Description

TETRABIBLOS

The Four Books of the Judgments of the Stars

Claudius Ptolemy
Astronaming Edition – 2026

A foundational masterpiece of Western astrology, the Tetrabiblos of Claudius Ptolemy stands as one of the most influential texts of the ancient astrological tradition.

Written in the 2nd century CE, this monumental work establishes the theoretical and methodological foundations of learned astrology: the nature of the planets, the signs of the zodiac, the celestial houses, aspects, determinations, and the principles of astrological judgments.

More than a mere treatise, the Tetrabiblos is a philosophical work that seeks to reconcile astronomical observation, natural causality, and the art of prediction.

Why read the Tetrabiblos today?

Because it is:

• The foundational text of classical astrology

• The source of medieval and Renaissance astrological doctrines

• A structuring work for understanding traditional astrology

• An essential reference for any serious student of astrology

What you will find in this work:

• The principles of celestial influences

• The theory of planetary qualities

• The foundations of astrological prediction

• The distinction between astronomical certainty and astrological conjecture

• A philosophical reflection on the limits of prediction

An Astronaming Edition

This digital edition offers:

• A clear and structured layout

• A faithful reproduction of the text

• A presentation adapted to contemporary readers

• A rediscovery of a timeless classic

The Tetrabiblos is not a simplified manual of modern horoscope writing.
It is a foundational text, dense, rigorous, and profoundly philosophical.

For enthusiasts of traditional astrology, the history of science, and ancient thought, this work remains essential reading.