The Library · Hellenistic tradition
A chapter of Carmen Astrologicum by Dorotheus of Sidon, c. 75 CE.
The earliest surviving Hellenistic textbook. Foundational for medieval Arabic astrology — the source for trigon lords, planetary periods, and elections doctrine.
The full chapter text renders in the interactive Library reader, with the engine's cited rules linked to the passages they derive from.
The whole book · The rule book · The Library