The truth behind the centuries-old legend associated with one of Leonardo da Vinci’s sketches has finally been uncovered. The legendary fifteenth-century polymath sketched hidden tunnels beneath Sforza Castle, once counted among the few largest citadels in Europe.
Even though construction of the medieval site began in 1358, it was constructed by Francesco Sforza, Duke of Milan, on the remnants of a fourteenth-century fortification. According to Live Science, this icon of the Italian Renaissance sketched the castle in 1495. Now, evidence related to Da Vinci's claims of a hidden passage kept secret in the historical structure’s underground has emerged.