by Klaúdios Ptolemaîos
Type: Tractatus on Philosophy
Quality: 11 (Base 8; +1 Skilled illuminator, +1 Skilled scribe, +1 Skilled binder)
Belongs to: Treverorum
The Tetrabiblos is the Latin translation of the original Greek Apotelesmatika, a text on Astrology via an unknown Arabic source. The Tetrabiblos is an extensive and continually reprinted treatise on the ancient principles of horoscopic astrology in four books (Greek tetra means “four”, biblos is “book”). That it did not quite attain the unrivaled status of the Almagest was perhaps because it did not cover some popular areas of the subject, particularly electional astrology (interpreting astrological charts for a particular moment to determine the outcome of a course of action to be initiated at that time,) and medical astrology.