HOROI Project
@horoiproject.bsky.social
Dr. Levente László’s crowdfunded project: research on Hellenistic and Byzantine astrological texts and producing English translations
A HOROI Talk dedicated to the planets? See you on January 25!
January 19, 2026 at 5:14 PM
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...
www.patreon.com/posts/valens...
Valens on the nature of the planets | HOROI Project
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January 16, 2026 at 4:22 PM
Maybe the zillionth translation, but I’m still happy I’ve done it
www.patreon.com/posts/valens...
www.patreon.com/posts/valens...
Elemental theory is really a Procrustean bed for the planets
January 14, 2026 at 11:56 AM
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...
www.patreon.com/posts/explan...
An Explanation and Interpretation of All Astrology – V.1–7 | HOROI Project
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January 12, 2026 at 2:47 PM
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...
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...
www.patreon.com/posts/monthl...
Monthly Digest, December 2025 | HOROI Project
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December 31, 2025 at 3:20 PM
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...
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
- 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
Monthly Digest, November 2025 | HOROI Project
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December 2, 2025 at 9:10 AM
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
- 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
The Tales of the Moon, Part 2 (HOROI Talk #18) | HOROI Project
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November 25, 2025 at 10:41 AM
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.
October 21, 2025 at 10:00 AM
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.
October 1, 2025 at 12:10 PM
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.
Reposted by HOROI Project
Important forthcoming volume. Astrologers at Work: Essays on the Practices and Techniques of Astrology in Memory of Helena Avelar.
brill.com/display/titl...
brill.com/display/titl...
September 23, 2025 at 12:07 PM
Important forthcoming volume. Astrologers at Work: Essays on the Practices and Techniques of Astrology in Memory of Helena Avelar.
brill.com/display/titl...
brill.com/display/titl...
Reposted by HOROI Project
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...
brill.com/display/titl...
Astrologers at Work
"Astrologers at Work" published on 30 Oct 2025 by Brill.
brill.com
September 13, 2025 at 8:58 AM
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...
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...
www.patreon.com/posts/monthl...
Monthly Digest, July 2025 | HOROI Project
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July 31, 2025 at 10:10 AM
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...
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)
July 10, 2025 at 3:12 PM
“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.
June 17, 2025 at 6:45 PM
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...
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...
June 16, 2025 at 12:26 PM
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...
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...
Reposted by HOROI Project
Looks fascinating www.sup.org/books/middle...
Forgotten Experts | Stanford University Press
Forgotten Experts offers a history of Ottoman court astrologers and traces their shifting authority and prestige over the long sixteenth century. These individuals served the Ottoman court with their ...
www.sup.org
June 6, 2025 at 6:49 PM
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...
www.patreon.com/posts/decenn...
The Decennials (talk #11) | HOROI Project
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May 28, 2025 at 3:19 PM
Together with uploading my most recent talk about the zodiac, a previous talk discussing “decennials” has been made public
www.patreon.com/posts/decenn...
www.patreon.com/posts/decenn...
Reposted by HOROI Project
Picked up a copy of this @caelien.bsky.social Review I wrote a piece in about the privilege of new astrologies 🥰
May 24, 2025 at 7:37 PM
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.
May 24, 2025 at 7:50 PM
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...
www.patreon.com/posts/zodiac...
May 19, 2025 at 12:45 PM
New HOROI Talk on May 25
www.patreon.com/posts/zodiac...
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.
The fragments of Dorotheus of Sidon – Introduction and frr. 2.A–B | HOROI Project
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April 30, 2025 at 11:54 AM
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?
April 28, 2025 at 7:26 PM
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...
www.patreon.com/posts/colors...
The colors, benefactions, gifts, vices, and faculties of the planets | HOROI Project
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April 16, 2025 at 5:34 PM
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...
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...
www.patreon.com/posts/125598...
Monthly Digest, March 2025 | HOROI Project
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March 31, 2025 at 4:14 PM
It’s the end of March. Time to publish the monthly digest of HOROI Project!
www.patreon.com/posts/125598...
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...
www.patreon.com/posts/monthl...
Monthly Digest, February 2025 | HOROI Project
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February 28, 2025 at 7:01 PM
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...
www.patreon.com/posts/monthl...