Mysterious tunnels sketched by Leonardo da Vinci in the late 1400s may have been found
Once only indicated through a sketch by Leonardo da Vinci from around 1495, concealed passageways have been discovered ...
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Mysterious tunnels sketched by Leonardo da Vinci in the late 1400s may have been found
The castle once spanned an area about ... but that they were not meant as blueprint for actual construction, just ideas of innovative building: paper architecture that existed only as drawings ...