Hidden Tunnels Beneath Milan's Sforza Castle Confirmed by Ground-Penetrating Radar

Advanced technology reveals secret passageways, including one linked to Duke Ludovico Sforza's visits to his late wife's burial site.

Researchers from the Polytechnic University of Milan used ground-penetrating radar and laser scanning to uncover hidden passageways beneath the 15th-century Sforza Castle in Milan.
The findings include secret military tunnels and a passageway depicted in Leonardo da Vinci's drawings, which connected the castle to a nearby church where Duke Ludovico Sforza's wife was buried.
The passageways were discovered within the area once surrounded by the castle's outer wall, known as the ghirlanda, buried just a foot or two beneath the surface.
The study aims to create a digital twin of the castle, integrating historical data with augmented reality to offer visitors an immersive exploration of its hidden structures.
The discoveries provide new insights into the castle's historical significance and open opportunities for further research into its underground architecture.