The Esoteric and the State in Ancient Rome, Part 2: The State and the Stars
Astrology is often seen as a key component of western esotericism. This it may be, but this does not mean it has been a peripheral or ‘fringe’ pursuit in western history! In this episode we look at the rise of astrology in Rome, firstly in the Roman lower classes in the republican period, then in...
Primary Sources
Greek astrological and divinatory texts (Cambridge, Trinity College, MS R.15.36)
Cambridge MS R.15.36 is a remarkable artifact that bridges the gap between pagan antiquity and Christian Byzantium, presenting a world where 'The Great Pythagoras' and Saint Leo the Wise are cited with equal authority. By blending Hellenistic astrological houses with Christian liturgy and Pythagorea
Pal.lat.1369
Pal.lat.1369 functions as both a master manual for astronomical construction and a textbook for the application of planetary influence on human life. It argues that the universe operates on rigid geometric principles that can be captured within the brass and parchment of an instrument. The text move
Astronomical and Magical Compendium
This compendium treats the universe as a complex clockwork mechanism waiting for the observer to master its controls. By uniting technical manuals on sundial and quadrant construction with deep dives into judicial astrology, the text teaches how to read the heavens for practical gain. It rejects the
Astronomicon
Marcus Manilius’s Astronomicon is a breathtaking synthesis of technical science, Stoic philosophy, and epic poetry that challenges the reader to 'scale the heavens' and find the divine within. Writing at the dawn of the Roman Empire, Manilius dismisses the tired tropes of kings and wars to map the '
Libellus Isagogicus ad Magisterium Iudiciorum Astrorum
This manual serves as the primary gateway for understanding how the heavens dictate sublunary events. Alcabitius moves past simple interpretation to offer a rigorous, mathematical system for judging nativities and timing future outcomes. He treats the cosmos as a coherent machine where every degree
Tetrabiblos
The Tetrabiblos is not merely a book of horoscopes; it is a monumental attempt by the father of geography and astronomy to rationalize celestial influence through the lens of Aristotelian natural philosophy. Ptolemy argues that the stars exert a physical 'temperament' upon the world, governing every
Tetrabiblos and Centiloquy
Claudius Ptolemy’s Quadripartitum, enriched by Hali’s classic commentary, stands as the most influential defense of astrology as a legitimate branch of natural philosophy. Rather than mere superstition, Ptolemy presents astrology as a rigorous study of physical influence, where the four qualities—he
On the Judgments of the Stars
De Judiciis Astrorum stands as a monumental bridge between the Islamic Golden Age and the European Renaissance, offering a comprehensive system for decoding the influence of the heavens. Originally composed in Arabic and translated under the royal patronage of King Alfonso of Castile, this text make
On the Judgments of the Stars
Libri de Iudiciis Astrorum is more than a manual of astrology; it is a bold Renaissance manifesto for the restoration of ancient scientific truth. Edited by the humanist Antonius Stupa, the text seeks to 'purify' the wisdom of the 11th-century Arabic master Ali ibn Abi al-Rijal, stripping away what
Alchabitius with Commentary
The 'Libellus isagogicus' stands as an essential bridge between the sophisticated traditions of Islamic astrology and the Latin West, offering a rigorously structured guide to the 'magisterium of the judgments of the stars.' Alchabitius rejects the 'excessive wordiness' of his predecessors to delive
The Book of Nativities and the Centiloquy of Hermes
Liber Nativitatum et Centiloquium Divi Hermetis stands as a monumental synthesis of Hermetic wisdom and Arabic astrological precision, asserting that the moment of birth is an inescapable map of a person's entire existence. By blending medical iatromathematics with social predestination, Albubather
Compilatio de Astrorum Scientia
This text defines the science of the stars as a practical tool for survival. Leopold of Austria argues that humans must study celestial motions to harness their effects, comparing the ignorant to those who plant seeds but never harvest. He treats the universe as a physical machine, governed by geome
Tetrabiblos (Quadripartitum)
Books of Astronomy (Firmicus, Manilius, Aratus)
Firmicus Maternus and his peers treat astrology not as superstition but as a rigorous, divine science. The text argues that the human soul remains trapped in a mortal body that responds to the precise movements of the Moon and planets. It provides specific, technical instructions for calculating lif
Eight Books on Astrology
The 'Mathesis' of Firmicus Maternus is more than a manual; it is an unflinching attempt to synthesize the entire astrological tradition of the ancient world into a singular, divine science. Writing during the reign of Constantine, Maternus offers a unique perspective as a former public advocate who
Elements and Principles of Astronomy
Richard Roussat’s 'Elements and Principles of Astronomy' is an extraordinary bridge between medieval esoteric tradition and Renaissance practical inquiry. More than a technical manual, it is a defensive and deeply opinionated guide to 'astronomical secrets' translated into the vernacular for the 'vi
Commentary on Ptolemy's Judgments of the Stars
Cardano argues that the horoscope is not a mere collection of symbols but a causal mechanism that shapes the human experience. He rejects the common practice of interrogational astrology as a deceptive parlor trick unworthy of a serious scholar. By meticulously annotating Ptolemy, he bridges the gap
Astronomicon Libri VIII (Firmicus, Ptolemy, Hermes, Mashallah, Omar, Zahel, Manilius)
Astronomica
Marcus Manilius’s Astronomica, particularly in this definitive edition by Joseph Scaliger, offers a unique window into the early 1st-century AD Roman understanding of the cosmos. Far from mere superstition, the text presents a rigorous, technical system where the universe is a rational organism gove
Aphoristic Astrology of Ptolemy, Hermes, and Others
This 1641 Latin compilation serves as a monumental crossroads for Western esoteric thought, systematically organizing the aphoristic wisdom of astrology’s most legendary figures. By blending the mathematical rigor of Girolamo Cardano with the foundational philosophy of Ptolemy’s Centiloquium, the te
French Astrology (Astrologia Gallica)
Jean-Baptiste Morin’s 'Astrologia Gallica' is far more than a simple manual; it is the culmination of a lifetime dedicated to elevating astrology to a disciplined, rational science. As a renowned mathematician and physician, Morin sought to strip away medieval superstition in favor of a robust, syst