Image: 1645 kircher - steganographia
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Description: Illustration of Kircher's Steganographic mirror in his 1645 book Ars Magna Lucis et Umbrae
Title: 1645 kircher - steganographia
Credit: https://books.google.nl/books?id=wYlDAAAAcAAJ&pg=PA792#v=onepage&q&f=false
Author: Athanasius Kircher
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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