Ptolemy's Tetrabiblos, Or Quadripartite May 2026

: This book focuses on events affecting entire regions or nations. It explores how celestial phenomena like eclipses and comets influence wars, famines, and the weather.

: Ptolemy defends astrology as a legitimate, though less certain, science compared to astronomy. He introduces the "powers" of the planets based on physical qualities—such as heat, moisture, dryness, and cold—and describes the nature of the zodiac signs. Ptolemy's Tetrabiblos, Or Quadripartite

: Here, Ptolemy moves to the individual, discussing factors present at birth that determine physical appearance, temperament, and parental influence. : This book focuses on events affecting entire

For over a thousand years, the Tetrabiblos held an authority in the astrological world comparable to that of a bible. though less certain