Once only indicated through a sketch by Leonardo da Vinci from around 1495, concealed passageways have been discovered ...

Mysterious tunnels sketched by Leonardo da Vinci have been rediscovered after 500 years. A series of underground passages were found under Sforza Castle, a medieval fortress built in the 15th ...

paper architecture that existed only as drawings on paper, one might say," Dr. Francesca Fiorani, a Leonardo da Vinci expert told CNN. When Biolo and her team were working to digitise a well-known ...