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sgessner.bsky.social
samuel gessner
@sgessner.bsky.social
This is a wonderful moment of preparation of the upcoming EIDA workshop. I am most grateful for this support, and look very much forward to see the instruments in action! (Even if, as a consequence, we figure out that we got it all wrong with our reconstruction of this arcane instrument…)
It is a Saturday and what better activity than building planicelia together with @sgessner.bsky.social and Florence Somer in preparation for Celestial Scripts on Monday!
September 20, 2025 at 2:45 PM
Reposted by samuel gessner
It is a Saturday and what better activity than building planicelia together with @sgessner.bsky.social and Florence Somer in preparation for Celestial Scripts on Monday!
September 20, 2025 at 2:31 PM
Reposted by samuel gessner
🎉 Today's the first day of our "Euclid's Elements and Practical Mathematics" workshop in Wuppertal 📖 I'll try to present the speakers, beginning with Philip Beeley ⤵️
May 22, 2025 at 12:29 PM
Already looking forward to the 2026 edition!
April 19, 2025 at 2:11 PM
It’s a snapshot of the in-person participants after the final session.

Full programme:

eida.hypotheses.org/conference-2...
Conference 2025
A long history of diagrammatization in the astral sciences Third International EIDA Conference Org. Matthieu Husson, Samuel Gessner, Divna Manolova, Stefan Zieme, Florence Somer   Practical aspects  O...
eida.hypotheses.org
April 19, 2025 at 2:07 PM
Even more so, to help shape this shared journey: creating spaces for conversations between people and between diagrams from historical manuscripts and prints—in Chinese, Arabic, Persian, Hebrew, Greek, Latin, and various vernacular traditions.
April 19, 2025 at 2:01 PM
Just wrapped up the 2025 EIDA conference—once again, an incredibly productive and inspiring gathering. Held in the historic building of the Observatoire de Paris, it was a true pleasure to listen to and exchange ideas with so many sharp and generous scholars—both in person and online.
April 19, 2025 at 1:50 PM
Reposted by samuel gessner
From June 2 to June 6, 2025, the Training Week: A Global History of Astronomy on Primary Sources: New Approaches, New Digital Tools will take place in Paris.

Limited number of scholarships; deadline April 18, 2025.

For more details: eida.hypotheses.org/seminars-2/t...
March 10, 2025 at 10:16 AM
Reposted by samuel gessner
Si vous aimez plonger dans le monde merveilleux des astrolabes, cadrans solaires et livres d’astronomie anciens, suivez ce fil de toute urgence. 👇
Thanks @stephenaj.bsky.social for sharing these treasures!
#histsci #historyofastronomy 🔭
On the way to Paris for a hybrid seminar at the Observatoire on Tuesday. I'm speaking on medieval Latin instruments: "Early astronomy in context: the view from the museum” and Samuel Gessner will then tackle a troublesome trepidation sphere. Times and abstracts at syrte.obspm.fr/spip/science...
Séminaire d'histoire des sciences astronomiques
syrte.obspm.fr
January 20, 2025 at 10:50 AM