The Library · Medieval tradition

Part I: On the Division of the Orb of the Signs and their Being¹

A chapter of Liber Astronomiae (Treatises 1 & 2.1) by Guido Bonatti, c. 1277 CE.

The fundamentals: signs, houses, planets, aspects. Treatise 1 introduces astrology's defence; Treatise 2 covers planet-in-sign and house cusps.

The full chapter text renders in the interactive Library reader, with the engine's cited rules linked to the passages they derive from.