There's a hidden drawing underneath the "Mona Lisa" — and it shows that this masterpiece almost looked very different.

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 historic passages made famous by a Leonardo da Vinci drawing is just one of multiple tunnel sections.

One of the most famous Biblical artworks is undoubtedly this one. ‘The Last Supper’ is a mural created by da Vinci and shows the moment Jesus announces that one of his disciples will betray him. There is a sense of shock and dramatic emotion on the faces of people who are sitting around Jesus,