Tetrabiblos

The Tetrabiblos is a foundational text in astrology, written by the ancient Greek scholar Claudius Ptolemy in the 2nd century AD. It synthesizes earlier astrological knowledge and outlines principles of how celestial bodies influence human affairs. The work covers topics like the significance of the zodiac, planetary movements, and how these factors can be interpreted to understand personality traits and predict events. Highly influential in both the ancient and medieval worlds, the Tetrabiblos established many astrological concepts still referenced today. Its name means "Four Books," referring to its structure, which divides the topics into four distinct sections.