Pieter Beullens
@pieterbeullens.bsky.social
PI of FitMA (Fluidity in the Medieval Aristotle) @kuleuvenuniversity.bsky.social and funded by @erc.europa.eu.
Author of The Friar and the Philosopher.
Medieval Greek-Latin translations of philosophy and science.
Author of The Friar and the Philosopher.
Medieval Greek-Latin translations of philosophy and science.
Pinned
FitMA has its own webpage! If you want to know more about Fluidity in the Medieval Aristotle, have a look! Exciting events coming up (remote attendance is possible)!
hiw.kuleuven.be/dwmc/researc...
hiw.kuleuven.be/dwmc/researc...
Including an important article by Justin Winzenrieth with a new and well-founded assessment of the supposed double recension of Aristotle's On the Soul, book 2, in its oldest MS E (Paris, BNF, gr. 1853). #philsky
doi.org/10.1017/S000...
doi.org/10.1017/S000...
September 17, 2026 at 6:49 PM
Including an important article by Justin Winzenrieth with a new and well-founded assessment of the supposed double recension of Aristotle's On the Soul, book 2, in its oldest MS E (Paris, BNF, gr. 1853). #philsky
doi.org/10.1017/S000...
doi.org/10.1017/S000...
Submitted!
(Actually the second article. I did not take the trouble of informing you the first time)
(Actually the second article. I did not take the trouble of informing you the first time)
September 17, 2026 at 9:23 AM
Submitted!
(Actually the second article. I did not take the trouble of informing you the first time)
(Actually the second article. I did not take the trouble of informing you the first time)
Reposted by Pieter Beullens
The moment you've all been waiting for over the last eleven months: here is the yearly update of the Supplementa tertia to the printed Aristoteles Latinus Codices volumes. Creeping up to 100 pages, more than 660 items, and plenty of hyperlinks! License CC-BY 4.0!
doi.org/10.5281/zeno...
doi.org/10.5281/zeno...
Aristoteles Latinus Codices. Supplementa tertia
Since the publication of the Supplementa altera to the Aristoteles Latinus catalogue volumes (1961), many more manuscripts have come to light and more detailed descriptions were published. The study o...
doi.org
September 15, 2026 at 7:28 AM
The moment you've all been waiting for over the last eleven months: here is the yearly update of the Supplementa tertia to the printed Aristoteles Latinus Codices volumes. Creeping up to 100 pages, more than 660 items, and plenty of hyperlinks! License CC-BY 4.0!
doi.org/10.5281/zeno...
doi.org/10.5281/zeno...
The same MS of Aristotle's Topics, with plenty of annotations, apparently ended up in a bookbinder's workshop. Plenty of bifolia were reused as pastedowns.
(@ubleipzig.bsky.social, MS 376)
resolver.staatsbibliothek-berlin.de/HSP000518E90...
(@ubleipzig.bsky.social, MS 376)
resolver.staatsbibliothek-berlin.de/HSP000518E90...
September 16, 2026 at 7:10 AM
The same MS of Aristotle's Topics, with plenty of annotations, apparently ended up in a bookbinder's workshop. Plenty of bifolia were reused as pastedowns.
(@ubleipzig.bsky.social, MS 376)
resolver.staatsbibliothek-berlin.de/HSP000518E90...
(@ubleipzig.bsky.social, MS 376)
resolver.staatsbibliothek-berlin.de/HSP000518E90...
The moment you've all been waiting for over the last eleven months: here is the yearly update of the Supplementa tertia to the printed Aristoteles Latinus Codices volumes. Creeping up to 100 pages, more than 660 items, and plenty of hyperlinks! License CC-BY 4.0!
doi.org/10.5281/zeno...
doi.org/10.5281/zeno...
Aristoteles Latinus Codices. Supplementa tertia
Since the publication of the Supplementa altera to the Aristoteles Latinus catalogue volumes (1961), many more manuscripts have come to light and more detailed descriptions were published. The study o...
doi.org
September 15, 2026 at 7:28 AM
The moment you've all been waiting for over the last eleven months: here is the yearly update of the Supplementa tertia to the printed Aristoteles Latinus Codices volumes. Creeping up to 100 pages, more than 660 items, and plenty of hyperlinks! License CC-BY 4.0!
doi.org/10.5281/zeno...
doi.org/10.5281/zeno...
A leaf from Aristotle's Topics used in a binding. No contemporary notes but a bit of doodling going on in the margins.
(@unierfurt.bsky.social, UB, CA 4° 141)
nbn-resolving.org/urn:nbn:de:u...
(@unierfurt.bsky.social, UB, CA 4° 141)
nbn-resolving.org/urn:nbn:de:u...
September 14, 2026 at 6:07 AM
A leaf from Aristotle's Topics used in a binding. No contemporary notes but a bit of doodling going on in the margins.
(@unierfurt.bsky.social, UB, CA 4° 141)
nbn-resolving.org/urn:nbn:de:u...
(@unierfurt.bsky.social, UB, CA 4° 141)
nbn-resolving.org/urn:nbn:de:u...
Leaf from Aristotle's Categories used as pastedown. Probably taken from the same MS as the previous post.
(@jlugiessen.bsky.social, Hs 54)
nbn-resolving.org/urn:nbn:de:h...
(@jlugiessen.bsky.social, Hs 54)
nbn-resolving.org/urn:nbn:de:h...
September 9, 2026 at 6:14 AM
Leaf from Aristotle's Categories used as pastedown. Probably taken from the same MS as the previous post.
(@jlugiessen.bsky.social, Hs 54)
nbn-resolving.org/urn:nbn:de:h...
(@jlugiessen.bsky.social, Hs 54)
nbn-resolving.org/urn:nbn:de:h...
Aristotelian waste lining the covers of this MS: the front pastedown was taken from a commentary on the Physics (beginning of the text, apparently incomplete); back is from the Categories (@jlugiessen.bsky.social, Hs 53)
nbn-resolving.org/urn:nbn:de:h...
nbn-resolving.org/urn:nbn:de:h...
September 7, 2026 at 7:04 AM
Aristotelian waste lining the covers of this MS: the front pastedown was taken from a commentary on the Physics (beginning of the text, apparently incomplete); back is from the Categories (@jlugiessen.bsky.social, Hs 53)
nbn-resolving.org/urn:nbn:de:h...
nbn-resolving.org/urn:nbn:de:h...
I am finalizing the yearly update of my Supplementa of Aristoteles Latinus Codices. If you know (or own) manuscripts or fragments of Latin Aristotle texts that were not included before, now is the time to drop me a line!
The yearly update of the Supplementa tertia (v. 6.7) is out! Additions and corrections to the three published volumes of Aristoteles Latinus Codices, with plenty of hyperlinks to digital images! If you know or own other MSS of the medieval Latin Aristotle, please reach out!
doi.org/10.5281/zeno...
doi.org/10.5281/zeno...
September 6, 2026 at 11:49 AM
I am finalizing the yearly update of my Supplementa of Aristoteles Latinus Codices. If you know (or own) manuscripts or fragments of Latin Aristotle texts that were not included before, now is the time to drop me a line!
Reposted by Pieter Beullens
Publication – « The Medieval Aristotle. Studies Celebrating Half a Century of Aristoteles Latinus in Leuven, 1973-2023 », éd. Nena Bobovnik , Clelia V. Crialesi, Lisa Devriese
rmblf.be/2026/09/03/p...
rmblf.be/2026/09/03/p...
Publication – « The Medieval Aristotle. Studies Celebrating Half a Century of Aristoteles Latinus in Leuven, 1973-2023 », éd. Nena Bobovnik , Clelia V. Crialesi, Lisa Devriese
For fifty years, the Aristoteles Latinus project has deepened our understanding of how Aristotle entered the Latin Middle Ages. Based in Leuven and rooted in early twentieth-century international c…
rmblf.be
September 3, 2026 at 5:45 AM
Publication – « The Medieval Aristotle. Studies Celebrating Half a Century of Aristoteles Latinus in Leuven, 1973-2023 », éd. Nena Bobovnik , Clelia V. Crialesi, Lisa Devriese
rmblf.be/2026/09/03/p...
rmblf.be/2026/09/03/p...
Reposted by Pieter Beullens
La première séance du séminaire “Textes naturalistes latins du Moyen Âge” se tient mercredi 30 septembre 2026 (14h-16h) au @campuscondorcet.bsky.social et en visioconférence. L'étude portera sur les «pierres animales» et leurs propriétés : Antiquité gréco-latine, Moyen Âge arabe, latin et français.
Textes naturalistes latins du Moyen Âge
Ce séminaire réunit des chercheurs et des étudiants de master et de doctorat autour de textes scientifiques médiévaux latins, qu’ils traduisent et dont ils étudient ensemble les sources et les textes ...
www.irht.cnrs.fr
September 2, 2026 at 7:31 AM
La première séance du séminaire “Textes naturalistes latins du Moyen Âge” se tient mercredi 30 septembre 2026 (14h-16h) au @campuscondorcet.bsky.social et en visioconférence. L'étude portera sur les «pierres animales» et leurs propriétés : Antiquité gréco-latine, Moyen Âge arabe, latin et français.
Reposted by Pieter Beullens
You have 29 more days to submit an application for the short-term Nottebohm Fellowships for #Bookhistory research in Antwerp! Come do research in the collections of the Plantin-Moretus Museum and/or Hendrik Conscience Library!
consciencebibliotheek.be/en/fellowshi...
consciencebibliotheek.be/en/fellowshi...
Nottebohm Fellowship for Book Historical Research | Erfgoedbibliotheek Hendrik Conscience
Every year, the Hendrik Conscience Heritage Library and the Museum Plantin-Moretus offer a short-term Nottebohm fellowship to two researchers, with the gracious support of the Thierry and Frédéric Not...
consciencebibliotheek.be
September 2, 2026 at 6:30 AM
You have 29 more days to submit an application for the short-term Nottebohm Fellowships for #Bookhistory research in Antwerp! Come do research in the collections of the Plantin-Moretus Museum and/or Hendrik Conscience Library!
consciencebibliotheek.be/en/fellowshi...
consciencebibliotheek.be/en/fellowshi...
You may have missed this during the summer. Quite a playground for those who like MS fragments!
I uploaded my expanded list of binding waste fragments to Zenodo. The format is csv (UTF-8) with semicolon as separator. CC-BY, feel free to use!
doi.org/10.5281/zeno...
PS: I thought I'd never say it, but I used CoPilot to convert my xcl with multiple tabs to csv. I admit it did a half-decent job.
doi.org/10.5281/zeno...
PS: I thought I'd never say it, but I used CoPilot to convert my xcl with multiple tabs to csv. I admit it did a half-decent job.
Medieval manuscript fragments as binding waste
This file contains information on fragments of medieval manuscripts in Latin (and a few in Hebrew) found as binding waste in other manuscripts or early printed books. It includes references to online ...
doi.org
September 2, 2026 at 6:31 AM
You may have missed this during the summer. Quite a playground for those who like MS fragments!
The program for the Mmmonk School 2026 is out. Looks quite cool, I must most modestly say...!
www.mmmonk.be/en/news/mmmo...
www.mmmonk.be/en/news/mmmo...
Programme Mmmonk School 2026 announced | Mmmonk
Mark your calendars for 3 and 10 December 2026 (4–6 pm CET) and join us for four engaging webinars exploring the medieval book! This year’s programme will feature textile covers, the intricacies of me...
www.mmmonk.be
September 1, 2026 at 6:41 PM
The program for the Mmmonk School 2026 is out. Looks quite cool, I must most modestly say...!
www.mmmonk.be/en/news/mmmo...
www.mmmonk.be/en/news/mmmo...
With an article by Riccardo Macchioro on the impact of variance in Latin manuscripts on the understanding of texts - nicely illustrating the research objective of my ongoing FitMA project!
doi.org/10.25592/uhhfdm.19358
doi.org/10.25592/uhhfdm.19358
August 30, 2026 at 7:28 AM
With an article by Riccardo Macchioro on the impact of variance in Latin manuscripts on the understanding of texts - nicely illustrating the research objective of my ongoing FitMA project!
doi.org/10.25592/uhhfdm.19358
doi.org/10.25592/uhhfdm.19358
In procrastination news: just finished the draft of an article on some letters by Berengar of Tours. Anyone here who really knows something about the guy and his writings? #medievalsky
August 27, 2026 at 2:12 PM
In procrastination news: just finished the draft of an article on some letters by Berengar of Tours. Anyone here who really knows something about the guy and his writings? #medievalsky
Leaves from an 11th-century sacramentary, preserved for us as pastedowns (Alençon, BM, 16)
arca.irht.cnrs.fr/ark:/63955/m...
arca.irht.cnrs.fr/ark:/63955/m...
August 26, 2026 at 6:43 AM
Leaves from an 11th-century sacramentary, preserved for us as pastedowns (Alençon, BM, 16)
arca.irht.cnrs.fr/ark:/63955/m...
arca.irht.cnrs.fr/ark:/63955/m...
The "undetermined text" on the inside of the back cover can be identified as a passage from book I of Aristotle's Nicomachean Ethics in Latin
(@ubleipzig.bsky.social, Ms 1384)
resolver.staatsbibliothek-berlin.de/HSP0005202F0...
(@ubleipzig.bsky.social, Ms 1384)
resolver.staatsbibliothek-berlin.de/HSP0005202F0...
August 24, 2026 at 5:45 AM
The "undetermined text" on the inside of the back cover can be identified as a passage from book I of Aristotle's Nicomachean Ethics in Latin
(@ubleipzig.bsky.social, Ms 1384)
resolver.staatsbibliothek-berlin.de/HSP0005202F0...
(@ubleipzig.bsky.social, Ms 1384)
resolver.staatsbibliothek-berlin.de/HSP0005202F0...
Leaves from Aristotle's De interpretatione (translated into Latin by Boethius) and from the latter's treatise De topicis differentiis recycled as pastedowns
(@jlugiessen.bsky.social, UB, 692)
resolver.staatsbibliothek-berlin.de/HSP0006560D0...
(@jlugiessen.bsky.social, UB, 692)
resolver.staatsbibliothek-berlin.de/HSP0006560D0...
August 21, 2026 at 7:20 AM
Leaves from Aristotle's De interpretatione (translated into Latin by Boethius) and from the latter's treatise De topicis differentiis recycled as pastedowns
(@jlugiessen.bsky.social, UB, 692)
resolver.staatsbibliothek-berlin.de/HSP0006560D0...
(@jlugiessen.bsky.social, UB, 692)
resolver.staatsbibliothek-berlin.de/HSP0006560D0...
"The book is written in a clear, engaging, and frequently ironic style."
A kind review of my "The Friar and the Philosopher" by Roberto Zambiasi in Speculum 101 (2026), 929-930 @medievalacademy.bsky.social
doi.org/10.1086/741996
A kind review of my "The Friar and the Philosopher" by Roberto Zambiasi in Speculum 101 (2026), 929-930 @medievalacademy.bsky.social
doi.org/10.1086/741996
August 20, 2026 at 5:59 PM
"The book is written in a clear, engaging, and frequently ironic style."
A kind review of my "The Friar and the Philosopher" by Roberto Zambiasi in Speculum 101 (2026), 929-930 @medievalacademy.bsky.social
doi.org/10.1086/741996
A kind review of my "The Friar and the Philosopher" by Roberto Zambiasi in Speculum 101 (2026), 929-930 @medievalacademy.bsky.social
doi.org/10.1086/741996
Reposted by Pieter Beullens
Sometimes philosophers really dislike the conclusions of certain arguments by reductio & rebrand them as 'paradoxes,' but sometimes they simply do not. Why is this? Find out in Boaz Schuman's recent 📃, which recovers the logical works of Al-Fārābī 👇 www.tandfonline.com/doi/abs/10.1... #philsky #HPS
Al-Fārābī and Quine on reductio and paradox
If you dislike the conclusion of an argument by reductio, you can rebrand it as a paradox. We did this with Zeno, and more recently McTaggart. But what – if anything – is the principle at play? Is ...
www.tandfonline.com
August 18, 2026 at 9:50 AM
Sometimes philosophers really dislike the conclusions of certain arguments by reductio & rebrand them as 'paradoxes,' but sometimes they simply do not. Why is this? Find out in Boaz Schuman's recent 📃, which recovers the logical works of Al-Fārābī 👇 www.tandfonline.com/doi/abs/10.1... #philsky #HPS
The description of these pastedowns suggests that the text is Aristotle, but it is actually from the Liber sex principiorum, a treatise that is often added to the Categories in MSS of the logica vetus
(@unierfurt.bsky.social, Dep. Erf., CA 4° 353)
resolver.staatsbibliothek-berlin.de/HSP0003EEA10...
(@unierfurt.bsky.social, Dep. Erf., CA 4° 353)
resolver.staatsbibliothek-berlin.de/HSP0003EEA10...
August 19, 2026 at 7:19 AM
The description of these pastedowns suggests that the text is Aristotle, but it is actually from the Liber sex principiorum, a treatise that is often added to the Categories in MSS of the logica vetus
(@unierfurt.bsky.social, Dep. Erf., CA 4° 353)
resolver.staatsbibliothek-berlin.de/HSP0003EEA10...
(@unierfurt.bsky.social, Dep. Erf., CA 4° 353)
resolver.staatsbibliothek-berlin.de/HSP0003EEA10...
Reposted by Pieter Beullens
Is there a handy list or publication of medieval manuscripts produced IN Oxford, pre-1500? Out of my depth here bibliographically. @obs1922.bsky.social?
August 16, 2026 at 4:43 PM
Is there a handy list or publication of medieval manuscripts produced IN Oxford, pre-1500? Out of my depth here bibliographically. @obs1922.bsky.social?
Reposted by Pieter Beullens
Call for Papers: TransLATINg the Bible: the Creation, Transmission, and Reception of the Latin Bible, conference at KU Leuven April 7-9, 2027
@kuleuventheology.bsky.social
tinyurl.com/2rej975v
@kuleuventheology.bsky.social
tinyurl.com/2rej975v
June 18, 2026 at 8:15 AM
Call for Papers: TransLATINg the Bible: the Creation, Transmission, and Reception of the Latin Bible, conference at KU Leuven April 7-9, 2027
@kuleuventheology.bsky.social
tinyurl.com/2rej975v
@kuleuventheology.bsky.social
tinyurl.com/2rej975v
Last semester, the FitMA team organised a wonderful lecture series. Theme of the presentations are the arrival and reception of Aristotle's De anima in the medieval Latin world, and dealing with difficult text transmissions. You can review them from your armchair!
www.youtube.com/playlist?lis...
www.youtube.com/playlist?lis...
ERC Fluidity in the Medieval Aristotle – FitMA Lecture series - YouTube
The FitMA lecture series aims to establish a wider framework for the ERC-funded research project ‘Fluidity in the Medieval Aristotle’ and to share its result...
www.youtube.com
August 14, 2026 at 12:30 PM
Last semester, the FitMA team organised a wonderful lecture series. Theme of the presentations are the arrival and reception of Aristotle's De anima in the medieval Latin world, and dealing with difficult text transmissions. You can review them from your armchair!
www.youtube.com/playlist?lis...
www.youtube.com/playlist?lis...