Despite its name, this sandstone slab is not a simple stone. It was once part of a monument, an ancient epigraph measuring three by three metres carrying about 50 lines of text.
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This late-medieval document is written in encoded text that has yet to be cracked. But its numerous illustrations provide clues about its content.
Habsburg emperor Rudolf II owned a spirit-summoning alchemical hand bell. We want to decipher its cryptic Greek inscriptions.
Top contributors
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PostDoc in Digital Humanities at Centre of Information Modelling (University of Graz), University of Graz
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Research Fellow, Department of Media, Communications, Creative Arts, Language, and Literature, Macquarie University
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Research assistant, Goethe University Frankfurt am Main
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Research Fellow, School of Information Technology and Electrical Engineering, The University of Queensland
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Francesco Perono Cacciafoco is a Friend of The Conversation.
Associate Professor in Linguistics, Xi'an Jiaotong-Liverpool University