Painting: 8 mysterious messages hidden in works of art of Renaissance

Something in "Da Vinci Code" Dan Brown were such that turned each viewer in super - the detective. Cloths of the well-known painters often hide in themselves fascinating confidential messages. There are some well-known pictures of Renaissance, in layers of which oil paints mysterious codes are allegedly hidden. Whether so it and if it is the truth what it messages — further in the review. In more detail...