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Is there any proof or even just indication that they did: I can't find anything online and was hoping for some help.

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    $\begingroup$ Some sort of "awareness", as required in construction analemmatic sundials, can be traced as far as the Bronze Age, see Vodolazhskaya. There is some educated speculation that analemmatic diagrams were used by ancient Greeks to carve conic sundials from the time of Conon, see Rinner. $\endgroup$
    – Conifold
    May 3, 2023 at 3:33
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    $\begingroup$ But the earliest known source that draws the solar analemma explicitly is Vitruvius c. 30 BC, see Kittler-Darula, Analemma, the Ancient Sketch of Fictitious Sunpath Geometry:"Vitruvius summarised already around the year 30 BC the rough approximations of gnomon shades for different towns. In Book 9, Chapter 7, Vitruvius explained how to draw the so-called analemma commonly used to design sundials". The name "analemma" was used in the early 1st century AD by Diodorus of Alexandria. $\endgroup$
    – Conifold
    May 3, 2023 at 3:37
  • $\begingroup$ Thank you very much! $\endgroup$ May 3, 2023 at 10:08

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