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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Leonardo da Vinci's drawing reveals secret network of tunnels beneath Sforza Castle
Still, it wasn't until his successor, Ludovico Sforza, hired da Vinci to produce for the castle that it became a beacon of history. While creating the commissioned art, da Vinci recorded the ...