Tetrabiblos of Ptolemy - The earliest surviving astrology textbook!
Opening page of Tetrabiblos : 15th-century Latin reproduction of the 12th-century translation of Plato of Tivoli ; published in Venice by Erhard Ratdolt , 1484. Tetrabiblos (Τετράβιβλος) 'four books', also known in Greek as Apotelesmatiká (Ἀποτελεσματικά) 'effects', and in Latin as Quadripartitum 'four parts', is a text on the philosophy and practice of astrology, written in the 2nd century AD by the Alexandrian scholar Claudius Ptolemy (c. AD 90–c. AD 168.