1493—The marriage of Lucrezia to Giovanni Sforza, nephew of Ludovico, Duke of Milan, provides the Borgias with a powerful ally in northern Italy. 1494—France’s Charles VIII allies with the ...

An underground tunnel network long rumored thanks to drawings by Leonardo da Vinci under Milan’s Sforza Castle are proven to exist. Ground-penetrating radar and laser scanning revealed that the ...

Now, it is confirmed that they truly exist. A dozen secret tunnels have been discovered beneath the Sforza Castle in Milan.