It might be common knowledge that Da Vinci was an accomplished artist and mysterious figure, modern technology helps discover previously unknown hidden messages concealed in his paintings.
![The Virgin and Child with St Anne 1503, Leonardo Da Vinci [WSJ 10/30/19]](https://i.pinimg.com/originals/b4/21/4c/b4214cc3f05ceb1e62e1628ecc8b47f0.jpg)
