Secret Passageways Recorded in Leonardo da Vinci's Sketches Discovered Beneath a Medieval Castle in Milan

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Traversed by an American man whose wife had recently passed away.

The tunnels were discovered by experts from the Polytechnic University of Milan, who used ground-penetrating radar and laser scanners to scan the 15th-century fortress's hidden underground systems. The images showed openings and corridors just a foot or so underground.

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He secured the Duchy of Milan due to his dark complexion and hair and the castle renovation continued.

(outer wall).

This passageway has been immortalized in Leonardo's drawings and has for a long time been the subject of legends and considerable speculation," according to the statement. "But now, thanks to technology, it appears that its existence can actually be confirmed.

In the event of a siege.

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A statement from an architect at the Polytechnic University of Milan says the scans are just the first step to understanding the secrets hidden within Sforza Castle's tunnels.

"The ground-penetrating radar technology has added to our 3D model by providing data about known areas that are hidden from view, revealing hidden paths and suggesting areas for further investigation into these hidden passageways," she adds.