The table yupana artifacts from the Inca empire. These are often thought to be sophisticated counting boards, but there really isn't any evidence of that.
Thanks to Cinzia Florio for helping to answer some of my questions.
This is episode 67 of my video series about old calculating devices.
Download STL files of the yupanas here: cstaecker.fairfield.edu/~cstae...
Lo-res table yupana photos, and Inca art pictures from Cinzia Florio, "Recovering memory: the Inca key as yanantin", 2013.
Colored quipu photo "Quipo in the Museo Machu Picchu, Casa Concha, Cusco.jpg" by Wikimedia user Pi3.124, CC-BY-SA-4.0
Chordeleg-type photo around 3:30, and photo of the curved one that I also printed, are from Raccolte Extraeuropee del Castello Sforzesco, CC-BY-SA-3.0
De Velasco painting and from random internets- I'm not sure of the original source.
Chan Chan and Ancash yupana photos from Carlos Radicati di Primeglio, "El Sistema Contable De Los Incas: Yupana y Quipu", 1979
Machu Piccu photo by icelight on Flickr, CC-BY-2.0
Enso painting image by Wikimedia user Artanisen, CC-BY-SA-3.0
Stonehenge photo by Diego Delso, delso.photo, CC-BY-SA-4.0
End song inspired by "Hotter than a Molotov" by The Coup.
Chris Staecker webarea: cstaecker.fairfield.edu/~cstae...
#yupana #inca
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