality who pursued literature, philosophy, theology, and the natural sciences with passion and skill. His Treatise on Astronomy interprets the art of astrology as an abstract logic wherein delineation is at least partly reduced to a calculus of manipulating and combining letters. By this approach, Lull achieves surprisingly elegant derivations of planetary combinations, and planet/sign combinations, with a specific focus on the nature and order of the elemental triplicities. This is a facsimile edition.