A new Q&A session is now open. I look forward to answering your questions concerning classical astrologies, whether historical, theoretical, or practical, including actual horoscopic examples. www.patreon.com/posts/q-apri...

Conference on the origins of the Zodiac in Berlin Marius Gerhardt (ÄMP) „Schicksal in den Sternen – die Anfänge des Tierkreises“ Thursday 7 April 2026, 18:15–19:00

I’ve posted the March digest of the HOROI Project. It summarizes ongoing translation work (Theophilus, Dorotheus, Rhetorius) and situates HOROI Talk #20 within the broader development of the project, with a brief outlook for April. www.patreon.com/posts/monthl...

HOROI Talk #20: The Elemental Qualities and the Subdivisions of the Zodiac concludes the first series w/ an examination of the seasonal quarters, signs, decan, monomoiria, etc., also in light of their elemental qualities and planetary association. March 29, 4 pm UTC. www.patreon.com/posts/elemen...

I’ve posted the February digest. It summarizes new translation work (Theophilus, Dorotheus, Rhetorius, Abū Maʿshar), reflects on a negative result regarding supposed Dorothean material, and outlines the March plans, including a talk on zodiac and sign divisions. www.patreon.com/posts/monthl...

The regular Q&A session is open until Friday. Any questions, including requests for second opinions and direct readings, are welcome. www.patreon.com/posts/q-febr...

The January digest of HOROI Project is now available. You'll find the highlights of the new translations (Rhetorius/Dorotheus, Valens, Abū Maʿshar), a summary of HOROI Talk #19 on the development of planetary significations, and what is expected in February. www.patreon.com/posts/monthl...

The historical development of the astrological understanding of the planets is a long story. I've attempted to cover all its important aspects in HOROI Talk #19, a massive 4-hour lecture spanning from 3000 BCE to the present day. I hope you'll like it! www.patreon.com/posts/wild-s...

A HOROI Talk dedicated to the planets? See you on January 25!

Maybe the zillionth translation, but I’m still happy I’ve done it www.patreon.com/posts/valens...

Elemental theory is really a Procrustean bed for the planets

It took a bit more time than I’d expected, but Dorotheus’s nativities exemplifying success and failure as preserved in Māshāʾallāh’s surviving version are now available as the first installment of Rhetorius, Part V. www.patreon.com/posts/explan...

I’ve posted the December digest of the HOROI Project. Rather than merely summarizing results, it focuses on points where manuscript comparison raises methodological questions that could affect previously completed work. www.patreon.com/posts/monthl...

November in retrospect: - horary astro from Abū Maʿshar, 1st transcribed/translated - Theophilus’s weather predictions from mss transcribed for the 1st time - place division & longevity stuff from Rhetorius, party brand new - a talk about the Moon’s roles in Hellenistic natal astro

HOROI Talk #17 focused on the Moon’s roles in various astrological traditions, except in Hellenistic natal astrology, a substantial subject in its own right. This very topic will be explored in HOROI Talk #18, scheduled for November 30. 1/3

Arguably, the Moon is the most important planet in most types of astrology. In the next HOROI Talk, “The Tales of the Moon,” I will cover the uses and historical development of lunar concepts and conditions. Due to the abundance of relevant material, this talk is split into two parts.

Significations of planets and other goodies from Abū Maʿshar, the survival and adoption of infants discussed by Rhetorius, natal and electional uses of some lunar mansions… these are only the texts translated for the first time.

Important forthcoming volume. Astrologers at Work: Essays on the Practices and Techniques of Astrology in Memory of Helena Avelar. brill.com/display/titl...

Coming soon: "Astrologers at Work brings together fourteen scholars to explore the history of astrological practice, focusing on techniques, doctrines, and methods of interpretation across cultures and centuries." brill.com/display/titl...

In July, new translations from Abū Maʿshar, Dorotheus, Rhetorius, and Theophilus were produced. Find the monthly digest with a retrospect and the plans for August here: www.patreon.com/posts/monthl...

“If Mercury and Venus are in fall in their own or each other’s terms, they make imitators or politicians, especially in Capricorn due to the Ape’s co-rising.” (Rhetorius)

Please accept my invitation to HOROI Talk #16, scheduled for Sunday, June 22, at 4 pm GMT.

Service announcement I learned that Kai Rui Ltd. is attempting to register the domain horoiproject.cn and its various permutations, clearly for scamming purposes. In the event that they succeed in doing so...

Looks fascinating www.sup.org/books/middle...

Together with uploading my most recent talk about the zodiac, a previous talk discussing “decennials” has been made public www.patreon.com/posts/decenn...

Picked up a copy of this @caelien.bsky.social Review I wrote a piece in about the privilege of new astrologies 🥰

For fun, I asked ChatGPT to compile a list of celestial bodies — both within and beyond the Solar System — ranked by the gravitational influence they exert on Earth. The list is sorted in descending order using the base-10 logarithm of the maximum/minimum gravitational force.

New HOROI Talk on May 25 www.patreon.com/posts/zodiac...

The most substantial extant version of Dorotheus’s influential but largely lost astrological poem is the Arabic text known as “Carmen astrologicum.” But this version, apart from spurious additions, omits several sections and details of the genuine poem.

Do you know what Dorotheus wrote about activity/profession?

Translating the only remaining small chapter from Pseudo-Porphyry’s Introduction gave me the opportunity to append some other texts, related in various ways, on the planets. This goes under open access. Enjoy! www.patreon.com/posts/colors...

It’s the end of March. Time to publish the monthly digest of HOROI Project! www.patreon.com/posts/125598...

February is over, and so are the translations of Rhetorius’s and Theophilus’s chapters on the twelve places. For more information, follow the link to the monthly digest: www.patreon.com/posts/monthl...

HOROI Talk #9 about the Mesopotamian origins of exaltations is now publicly available www.patreon.com/posts/exalta...

Join me for the upcoming HOROI Talk on February 23, Sunday, at 5 pm GMT. Titled “Whole Lotta Lots,” this talk of about 90 to 120 minutes will focus on the lots (klēroi, aka “Arabic parts”): their historical development as much as it can be reconstructed, their logic, and use.

Rhetorius's giant chapter on the twelve places is done www.patreon.com/posts/explan...

January’s flagship text was some previously unedited/untranslated Abū Maʿshar on the vernal ingresses and the eclipses. It’s now open-access, so why not check it? www.patreon.com/posts/book-i...

HOROI Talk #8, titled "Support and Obstruction in Configurations," is now publicly available: www.patreon.com/posts/100236...

Join me for HOROI Talk #13 on Sunday, January 26, at 5 pm GMT. Titled “Fixed Stars and Asterisms,” this talk will be devoted primarily to the titular subject... [1/3]