In a plot straight out of pretty much any Dan Brown book, ancient sketches by Leonardo da Vinci have revealed the location of secret tunnels underneath a medieval castle in Milan, Italy. In the 15th ...

During this time, he also documented secret passages built for military purposes under the castle’s ghirlanda (outer wall). “This passageway is immortalized in Leonardo’s drawings and has ...

Now, scientists have uncovered a hidden feature underneath a medieval castle in Milan, Italy, that researchers once could only speculate about based on a sketch of Leonardo’s from around 1495 ...

or “the Moor,” because of his dark complexion and hair—secured the Duchy of Milan and continued renovating the castle. “This passageway is immortalized in Leonardo’s drawings and has ...